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*****************************************************************************
 Mapscript API Reference, MapServer version 5.0 
*****************************************************************************

:Author: Sean Gillies
:Contact: sgillies@frii.com
:Revision: $Revision: 7249 $
:Date: $Date: 2008-01-07 07:43:27 -0800 (Mon, 07 Jan 2008) $

..  The next heading encountered becomes our H2
..

.. sectnum::

.. contents::
    :depth: 2
    :backlinks: top


=============================================================================
 Introduction
=============================================================================

This is language agnostic documentation for the mapscript interface to 
MapServer generated by SWIG.  This document is intended for developers
and to serve as a reference for writers of more extensive, language
specific documentation in DocBook format for the MDP.

-----------------------------------------------------------------------------
 Appendices
-----------------------------------------------------------------------------

Language-specific extensions are described in the following appendices

Python Appendix [`Text <python.txt>`__, `HTML <python.html>`__] 

-----------------------------------------------------------------------------
 Documentation Elements
-----------------------------------------------------------------------------

Classes will be documented in alphabetical order in the manner outlined below.
Attributes and methods will be formatted as definition lists with the
attribute or method as item, the type or return type as classifier, and a
concise description. To make the document as agnostic as possible, we refer to
the following types: int, float, and string.  There are yet no mapscript
methods that return arrays or sequences or accept array or sequence arguments.

We will use the SWIG term *immutable* to indicate that an attribute's value
is read-only.

------
fooObj
------

A paragraph or two about class fooObj.

fooObj Attributes
-----------------

attribute : type [access]
    Concise description of the attribute.

Attribute name are completely lower case.  Multiple words are
packed together like *outlinecolor*.

Note that because of the way that mapscript is generated many confusing,
meaningless, and even dangerous attributes are creeping into objects.  See
outputFormatObj.refcount for example.  Until we get a grip on the structure
members we are exposing to SWIG this problem will continue to grow.

fooObj Methods
--------------

method(type mandatory_parameter [, type optional_parameter=default]) : type
    Description of the method including elaboration on the method
    arguments, the method's actions, and returned values.  Optional
    parameters and their default values are enclosed in brackets.

Class method names are camel case with a leading lower case character
like *getExpressionString*.

-----------------------------------------------------------------------------
 Additional Documentation
-----------------------------------------------------------------------------

There's no point in duplicating the MapServer Mapfile Reference, which
remains the primary reference for mapscript class attributes.


=============================================================================
 Mapscript Variables
=============================================================================

-----------------------------------------------------------------------------
 Version
-----------------------------------------------------------------------------

=====================  ============  ===========
 Name                     Type         Value   
---------------------  ------------  -----------
  MS_VERSION            character       4.8
=====================  ============  ===========

-----------------------------------------------------------------------------
 Logical Control - Boolean Values
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
  MS_TRUE              integer           1         
  MS_ON                integer           1         
  MS_YES               integer           1         
  MS_FALSE             integer           0         
  MS_OFF               integer           0         
  MS_NO                integer           0         
=====================  ============  ===========

-----------------------------------------------------------------------------
 Logical Control - Status Values
-----------------------------------------------------------------------------
=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
  MS_DEFAULT           integer           2         
  MS_EMBED             integer           3         
  MS_DELETE            integer           4         
=====================  ============  ===========

-----------------------------------------------------------------------------
 Map Units
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
   MS_DD               integer                
   MS_FEET             integer                
   MS_INCHES           integer                
   MS_METERS           integer                
   MS_MILES            integer                
   MS_PIXELS           integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Layer Types
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_LAYER_POINT        integer                
 MS_LAYER_LINE         integer                
 MS_LAYER_POLYGON      integer                
 MS_LAYER_RASTER       integer                
 MS_LAYER_ANNOTATION   integer                
 MS_LAYER_QUERY        integer                
 MS_LAYER_CIRCLE       integer                
 MS_LAYER_TILEINDEX    integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Font Types
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_TRUETYPE           integer                
 MS_BITMAP             integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Label Positions
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_UL                 integer                
 MS_LL                 integer                
 MS_UR                 integer                
 MS_LR                 integer                
 MS_CL                 integer                
 MS_CR                 integer                
 MS_UC                 integer                
 MS_LC                 integer                
 MS_CC                 integer                
 MS_AUTO               integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Label Size (Bitmap only)
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_TINY               integer                
 MS_SMALL              integer                
 MS_MEDIUM             integer                
 MS_LARGE              integer                
 MS_GIANT              integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Shape Types
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_SHAPE_POINT        integer                
 MS_SHAPE_LINE         integer                
 MS_SHAPE_POLYGON      integer                
 MS_SHAPE_NULL         integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Measured Shape Types
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_SHP_POINTM         integer        21      
 MS_SHP_ARCM           integer        23      
 MS_SHP_POLYGONM       integer        25      
 MS_SHP_MULTIPOINTM    integer        28      
=====================  ============  ===========

-----------------------------------------------------------------------------
 Shapefile Types
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_SHAPEFILE_POINT         integer        1       
 MS_SHAPEFILE_ARC           integer        3       
 MS_SHAPEFILE_POLYGON       integer        5       
 MS_SHAPEFILE_MULTIPOINT    integer        8       
==========================  ============  ===========

-----------------------------------------------------------------------------
 Query Types
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_SINGLE             integer          0     
 MS_MULTIPLE           integer          1     
=====================  ============  ===========

-----------------------------------------------------------------------------
 File Types
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_FILE_MAP           integer                
 MS_FILE_SYMBOL        integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Querymap Styles
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_NORMAL             integer                
 MS_HILITE             integer                
 MS_SELECTED           integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Connection Types
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_INLINE                  integer                
 MS_SHAPEFILE               integer                
 MS_TILED_SHAPEFILE         integer                
 MS_SDE                     integer                
 MS_OGR                     integer                
 MS_POSTGIS                 integer               
 MS_WMS                     integer                
 MS_ORACLESPATIAL           integer                
 MS_WFS                     integer                
 MS_GRATICULE               integer                
 MS_MYGIS                   integer                
 MS_RASTER                  integer                
==========================  ============  ===========

-----------------------------------------------------------------------------
 DB Connection Types
-----------------------------------------------------------------------------

=====================  ============  ===========
   Name                   Type         Value   
---------------------  ------------  -----------
 MS_DB_XBASE            integer                
 MS_DB_CSV              integer                
 MS_DB_MYSQL            integer                
 MS_DB_ORACLE           integer                
 MS_DB_POSTGRES         integer                
=====================  ============  ===========

-----------------------------------------------------------------------------
 Join Types
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_JOIN_ONE_TO_ONE         integer                
 MS_JOIN_ONE_TO_MANY        integer                
==========================  ============  ===========

-----------------------------------------------------------------------------
 Line Join Types (for rendering)
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_CJC_NONE                integer                
 MS_CJC_BEVEL               integer                
 MS_CJC_BUTT                integer                
 MS_CJC_MITER               integer                
 MS_CJC_ROUND               integer                
 MS_CJC_SQUARE              integer                
 MS_CJC_TRIANGLE            integer                
==========================  ============  ===========

-----------------------------------------------------------------------------
 Image Types
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 GD/GIF                     integer                
 GD/PNG                     integer                
 GD/PNG24                   integer                
 GD/JPEG                    integer                
 GD/WBMP                    integer                
 swf                        integer                
 imagemap                   integer                
 pdf                        integer                
 GDAL/GTiff                 integer                
==========================  ============  ===========

-----------------------------------------------------------------------------
 Image Modes
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_IMAGEMODE_PC256         integer                
 MS_IMAGEMODE_RGB           integer                
 MS_IMAGEMODE_RGBA          integer                
 MS_IMAGEMODE_INT16         integer                
 MS_IMAGEMODE_FLOAT32       integer                
 MS_IMAGEMODE_BYTE          integer                
 MS_IMAGEMODE_NULL          integer                
 MS_NOOVERRIDE              integer                
 MS_GD_ALPHA                integer       1000     
==========================  ============  ===========

-----------------------------------------------------------------------------
 Symbol Types
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_SYMBOL_SIMPLE           integer                
 MS_SYMBOL_VECTOR           integer                
 MS_SYMBOL_ELLIPSE          integer                
 MS_SYMBOL_PIXMAP           integer                
 MS_SYMBOL_TRUETYPE         integer                
 MS_SYMBOL_CARTOLINE        integer                
==========================  ============  ===========

-----------------------------------------------------------------------------
 Return Codes
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_SUCCESS                  integer           0
 MS_FAILURE                  integer           1    
 MS_DONE                     integer           2    
==========================  ============  ===========

-----------------------------------------------------------------------------
 Limiters
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_MAXSYMBOLS              long                   
 MS_MAXVECTORPOINTS         long                   
 MS_MAXSTYLELENGTH          long                   
 MS_IMAGECACHESIZE          long                   
==========================  ============  ===========

-----------------------------------------------------------------------------
 Error Return Codes
-----------------------------------------------------------------------------

==========================  ============  ===========
   Name                         Type         Value   
--------------------------  ------------  -----------
 MS_NOERR                   long            0      
 MS_IOERR                   long            1      
 MS_MEMERR                  long            2      
 MS_TYPEERR                 long            3      
 MS_SYMERR                  long            4      
 MS_REGEXERR                long            5      
 MS_TTFERR                  long            6      
 MS_DBFERR                  long            7      
 MS_GDERR                   long            8      
 MS_IDENTERR                long            9      
 MS_EOFERR                  long           10      
 MS_PROJERR                 long           11      
 MS_MISCERR                 long           12      
 MS_CGIERR                  long           13      
 MS_WEBERR                  long           14      
 MS_IMGERR                  long           15      
 MS_HASHERR                 long           16      
 MS_JOINERR                 long           17      
 MS_NOTFOUND                long           18      
 MS_SHPERR                  long           19      
 MS_PARSEERR                long           20      
 MS_SDEERR                  long           21      
 MS_OGRERR                  long           22      
 MS_QUERYERR                long           23      
 MS_WMSERR                  long           24      
 MS_WMSCONNERR              long           25      
 MS_ORACLESPATIALERR        long           26      
 MS_WFSERR                  long           27      
 MS_WFSCONNERR              long           28      
 MS_MAPCONTEXTERR           long           29      
 MS_HTTPERR                 long           30      
 MS_CHILDERR                long           31      
 MS_WCSERR                  long           32      
 MS_NUMERRORCODES           long           33      
 MESSAGELENGTH              long           33      
 ROUTINELENGTH              long           33      
==========================  ============  ===========


=============================================================================
 Mapscript Functions
=============================================================================

msCleanup() : void
  msCleanup() attempts to recover all dynamically allocated resources allocated
  by MapServer code and dependent libraries.  It it used primarily for final
  cleanup in scripts that need to do memory leak testing to get rid of "noise"
  one-time allocations.  It should not normally be used by production code. 

msGetVersion() : string
  Returns a string containing MapServer version information, and details on 
  what optional components are built in.  The same report as produced by 
  "mapserv -v".

msGetVersionInt() :  int
  Returns the MapServer version number (x.y.z) as an integer 
  (x*10000 + y*100 + z). (New in v5.0) e.g. V5.4.3 would return 50403.

msIO_installStdoutToBuffer() : void
  Installs a mapserver IO handler directing future stdout output to a memory
  buffer. 

msIO_installStdinFromBuffer() : void
  Installs a mapserver IO handler directing future stdin reading (ie. post 
  request capture) to come from a buffer. 

msIO_resetHandlers() : void
  Resets the default stdin and stdout handlers in place of "buffer" based
  handlers. 

msIO_getStdoutBufferString() : string
  Fetch the current stdout buffer contents as a string.  This method does
  not clear the buffer.

msIO_getStdoutBufferBytes() : binary data
  Fetch the current stdout buffer contents as a binary buffer.  The exact
  form of this buffer will vary by mapscript language (eg. string in Python,
  byte[] array in Java and C#, unhandled in perl)

msIO_stripStdoutBufferContentType() : string
  Strip the Content-type header off the stdout buffer if it has one, and
  if a content type is found it is return (otherwise NULL/None/etc). 

  
=============================================================================
 Mapscript Classes
=============================================================================

-----------------------------------------------------------------------------
 classObj
-----------------------------------------------------------------------------

An instance of classObj is associated with with one instance of layerObj_.

::

    +-------+ 0..*     1 +-------+
    | Class | <--------> | Layer |
    +-------+            +-------+

The other important associations for classObj are with styleObj_, 
labelObj_, and hashTableObj_.

::

    +-------+ 1     0..* +-------+
    | Class | ---------> | Style |
    +-------+            +-------+

    +-------+ 1     0..1 +-------+
    | Class | ---------> | Label |
    +-------+            +-------+

    +-------+ 1        1 +-----------+
    | Class | ---------> | HashTable |
    +-------+            |    --     |
                         | metadata  |
                         +-----------+


Multiple class styles are now supported in 4.1.  See the styleObj_ section
for details on use of multiple class styles.

classObj Attributes
-------------------

debug : int
    MS_TRUE or MS_FALSE

keyimage : string
    **TODO** Not sure what this attribute is for

label : labelObj_ immutable
    Definition of class labeling

layer : layerObj_ immutable
    Reference to the parent layer

maxscale : float
    The maximum scale at which class is drawn
   
metadata : hashTableObj_ immutable
    class metadata hash table.

minscale : float
    The minimum scale at which class is drawn

name : string
    Unique within a layer

numstyles : int
    Number of styles for class.  In the future, probably the 4.4 release,
    this attribute will be made *immutable*.
    
status : int
    MS_ON or MS_OFF.  Draw features of this class or do not.
    
template : string
    Template for queries

title : string
    Text used for legend labeling

type : int
    The layer type of its parent layer

classObj Methods
----------------

new classObj( [ layerObj_ parent_layer=NULL ] ) : classObj
    Create a new child classObj instance at the tail (highest index) of 
    the class array of the *parent_layer*.  A class can be created outside
    the context of a parent layer by omitting the single constructor
    argument.

clone( ) : classObj
    Return an independent copy of the class without a parent layer.

createLegendIcon( mapObj_ map, layerObj_ layer, int width, int height ) : imageObj_
    Draw and return a new legend icon.

drawLegendIcon( mapObj_ map, layerObj_ layer, int width, int height, imageObj_ image, int dstx, int dsty ) : int
    Draw the legend icon onto *image* at *dstx*, *dsty*.  Returns 
    MS_SUCCESS or MS_FAILURE.

getExpressionString() : string
    Return a string representation of the expression enclosed in the quote
    characters appropriate to the expression type.

getFirstMetaDataKey() : string
    Returns the first key in the metadata hash table.  With
    getNextMetaDataKey(), provides an opaque iterator over keys.
    
getMetaData( string key ) : string
    Return the value of the classObj metadata at *key*.

getNextMetaDataKey( string lastkey ) : string
    Returns the next key in the metadata hash table or NULL if
    *lastkey* is the last valid key.  If *lastkey* is NULL, returns the
    first key of the metadata hash table.
   
.. note:: getFirstMetaDataKey(), getMetaData(), and getNextMetaDataKey()
          are deprecated and will be removed in a future version.  Replaced
          by direct metadata access, see hashTableObj_.

getStyle( int index ) : styleObj_
    Return a reference to the styleObj at *index* in the styles array.

    See the styleObj_ section for more details on multiple class styles.

getTextString() : string
    Return a string representation of the text enclosed in the quote
    characters appropriate to the text expression type (logical or 
    simple string).

insertStyle( styleObj_ style [, int index=-1 ] ) : int
    Insert a **copy** of *style* into the styles array at index *index*.
    Default is -1, or the end of the array.  Returns the index at which the 
    style was inserted.

moveStyleDown( int index ) : int
    Swap the styleObj at *index* with the styleObj *index* + 1.
    
moveStyleUp( int index ) : int
    Swap the styleObj at *index* with the styleObj *index* - 1.

removeStyle( int index ) : styleObj_
    Remove the styleObj at *index* from the styles array and return a
    copy.

setExpression( string expression ) : int
    Set expression string where *expression* is a MapServer regular, logical
    or string expression.  Returns MS_SUCCESS or MS_FAILUIRE.
  
setMetaData( string key, string value ) : int
    Insert *value* into the classObj metadata at *key*.  Returns MS_SUCCESS
    or MS_FAILURE.

.. note:: setMetaData() is deprecated and will be removed in a future
          version.  Replaced by direct metadata access, see hashTableObj_.

setText( string text ) : int
    Set text string where *text* is a MapServer text expression. Returns 
    MS_SUCCESS or MS_FAILUIRE.

.. note:: Older versions of MapScript (pre-4.8) featured the an undocumented
          setText() method that required a layerObj be passed as the first 
          argument. That argument was completely bogus and has been removed.    

-----------------------------------------------------------------------------
 colorObj
-----------------------------------------------------------------------------

Since the 4.0 release, MapServer colors are instances of colorObj.  A colorObj
may be a lone object or an attribute of other objects and have no other
associations.

colorObj Attributes
-------------------

blue : int
    Blue component of color in range [0-255]

green : int
    Green component of color in range [0-255]

red : int
    Red component of color in range [0-255]

pen : int
    Don't mess with this unless you know what you are doing! 
    
.. note:: Because of the issue with *pen*, setting colors by individual
   components is unreliable.  Best practice is to use setRGB(), setHex(),
   or assign to a new instance of colorObj().

colorObj Methods
----------------

new colorObj( [ int red=0, int green=0, int blue=0, int pens=-4 ] ) : colorObj_ 
    Create a new instance.  The color arguments are optional.
    
setRGB( int red, int green, int blue ) : int 
    Set all three RGB components.  Returns MS_SUCCESS or MS_FAILURE.
    
setHex( string hexcolor ) : int 
    Set the color to values specified in case-independent hexadecimal
    notation.  Calling setHex('#ffffff') assigns values of 255 to each
    color component.  Returns MS_SUCCESS or MS_FAILURE.
    
toHex() : string 
    Complement to setHex, returning a hexadecimal representation of the
    color components.


-----------------------------------------------------------------------------
 errorObj
-----------------------------------------------------------------------------

This class allows inspection of the MapServer error stack.  Only needed for
the Perl module as the other language modules expose the error stack through
exceptions.

errorObj Attributes
-------------------

code : int
    MapServer error code such as MS_IMGERR (1).

message : string
    Context-dependent error message.

routine : string
    MapServer function in which the error was set.

errorObj Methods
----------------

next : errorObj
    Returns the next error in the stack or NULL if the end has been reached.


-----------------------------------------------------------------------------
 fontSetObj
-----------------------------------------------------------------------------

A fontSetObj is always a 'fontset' attribute of a mapObj_.

fontSetObj Attributes
---------------------

filename : string immutable
    Path to the fontset file on disk.

fonts : hashTableObj_ immutable
    Mapping of fonts.

numfonts : int immutable
    Number of fonts in set.

fontSetObj Methods
------------------

None


-----------------------------------------------------------------------------
 hashTableObj
-----------------------------------------------------------------------------

A hashTableObj is a very simple mapping of case-insensitive string keys to
single string values.  Map, Layer, and Class *metadata* have always been
hash hables and now these are exposed directly.  This is a limited hash
that can contain no more than 41 values.

hashTableObj Attributes
-----------------------

numitems : int immutable
    Number of hash items.

hashTableObj Methods
--------------------

clear( ) : void
    Empties the table of all items.
    
get( string key [, string default=NULL ] ) : string
    Returns the value of the item by its *key*, or *default* if the key
    does not exist.

nextKey( [string key=NULL] ) : string
    Returns the name of the next key or NULL if there is no valid next key.
    If the input *key* is NULL, returns the first key.

remove( string key ) : int
    Removes the hash item by its *key*.  Returns MS_SUCCESS or MS_FAILURE.
    
set( string key, string value ) : int
    Sets a hash item.  Returns MS_SUCCESS or MS_FAILURE.


-----------------------------------------------------------------------------
 imageObj
-----------------------------------------------------------------------------

An image object is a wrapper for GD and GDAL images.

imageObj Attributes
-------------------

format : outputFormatObj_ immutable
    Image format.

height : int immutable
    Image height in pixels.
    
imagepath : string immutable
    If image is drawn by mapObj.draw(), this is the mapObj's web.imagepath.

imageurl : string immutable
    If image is drawn by mapObj.draw(), this is the mapObj's web.imageurl.

renderer : int 
    MS_RENDER_WITH_GD, MS_RENDER_WITH_SWF, MS_RENDER_WITH_RAWDATA,
    MS_RENDER_WITH_PDF, or MS_RENDER_WITH_IMAGEMAP.  Don't mess with this!

size : int
    I don't see where this is used.  Anyone?  --SG

width : int immutable
    Image width in pixels.


imageObj Methods
----------------

new imageObj( int width, int height [, outputFormatObj_ format=NULL [, string filename=NULL ] ] ) : imageObj
    Create new instance of imageObj.  If *filename* is specified, an imageObj
    is created from the file and any specified *width*, *height*, and
    *format* parameters will be overridden by values of the image in 
    *filename*.  Otherwise, if *format* is specified an imageObj is created
    using that format.  See the *format* attribute above for details.  If
    *filename* is not specified, then *width* and *height* should be specified.
    
getBytes() : binary data
    Returns the image contents as a binary buffer.  The exact
    form of this buffer will vary by mapscript language (eg. string in Python,
    byte[] array in Java and C#, unhandled in perl)

save( string filename [, mapObj_ parent_map=NULL ] ) : int
    Save image to *filename*.  The optional *parent_map* parameter must be
    specified if saving GeoTIFF images.

write( [ FILE file=NULL ] ) : int
    Write image data to an open file descriptor or, by default, to *stdout*.
    Returns MS_SUCCESS or MS_FAILURE.
    
.. note:: This method is current enabled for Python and C# only. C# supports writing onto a
   Stream object. User-contributed typemaps are needed for Perl, Ruby, and Java.

.. note:: The free() method of imageObj has been deprecated.  In MapServer
   revisions 4+ all instances of imageObj will be properly disposed of by
   the interpreter's garabage collector.  If the application can't wait 
   for garabage collection, then the instance can simply be deleted or
   undef'd.


-----------------------------------------------------------------------------
 intarray
-----------------------------------------------------------------------------

An intarray is a utility class generated by SWIG useful for manipulating
map layer drawing order.  See mapObj::getLayersDrawingOrder for discussion
of mapscript use and see http://www.swig.org/Doc1.3/Library.html#Library_nn5
for a complete reference.

intarray Attributes
-------------------

None

intarray Methods
----------------

new intarray( int numitems ) : intarray
    Returns a new instance of the specified length.

    
-----------------------------------------------------------------------------
 labelCacheMemberObj
-----------------------------------------------------------------------------

An individual feature label.  The labelCacheMemberObj class is associated
with labelCacheObj.

::

    +------------------+ 0..*     1 +------------+
    | LabelCacheMember | <--------- | LabelCache |
    +------------------+            +------------+
    

labelCacheMemberObj Attributes
------------------------------

classindex : int immutable
    Index of the class of the labeled feature.
    
featuresize : float immutable
    **TODO**

label : labelObj_ immutable
    Copied from the class of the labeled feature.
 
layerindex : int immutable
    The index of the layer of the labeled feature.
    
numstyles : int immutable
    Number of styles as for the class of the labeled feature.

point : pointObj_ immutable
    Label point.

poly : shapeObj_ immutable
    Label bounding box.
    
shapeindex : int immutable
    Index within shapefile of the labeled feature.
 
status : int immutable
    Has the label been drawn or not?

styles : styleObj_ immutable
    **TODO** this should be protected from SWIG.
    
text : string immutable
    Label text.

tileindex : int immutable
    Tileindex of the layer of the labeled feature.
    
labelCacheMemberObj Methods
---------------------------

None.

.. note::
   No real scripting control over labeling currently, but there may be
   some interesting new possibilities if users have control over labeling
   text, position, and status.


-----------------------------------------------------------------------------
 labelCacheObj
-----------------------------------------------------------------------------

Set of a map's cached labels.  Has no other existence other than as a
'labelcache' attribute of a mapObj.  Associated with labelCacheMemberObj and
markerCacheMemberObj.

::

    +------------+ 1     0..* +-------------------+
    | LabelCache | ---------> | LabelCacheMember  |
    +------------+            + ----------------- +
                              | MarkerCacheMember |
                              +-------------------+

labelCacheObj Attributes
------------------------

cachesize : int immutable
    **TODO**

markercachesize : int immutable
    **TODO**
    
numlabels : int immutable
    Number of label members.

nummarkers : int immutable
    Number of marker members.

labelCacheObj Methods
---------------------

freeCache( ) : void
    Free the labelcache.


-----------------------------------------------------------------------------
 labelObj
-----------------------------------------------------------------------------

A labelObj is associated with a classObj, a scalebarObj, or a legendObj.

::

    +-------+ 0..1     1 +----------+
    | Label | <--------- | Class    |
    +-------+            | -------- |
                         | Scalebar |
                         | -------- |
                         | Legend   |
                         +----------+ 
                           
labelObj Attributes
-------------------

angle : float
    **TODO**

antialias : int
    MS_TRUE or MS_FALSE

autoangle : int
    MS_TRUE or MS_FALSE
    
autofollow : int
    MS_TRUE or MS_FALSE. Tells mapserver to compute a curved label
    for appropriate linear features (see RFC 11 for specifics).   

autominfeaturesize: int
    MS_TRUE or MS_FALSE

backgroundcolor : colorObj_
    Color of background rectangle or billboard.

backgroundshadowcolor : colorObj_
    Color of background rectangle or billboard shadow.

backgroundshadowsizex : int
    Horizontal offset of drop shadow in pixels.

backgroundshadowsizey : int
    Vertical offset of drop shadow in pixels.

buffer : int
    Maybe this should've been named 'padding' since that's what it is:
    padding in pixels around a label.

color : colorObj_
    Foreground color.
    
encoding : string
    Supported encoding format to be used for labels.
    If the format is not supported, the label will not be drawn.
    Requires the iconv library (present on most systems).
    The library is always detected if present on the system,
    but if not the label will not be drawn.
    Required for displaying international characters in MapServer.
    More information can be found at:
    http://www.foss4g.org/FOSS4G/MAPSERVER/mpsnf-i18n-en.html.
    
font : string
    Name of TrueType font.

force : int
    MS_TRUE or MS_FALSE.

maxsize : int
    Maximum height in pixels for scaled labels.  See symbolscale attribute
    of layerObj_.

mindistance : int
    Minimum distance in pixels between duplicate labels.
    
minfeaturesize : int
    Features of this size of greater will be labeled.
    
minsize : int
    Minimum height in pixels.

offsetx : int
    Horizontal offset of label.

offsety : int
    Vertical offset of label.

outlinecolor : colorObj_
    Color of one point outline.

partials : int
    MS_TRUE (default) or MS_FALSE.  Whether or not labels can flow past
    the map edges.
    
position : int
    MS_UL, MS_UC, MS_UR, MS_CL, MS_CC, MS_CR, MS_LL, MS_LC, MS_LR, or
    MS_AUTO.

shadowcolor : colorObj_
    Color of drop shadow.

shadowsizex : int
    Horizontal offset of drop shadow in pixels.

shadowsizey : int
    Vertical offset of drop shadow in pixels.

size : int
    Annotation height in pixels.

type : int
    MS_BITMAP or MS_TRUETYPE.

wrap : string
    Character on which legend text will be broken to make multi-line
    legends.
   
labelObj Methods
----------------

None

-----------------------------------------------------------------------------
 layerObj
-----------------------------------------------------------------------------

A layerObj is associated with mapObj.  In the most recent revision, an
intance of layerObj can exist outside of a mapObj.

::

    +-------+ 0..*  0..1 +-----+
    | Layer | <--------> | Map |
    +-------+            +-----+
   
The other important association for layerObj is with classObj_

::

    +-------+ 1     0..* +-------+
    | Layer | <--------> | Class |
    +-------+            +-------+

and hashTableObj_

::

    +-------+ 1        1 +-----------+
    | Layer | ---------> | HashTable |
    +-------+            |    --     |
                         | metadata  |
                         +-----------+


layerObj Attributes
-------------------

bandsitem : string
    The attribute from the index file used to select the source
    raster band(s) to be used.  Normally NULL for default bands processing.

classitem : string
    The attribute used to classify layer data.
   
connection : string
    Layer connection or DSN.

connectiontype : int
    See MS_CONNECTION_TYPE in mapserver.h for possible values.

data : string
    Layer data definition, values depend upon connectiontype.
  
debug : int
    Enable debugging of layer.  MS_ON or MS_OFF (default).
    
dump : int
    Switch to allow mapserver to return data in GML format.  MS_TRUE or
    MS_FALSE.  Default is MS_FALSE.

extent : rectObj_
    optional limiting extent for layer features.
    
filteritem : string
    Attribute defining filter.
    
footer : string
    **TODO**
    
group : string
    Name of a group of layers.
    
header : string
    **TODO**
    
index : int immutable
    Index of layer within parent map's layers array.
   
labelangleitem : string
    Attribute defining label angle.

labelcache : int
    MS_ON or MS_OFF.  Default is MS_ON.

labelitem : string
    Attribute defining feature label text.

labelmaxscale : float
    Maximum scale at which layer will be labeled.

labelminscale : float
    Minimum scale at which layer will be labeled.

labelrequires : string
    Logical expression.

labelsizeitem : string
    Attribute defining label size.
    
map : mapObj_ immutable
    Reference to parent map.
  
maxfeatures : int
    Maximum number of layer features that will be drawn.  For shapefile data
    this means the first N features where N = maxfeatures.
    
maxscale : float
    Maximum scale at which layer will be drawn.

metadata : hashTableObj_ immutable
    Layer metadata.
    
minscale : float
    Minimum scale at which layer will be drawn.

name : string
    Unique identifier for layer.
    
numclasses : int immutable
    Number of layer classes.

numitems : int immutable
    Number of layer feature attributes (items).

numjoins : int immutable
    Number of layer joins.
    
numprocessing : int immutable
    Number of raster processing directives.

offsite : colorObj_
    transparent pixel value for raster layers.
    
postlabelcache : int
    MS_TRUE or MS_FALSE.  Default is MS_FALSE.
   
requires : string
    Logical expression.
    
sizeunits : int
    Units of class size values. MS_INCHES, MS_FEET, MS_MILES, MS_METERS, MS_KILOMETERS, MS_DD or MS_PIXELS

status : int
    MS_ON, MS_OFF, or MS_DEFAULT.
  
styleitem : string
    Attribute defining styles.

symbolscale : float
    Scale at which symbols are default size.

template : string
    Template file.  Note that for historical reasons, the query attribute
    must be non-NULL for a layer to be queryable.
  
tileindex : string
    Layer index file for tiling support.

tileitem : string
    Attribute defining tile paths.
    
tolerance : float
    Search buffer for point and line queries.

toleranceunits : int
    MS_INCHES, MS_FEET, MS_MILES, MS_METERS, MS_KILOMETERS, MS_DD or MS_PIXELS

transform : int
    Whether or not layer data is to be transformed to image units.  
    MS_TRUE or MS_FALSE.  Default is MS_TRUE.  Case of MS_FALSE is for
    data that are in image coordinates such as annotation points.
   
transparency : int
    Layer opacity percentage in range [0, 100].  The special value of 
    MS_GD_ALPHA (1000) indicates that the alpha transparency of pixmap
    symbols should be honored, and should be used only for layers that use
    RGBA pixmap symbols. 
    
type : int
    See MS_LAYER_TYPE in mapserver.h.
    
units : int
    Units of the layer.  See MS_UNITS in mapserver.h.

layerObj Methods
----------------

new layerObj( [ mapObj_ parent_map=NULL ] ) : layerObj
    Create a new layerObj in *parent_map*.  The layer index of the new layerObj
    will be equal to the *parent_map* numlayers - 1.  The *parent_map* arg is
    now optional and Layers can exist outside of a Map.
    
addFeature( shapeObj_ shape ) : int 
    Add a new inline feature on a layer.  Returns -1 on error. 
    **TODO**: Is this similar to inline features in a mapfile?  Does it work
    for any kind of layer or connection type? 
    
addProcessing( string directive ) : void
    Adds a new processing directive line to a layer, similar to the PROCESSING
    directive in a map file.  Processing directives supported are specific to
    the layer type and underlying renderer. 

applySLD( string sld, string stylelayer ) : int 
    Apply the SLD document to the layer object. 
    The matching between the sld document and the layer will be done 
    using the layer's name.
    If a namedlayer argument is passed (argument is optional), 
    the NamedLayer in the sld that matchs it will be used to style 
    the layer. See SLD HOWTO for more information on the SLD support.

applySLDURL( string sld, string stylelayer ) : int
    Apply the SLD document pointed by the URL to the layer object. The 
    matching between the sld document and the layer will be done using 
    the layer's name.
    If a namedlayer argument is passed (argument is optional), 
    the NamedLayer in the sld that matchs it will be used to style 
    the layer.
    See SLD HOWTO for more information on the SLD support.

clearProcessing() : int
    Clears the layer's raster processing directives.  Returns the subsequent
    number of  directives, which will equal MS_SUCCESS if the directives have
    been cleared.

clone() : layerObj
    Return an independent copy of the layer with no parent map.
    
close() : void
    Close the underlying layer.

.. note:: demote() is removed in MapServer 4.4

draw( mapObj_ map, imageObj_ image ) : int
    Renders this layer into the target image, adding labels to the cache if
    required.  Returns MS_SUCCESS or MS_FAILURE. 
    **TODO**: Does the map need to be the map on which the layer is defined?  
    I suspect so.  

drawQuery( mapObj_ map, imageObj_ image ) : 
    Draw query map for a single layer into the target image.  Returns
    MS_SUCCESS or MS_FAILURE.

executeWFSGetFeature( layer ) : string
    Executes a GetFeature request on a WFS layer and returns the
    name of the temporary GML file created. Returns an empty
    string on error.

generateSLD() : void
    Returns an SLD XML string based on all the classes found in the layers.

getClass( int i ) : classObj_
    Fetch the requested class object.  Returns NULL if the class index is
    out of the legal range.   The numclasses field contains the number of
    classes available, and the first class is index 0.

getExtent() : rectObj_
    Fetches the extents of the data in the layer.  This normally requires a
    full read pass through the features of the layer and does not work for
    raster layers.  

getFeature( int shapeindex [, int tileindex=-1 ] ) : shapeObj_
    Return the layer feature at *shapeindex* and *tileindex*.

getFilterString() : string
    Returns the current filter expression. 

getFirstMetaDataKey() : string
    Returns the first key in the metadata hash table.  With
    getNextMetaDataKey(), provides an opaque iterator over keys.

getItem( int i ) : string
    Returns the requested item.  Items are attribute fields, and this method
    returns the item name (field name).   The numitems field contains the 
    number of items available, and the first item is index zero.
    
getMetaData( string key ) : string
    Return the value at *key* from the metadata hash table.

getNextMetaDataKey( string lastkey ) : string
    Returns the next key in the metadata hash table or NULL if
    *lastkey* is the last valid key.  If *lastkey* is NULL, returns the
    first key of the metadata hash table.

.. note:: getFirstMetaDataKey(), getMetaData(), and getNextMetaDataKey()
          are deprecated and will be removed in a future version.  Replaced
          by direct metadata access, see hashTableObj_.

getNumFeatures() : int
    Returns the number of inline features in a layer.  **TODO**: is this
    really only online features or will it return the number of non-inline
    features on a regular layer? 

getNumResults() : int
    Returns the number of entries in the query result cache for this layer.

getProcessing( int index) : string
    Return the raster processing directive at *index*.
    
getProjection( ) : string
    Returns the PROJ.4 definition of the layer's projection.

getResult( int i ) : resultCacheMemberObj_ 
    Fetches the requested query result cache entry, or NULL if the index is
    outside the range of available results.  This method would normally only
    be used after issuing a query operation.

.. note:: getNumResults() and getResult() are deprecated in MapServer 4.4.
          Users should instead use the new querying API described in 
          querying-HOWTO.txt.  layerObj::getResults() is the entry point for
          the new API.

getResults() : resultCacheObj_
    Returns a reference to layer's result cache.  Should be NULL prior to
    any query, or after a failed query or query with no results.

getShape( shapeObj_ shape, int tileindex, int shapeindex ) : int
    Get a shape from layer data.

.. note:: getShape() is deprecated.  Users should adopt getFeature() for new
          applications.
          
getWMSFeatureInfoURL( mapObj_ map, int click_x, int click_y, int feature_count, string info_format ) : string
    Return a WMS GetFeatureInfo URL (works only for WMS layers)
    clickX, clickY is the location of to query in pixel coordinates
    with (0,0) at the top left of the image.
    featureCount is the number of results to return.
    infoFormat is the format the format in which the result should be
    requested.  Depends on remote server's capabilities.  MapServer
    WMS servers support only "MIME" (and should support "GML.1" soon).
    Returns "" and outputs a warning if layer is not a WMS layer 
    or if it is not queriable.
    
insertClass( classObj_ class [, int index=-1 ] ) : int
    Insert a *copy* of the class into the layer at the requested *index*.
    Default index of -1 means insertion at the end of the array of classes.
    Returns the index at which the class was inserted.

isVisible( ) : int
    Returns MS_TRUE or MS_FALSE after considering the layer status, minscale,
    and maxscale within the context of the parent map.

moveClassDown( int class ) : int 
    The class specified by the class index will be moved up into
    the array of layers. Returns MS_SUCCESS or MS_FAILURE.
    ex. moveClassDown(1) will have the effect of moving class 1
    down to postion 2, and the class at position 2 will be moved
    to position 1.

moveClassUp( int class ) : int 
    The class specified by the class index will be moved up into
    the array of layers. Returns MS_SUCCESS or MS_FAILURE.
    ex. moveClassUp(1) will have the effect of moving class 1
    up to postion 0, and the class at position 0 will be moved
    to position 1.

nextShape( ) : shapeObj_
    Called after msWhichShapes has been called to actually retrieve shapes 
    within a given area returns a shape object or MS_FALSE
    
    example of usage :

::

           mapObj map = new mapObj("d:/msapps/gmap-ms40/htdocs/gmap75.map");
           layerObj layer = map.getLayerByName('road');
           int status = layer.open();
           status = layer.whichShapes(map.extent);
           shapeObj shape;
           while ((shape = layer.nextShape()) != null) 
           {
             ...
           }
           layer.close();

open() : void
    Opens the underlying layer.  This is required before operations like
    getFeature() will work, but is not required before a draw or query call.

.. note:: promote() is eliminated in MapServer 4.4.

queryByAttributes( mapObj_ map, string qitem, string qstring, int mode ) : int
    Query layer for shapes that intersect current map extents.  qitem is the 
    item (attribute) on which the query is performed, and qstring is the 
    expression to match.  The query is performed on all the shapes that are 
    part of a CLASS that contains a TEMPLATE value or that match any class in a
    layer that contains a LAYER TEMPLATE value.  

    Note that the layer's FILTER/FILTERITEM are ignored by this function.
    Mode is MS_SINGLE or MS_MULTIPLE depending on number of results you want. 
    Returns MS_SUCCESS if shapes were found or MS_FAILURE if nothing
    was found or if some other error happened.

queryByFeatures( mapObj_ map, int slayer ) : int 
    Perform a query set based on a previous set of results from
    another layer. At present the results MUST be based on a polygon
    layer.
    Returns MS_SUCCESS if shapes were found or MS_FAILURE if nothing
    was found or if some other error happened

queryByIndex( mapObj_ map, int shapeindex, int tileindex [, int bAddToQuery=MS_FALSE ]) : int
    Pop a query result member into the layer's result cache.  By default
    clobbers existing cache.  Returns MS_SUCCESS or MS_FAILURE.

queryByPoint( mapObj_ map, pointObj_ point, int mode, float buffer ) : int
    Query layer at point location specified in georeferenced map 
    coordinates (i.e. not pixels).  
    The query is performed on all the shapes that are part of a CLASS 
    that contains a TEMPLATE value or that match any class in a
    layer that contains a LAYER TEMPLATE value.
    Mode is MS_SINGLE or MS_MULTIPLE depending on number of results
    you want. 
    Passing buffer <=0 defaults to tolerances set in the map file 
    (in pixels) but you can use a constant buffer (specified in 
    ground units) instead.
    Returns MS_SUCCESS if shapes were found or MS_FAILURE if nothing
    was found or if some other error happened.

queryByRect( mapObj_ map, rectObj_ rect ) : int
    Query layer using a rectangle specified in georeferenced map 
    coordinates (i.e. not pixels).
    The query is performed on all the shapes that are part of a CLASS 
    that contains a TEMPLATE value or that match any class in a
    layer that contains a LAYER TEMPLATE value.
    Returns MS_SUCCESS if shapes were found or MS_FAILURE if nothing
    was found or if some other error happened.

queryByShape( mapObj_ map, shapeObj_ shape ) : int
    Query layer based on a single shape, the shape has to be a polygon
    at this point. 
    Returns MS_SUCCESS if shapes were found or MS_FAILURE if nothing
    was found or if some other error happened 

removeClass( int index ) : classObj_
    Removes the class indicated and returns a copy, or NULL in the case
    of a failure.  Note that subsequent classes will be renumbered by this
    operation.  The numclasses field contains the number of classes available.

removeMetaData( string key ) : int
    Delete the metadata hash at *key*.  Returns MS_SUCCESS or
    MS_FAILURE.

.. note:: removeMetaData() is deprecated and will be removed in a future
          version.  Replaced by direct metadata access, see hashTableObj_.

setExtent( float minx, float miny, float maxx, float maxy ) : int
    Sets the extent of a layer.  Returns MS_SUCCESS or MS_FAILURE.
    
setFilter( string filter ) : int 
    Sets a filter expression similarly to the FILTER expression in a map 
    file.  Returns MS_SUCCESS on success or MS_FAILURE if the expression
    fails to parse. 

setMetaData( string key, string value ) : int
    Assign *value* to the metadata hash at *key*.  Return MS_SUCCESS
    or MS_FAILURE.

.. note:: setMetaData() is deprecated and will be removed in a future
          version.  Replaced by direct metadata access, see hashTableObj_.

setProcessingKey( string key, string value ) : void
    Adds or replaces a processing directive of the form "key=value".  Unlike
    the addProcessing() call, this will replace an existing processing
    directive for the given key value.  Processing directives supported are 
    specific to the layer type and underlying renderer. 

setProjection( string proj4 ) : int
    Set the layer projection using a PROJ.4 format projection definition 
    (ie. "+proj=utm +zone=11 +datum=WGS84" or "init=EPSG:26911").  Returns 
    MS_SUCCESS or MS_FAILURE. 

setWKTProjection( string wkt ) : int
    Set the layer projection using OpenGIS Well Known Text format.  Returns
    MS_SUCCESS or MS_FAILURE.

int whichShapes( rectObj_ rect ) : int
    Performs a spatial, and optionally an attribute based feature search. 
    The function basically prepares things so that candidate features can be 
    accessed by query or drawing functions (eg using nextShape function).
    Returns MS_SUCCESS or MS_FAILURE.

-----------------------------------------------------------------------------
 legendObj
-----------------------------------------------------------------------------

legendObj is associated with mapObj_

::

     +--------+ 0..1     1 +-----+
     | Legend | <--------> | Map |
     +--------+            +-----+

and with labelObj_.

::

     +--------+ 1        1 +-------+
     | Legend | ---------> | Label |
     +--------+            +-------+

legendObj Attributes
--------------------

height : int
    Legend height.
    
imagecolor : colorObj_
    Legend background color.

keysizex : int
    Width in pixels of legend keys.

keysizey : int
    Pixels.

keyspacingx : int
    Horizontal padding around keys in pixels.

keyspacingy : int
    Vertical padding.

label : labelObj_ immutable
    legend label.

map : mapObj_ immutable
    Reference to parent mapObj.
    
outlinecolor : colorObj_
    key outline color.

position : int
    MS_UL, MS_UC, MS_UR, MS_LL, MS_LC, or MS_LR.

postlabelcache : int
    MS_TRUE or MS_FALSE.

status : int
    MS_ON, MS_OFF, or MS_EMBED.

template : string
    Path to template file.

width : int
    Label width.

legendObj Methods
-----------------

None


-----------------------------------------------------------------------------
 lineObj
-----------------------------------------------------------------------------

A lineObj is composed of one or more pointObj_ instances.

::

    +------+ 0..1  1..* +-------+
    | Line | ---------> | Point |
    +------+            +-------+

lineObj Attributes
------------------

numpoints : int immutable
    Number of points in the line.

lineObj Methods
---------------

add(pointObj_ point) : int
    Add *point* to the line.  Returns MS_SUCCESS or MS_FAILURE.

get(int index) : pointObj_
    Return reference to point at *index*.

project(projectionObj_ proj_in, projectionObj_ proj_out) : int
    Transform line in place from *proj_in* to *proj_out*.  Returns
    MS_SUCCESS or MS_FAILURE.

set(int index, pointObj_ point) : int
    Set the point at *index* to *point*.  Returns MS_SUCCESS or MS_FAILURE.

-----------------------------------------------------------------------------
 mapObj
-----------------------------------------------------------------------------

A mapObj is primarily associated with instances of layerObj_.

::

     +-----+ 0..1  0..* +-------+
     | Map | <--------> | Layer |
     +-----+            +-------+

Secondary associations are with legendObj_, scalebarObj_, referenceMapObj_,

::

     +-----+ 1     0..1 +--------------+
     | Map | ---------> | Legend       |
     +-----+            | ------------ |
                        | Scalebar     |
                        | ------------ |
                        | ReferenceMap |
                        +--------------+ 

outputFormatObj_.

::

     +-----+ 1     1..* +--------------+
     | Map | ---------> | OutputFormat |
     +-----+            +------------- + 
                           

mapObj Attributes
-----------------

cellsize : float
    Pixel size in map units.

configoptions : hashObj immutable
    A hash table of configuration options from CONFIG keywords in the .map. 
    Direct access to config options is discouraged.  Use the setConfigOption()
    and getConfigOption() methods instead.
    
datapattern : string
    **TODO** not sure this is meaningful for mapscript. 
    
debug : int
    MS_TRUE or MS_FALSE.

extent : rectObj_
    Map's spatial extent.
    
fontset : fontSetObj_ immutable
    The map's defined fonts.

height : int
    Map's output image height in pixels.

.. note:: direct setting of *height* is deprecated in MapServer version 4.4.
   Users should set width and height simultaneously using setSize().
   
imagecolor : colorObj_
    Initial map background color.
    
imagequality : int
    JPEG image quality.

.. note:: map imagequality is deprecated in MapServer 4.4 and should
          instead be managed through map outputformats.
          
imagetype : string immutable
    Name of the current output format.
    
interlace : int
    Output image interlacing.

.. note:: map interlace is deprecated in MapServer 4.4 and should
          instead be managed through map outputformats.

lablecache : labelCacheObj_ immutable
    Map's labelcache.

legend : legendObj_ immutable
    Reference to map's legend.

mappath : string
    Filesystem path of the map's mapfile.
    
maxsize : int
    **TODO** ?
    
name : string
    Unique identifier.

numlayers : int immutable
    Number of map layers.

numoutputformats : int
    Number of output formats.

outputformat : outputFormatObj_
    The currently selected output format.

.. note:: Map outputformat should not be modified directly.  Use the
          selectOutputFormat() method to select named formats.
          
outputformatlist : outputFormatObj[]
    Array of the available output formats.

.. note:: Currently only available for C#. A proper typemaps should be
          implemented for the other languages.
   
querymap : queryMapObj immutable
    **TODO** should this be exposed to mapscript?

reference : referenceMapObj_ immutable
    Reference to reference map.
    
resolution : float
    Nominal DPI resolution.  Default is 72.
    
scale : float
    The nominal map scale.  A value of 25000 means 1:25000 scale.

scalebar : scalebarObj_ immutable
    Reference to the scale bar.
    
shapepath : string
    Base filesystem path to layer data.  
    
status : int
    MS_OFF, MS_ON, or MS_DEFAULT.

symbolset : symbolSetObj_ immutable
    The map's set of symbols.

templatepattern : string
    **TODO** not sure this is meaningful for mapscript. 

transparent : int
    MS_TRUE or MS_FALSE.

.. note:: map transparent is deprecated in MapServer 4.4 and should
          instead be managed through map outputformats.

units : int
    MS_DD, MS_METERS, etc.
   
web : webObj_ immutable
    Reference to map's web definitions.
    
width : int
    Map's output image width in pixels.

.. note:: direct setting of *width* is deprecated in MapServer version 4.4.
   Users should set width and height simultaneously using setSize().
   
mapObj Methods
--------------

new mapObj( [ string filename='' ] ) : mapObj
    Create a new instance of mapObj.  Note that the filename is now optional.
  
appendOutputFormat( outputFormatObj_ format ) : int
    Attach *format* to the map's output format list.  Returns the updated
    number of output formats.

applyConfigOptions( ) : void
    Apply the defined configuration options set by setConfigOption().

applySLD( string sldxml ) : int
    Parse the SLD XML string *sldxml* and apply to map layers.  Returns
    MS_SUCCESS or MS_FAILURE.

applySLDURL( string sldurl ) : int
    Fetch SLD XML from the URL *sldurl* and apply to map layers.  Returns
    MS_SUCCESS or MS_FAILURE.
    
clone( ) : mapObj
    Returns a independent copy of the map, less any caches.

    .. note:: In the Java module this method is named 'cloneMap'.

draw( ) : imageObj_
    Draw the map, processing layers according to their defined order and
    status.  Return an imageObj.

drawLabelCache( imageObj_ image ) : int
    Draw map's label cache on *image*.  Returns MS_SUCCESS or MS_FAILURE.

drawLegend( ) : imageObj_
    Draw map legend, returning an imageObj.
    
drawQuery( ) : imageObj_
    Draw query map, returning an imageObj.
    
drawReferenceMap( ) : imageObj_
    Draw reference map, returning an imageObj.

drawScalebar( ) : imageObj_
    Draw scale bar, returning an imageObj.

embedLegend( imageObj_ image ) : int
    Embed map's legend in *image*.  Returns MS_SUCCESS or MS_FAILURE.
    
embedScalebar( imageObj_ image ) : int
    Embed map's scalebar in *image*.  Returns MS_SUCCESS or MS_FAILURE.

freeQuery( [ int qlayer=-1 ] ) : void
    Clear layer query result caches.  Default is -1, or *all* layers.
    
generateSLD( ) : string
    Return SLD XML as a string for map layers.
    
getConfigOption( string key ) : string
    Fetches the value of the requested configuration key if set.  Returns
    NULL if the key is not set.  

getFirstMetaDataKey( ) : string
    Returns the first key in the web.metadata hash table.  With
    getNextMetaDataKey( ), provides an opaque iterator over keys.
    
getLayer( int index ) : layerObj_
    Returns a reference to the layer at *index*.

getLayerByName( string name ) : layerObj_
    Returns a reference to the named layer.
   
getLayersDrawingOrder( ) : int*
    Returns an array of layer indexes in drawing order.

.. note::
   Unless the proper typemap is implemented for the module's language
   a user is more likely to get back an unuseable SWIG pointer to the
   integer array.

getMetaData( string key ) : string
    Return the value at *key* from the web.metadata hash table.

getNextMetaDataKey( string lastkey ) : string
    Returns the next key in the web.metadata hash table or NULL if
    *lastkey* is the last valid key.  If *lastkey* is NULL, returns the
    first key of the metadata hash table.
    
getNumSymbols( ) : int
    Return the number of symbols in map.

getOutputFormatByName( string imagetype ) : outputFormatObj_
    Return the output format corresponding to driver name *imagetype* or
    to format name *imagetype*.  This works exactly the same as the
    IMAGETYPE directive in a mapfile, is case insensitive and allows 
    an output format to be found either by driver (like 'GD/PNG') or
    name (like 'PNG24').

getProjection( ) : string
    Returns the PROJ.4 definition of the map's projection.

getSymbolByName( string name ) : int
    Return the index of the named symbol in the map's symbolset.

.. note::
   This method is poorly named and too indirect.  It is preferrable to use
   the getSymbolByName method of symbolSetObj, which really does return a
   symbolObj reference, or use the index method of symbolSetObj to get a
   symbol's index number.

insertLayer( layerObj layer [, int nIndex=-1 ] ) : int
    Insert a copy of *layer* into the Map at index *nIndex*.  The default
    value of *nIndex* is -1, which means the last possible index.  Returns
    the index of the new Layer, or -1 in the case of a failure.

loadMapContext( string filename [, int useUniqueNames=MS_FALSE ] ) : int
    Load an OGC map context file to define extents and layers of a map.

loadOWSParameters( OWSRequest_ request [, string version='1.1.1' ] ) : int
    Load OWS request parameters (BBOX, LAYERS, &c.) into map.  Returns
    MS_SUCCESS or MS_FAILURE.

loadQuery( string filename ) : int
    Load a saved query.  Returns MS_SUCCESS or MS_FAILURE.
    
moveLayerDown( int layerindex ) : int
    Move the layer at *layerindex* down in the drawing order array, meaning
    that it is drawn later.  Returns MS_SUCCESS or MS_FAILURE.
    
moveLayerUp( int layerindex ) : int
    Move the layer at *layerindex* up in the drawing order array, meaning
    that it is drawn earlier.  Returns MS_SUCCESS or MS_FAILURE.
    
nextLabel( ) : labelCacheMemberObj_
    Return the next label from the map's labelcache, allowing iteration
    over labels.

.. note:: nextLabel() is deprecated and will be removed 
          in a future version. Replaced by getLabel().

getLabel( int labelindex ) : labelCacheMemberObj_
    Return label at specified index from the map's labelcache.

OWSDispatch( OWSRequest req ) : int
    Processes and executes the passed OpenGIS Web Services request on the 
    map.  Returns MS_DONE (2) if there is no valid OWS request in the req 
    object, MS_SUCCESS (0) if an OWS request was successfully processed and
    MS_FAILURE (1) if an OWS request was not successfully processed.  OWS
    requests include WMS, WFS, WCS and SOS requests supported by MapServer. 
    Results of a dispatched request are written to stdout and can be captured
    using the msIO services (ie. msIO_installStdoutToBuffer() and 
    msIO_getStdoutBufferString())

prepareImage( ) : imageObj_
    Returns an imageObj initialized to map extents and outputformat.
    
prepareQuery( ) : void
    **TODO** this function only calculates the scale or am I missing
    something?
  
processLegendTemplate( string names[], string values[], int numitems ) : string
    Process MapServer legend template and return HTML.

processQueryTemplate( string names[], string values[], int numitems ) : string
    Process MapServer query template and return HTML.

processTemplate( int generateimages, string names[], string values[], int numitems ) : string
    Process MapServer template and return HTML.

.. note::
   None of the three template processing methods will be useable unless
   the proper typemaps are implemented in the module for the target
   language.  Currently the typemaps are not implemented.
    
queryByFeatures( int layerindex ) : int
    Query map layers, result sets contain features that intersect or are
    contained within the features in the result set of the MS_LAYER_POLYGON
    type layer at *layerindex*.  Returns MS_SUCCESS or MS_FAILURE.

queryByPoint( pointObj_ point, int mode, float buffer ) : int
    Query map layers, result sets contain one or more features, depending
    on *mode*, that intersect *point* within a tolerance *buffer*.
    Returns MS_SUCCESS or MS_FAILURE.

queryByRect( rectObj_ rect ) : int
    Query map layers, result sets contain features that intersect or are
    contained within *rect*.  Returns MS_SUCCESS or MS_FAILURE.
   
queryByShape( shapeObj_ shape ) : int
    Query map layers, result sets contain features that intersect or are
    contained within *shape*.  Returns MS_SUCCESS or MS_FAILURE.

removeLayer( int index ) : int
    Remove the layer at *index*.
    
removeMetaData( string key ) : int
    Delete the web.metadata hash at *key*.  Returns MS_SUCCESS or
    MS_FAILURE.

removeOutputFormat( string name ) : int
    Removes the format named *name* from the map's output format list.
    Returns MS_SUCCESS or MS_FAILURE.

save( string filename ) : int
    Save map to disk as a new map file.  Returns MS_SUCCESS
    or MS_FAILURE.

saveMapContext( string filename ) : int
    Save map definition to disk as OGC-compliant XML.  Returns MS_SUCCESS
    or MS_FAILURE.
    
saveQuery( string filename ) : int
    Save query to disk.  Returns MS_SUCCESS or MS_FAILURE.
    
saveQueryAsGML( string filename ) : int
    Save query to disk.  Returns MS_SUCCESS or MS_FAILURE.
   
selectOutputFormat( string imagetype ) : void
    Set the map's active output format to the internal format named
    *imagetype*.  Built-in formats are "PNG", "PNG24", "JPEG", "GIF",
    "GTIFF".

setConfigOption( string key, string value ) : void
    Set the indicated key configuration option to the indicated value.  
    Equivalent to including a CONFIG keyword in a map file. 

setExtent( float minx, float miny, float miny, float maxy ) : int
    Set the map extent, returns MS_SUCCESS or MS_FAILURE.
    
setFontSet( string filename ) : int
    Load fonts defined in *filename* into map fontset.  The existing
    fontset is cleared.  Returns MS_SUCCESS or MS_FAILURE.
    
setImageType( string name ) : void
    Sets map outputformat to the named format.
  
.. note:: setImageType() remains in the module but it's use is
          deprecated in favor of selectOutputFormat().

setLayersDrawingOrder( int layerindexes[]) : int
    Set map layer drawing order.

.. note::
   Unless the proper typemap is implemented for the module's language
   users will not be able to pass arrays or lists to this method and
   it will be unusable.

setMetaData( string key, string value ) : int
    Assign *value* to the web.metadata hash at *key*.  Return MS_SUCCESS
    or MS_FAILURE.

setOutputFormat( outputFormatObj_ format ) : void
    Sets map outputformat.
    
setProjection( string proj4 ) : int
    Set map projection from PROJ.4 definition string *proj4*.

setRotation( float rotation_angle ) : int
    Set map rotation angle. The map view rectangle (specified in 
    EXTENTS) will be rotated by the indicated angle in the counter-
    clockwise direction. Note that this implies the rendered map 
    will be rotated by the angle in the clockwise direction.
    Returns MS_SUCCESS or MS_FAILURE.

setSize( int width, int height ) : int
    Set map's image width and height together and carry out the necessary
    subsequent geotransform computation.  Returns MS_SUCCESS or MS_FAILURE.
   
setSymbolSet( string filename ) : int
    Load symbols defined in *filename* into map symbolset.  The existing
    symbolset is cleared.  Returns MS_SUCCESS or MS_FAILURE.
    
setWKTProjection( string wkt ) : int
    Sets map projection from OGC definition *wkt*.
   
zoomPoint( int zoomfactor, pointObj_ imgpoint, int width, int height, rectObj_ extent, rectObj_ maxextent ) : int
    Zoom by *zoomfactor* to *imgpoint* in pixel units within the image of
    *height* and *width* dimensions and georeferenced *extent*.  Zooming
    can be constrained to a maximum *maxextent*.  Returns MS_SUCCESS or
    MS_FAILURE.

zoomRectangle( rectObj_ imgrect, int width, int height, rectObj_ extent, rectObj_ maxextent ) : int
    Zoom to a pixel coordinate rectangle in the image of *width* and *height*
    dimensions and georeferencing *extent*.  Zooming can be constrained to a
    maximum *maxextent*.  Returns MS_SUCCESS or MS_FAILURE.

zoomScale( float scale, pointObj_ imgpoint, int width, int height, rectObj_ extent, rectObj_ maxextent) : int
    Like the previous methods, but zooms to the point at a specified scale.


-----------------------------------------------------------------------------
 markerCacheMemberObj
-----------------------------------------------------------------------------

An individual marker.  The markerCacheMemberObj class is associated
with labelCacheObj.

::

    +------------------+ 0..*     1 +------------+
    | MarkerCacheMember | <--------- | LabelCache |
    +------------------+            +------------+
    

markerCacheMemberObj Attributes
--------------------------------

id : int immutable
    Id of the marker.

poly : shapeObj_ immutable
    Marker bounding box.

markerCacheMemberObj Methods
-----------------------------

None.


-----------------------------------------------------------------------------
 outputFormatObj
-----------------------------------------------------------------------------

An outputFormatObj is associated with a mapObj_ 

::

     +--------------+ 1..*     1 +-----+
     | OutputFormat | <--------- | Map |
     +--------------+            +-----+ 

and can also be an attribute of an imageObj_.

outputFormatObj Attributes
--------------------------

bands : int
    The number of bands in the raster.  Only used for the "raw" modes, 
    MS_IMAGEMODE_BYTE, MS_IMAGEMODE_INT16, and MS_IMAGEMODE_FLOAT32.  Normally
    set via the BAND_COUNT formatoption ... this field should be considered
    read-only.

driver : string
    A string such as 'GD/PNG' or 'GDAL/GTiff'.

extension : string
    Format file extension such as 'png'.

imagemode : int
    MS_IMAGEMODE_PC256, MS_IMAGEMODE_RGB, MS_IMAGEMODE_RGBA, 
    MS_IMAGEMODE_INT16, MS_IMAGEMODE_FLOAT32, MS_IMAGEMODE_BYTE, or 
    MS_IMAGEMODE_NULL.
    
mimetype : string
    Format mimetype such as 'image/png'.
    
name : string
    A unique identifier.

renderer : int
    MS_RENDER_WITH_GD, MS_RENDER_WITH_SWF, MS_RENDER_WITH_RAWDATA, 
    MS_RENDER_WITH_PDF, or MS_RENDER_WITH_IMAGEMAP.  Normally set internally
    based on the driver and some other setting in the constructor. 
   
transparent : int
    MS_ON or MS_OFF.

outputFormatObj Methods
-----------------------

new outputFormatObj( string driver [, string name=driver ] ) : outputFormatObj_
    Create new instance.  If *name* is not provided, the value of *driver*
    is used as a name.
    
getOption( string key [, string value="" ] ) : string
    Return the format option at *key* or *value* if *key* is not a valid
    hash index.

setExtension( string extension ) : void
    Set file extension for output format such as 'png' or 'jpg'.  Method 
    could probably be deprecated since the extension attribute is mutable.

setMimetype( string mimetype ) : void
    Set mimetype for output format such as 'image/png' or 'image/jpeg'.
    Method could probably be deprecated since the mimetype attribute is
    mutable.
    
setOption( string key, string value ) : void
    Set the format option at *key* to *value*.  Format options are mostly 
    driver specific.  

validate() : int
    Checks some internal consistency issues, and returns MS_TRUE if things
    are OK and MS_FALSE if there are problems.  Some problems are fixed up
    internally.  May produce debug output if issues encountered.  
    

-----------------------------------------------------------------------------
 OWSRequest
-----------------------------------------------------------------------------

Not associated with other mapscript classes.  Serves as a message
intermediary between an application and MapServer's OWS capabilities.
Using it permits creation of lightweight WMS services:

::

    wms_map = mapscript.mapObj('wms.map')
    wms_request = mapscript.OWSRequest()

    # Convert application request parameters (req.args)
    for param, value in req.args.items():
        wms_request.setParam(param, value)
    
    # Map loads parameters from OWSRequest, adjusting its SRS, extents,
    # active layers accordingly
    wms_map.loadWMSRequest('1.1.0', wms_request)

    # Render the Map
    img = wms_map.draw()


OWSRequest Attributes
---------------------

NumParams : int immutable
    Number of request parameters.  Eventually should be changed to numparams
    lowercase like other attributes.

postrequest : string
    **TODO**
    
type : int
    MS_GET_REQUEST or MS_POST_REQUEST.

    
OWSRequest Methods
------------------

new OWSRequest( ) : OWSRequest
    Create a new instance.

setParameter( string name, string value ) : void
    Set a request parameter.  For example

::
    
    request.setParameter('REQUEST', 'GetMap')
    request.setParameter('BBOX', '-107.0,40.0,-106.0,41.0')

.. note:: MapServer's OWSRequest supports only single valued parameters.

getName( int index ) : string
    Return the name of the parameter at *index* in the request's array
    of parameter names.

getValue( int index ) : string
    Return the value of the parameter at *index* in the request's array
    of parameter values.

getValueByName( string name) : string
    Return the value associated with the parameter *name*.

loadParams() : int
    Initializes the OWSRequest object from the cgi environment variables
    REQUEST_METHOD, QUERY_STRING and HTTP_COOKIE.  Returns the number of 
    name/value pairs collected.  Warning: most errors will result in a 
    process exit!


-----------------------------------------------------------------------------
 pointObj
-----------------------------------------------------------------------------

A pointObj instance may be associated with a lineObj_.

::

    +-------+ 1..*  0..1 +------+
    | Point | <--------- | Line |
    +-------+            +------+

pointObj Attributes
-------------------

m : float
    Measure.  Meaningful only for measured shapefiles.  Given value
    -2e38 if not otherwise assigned to indicate "nodata".

x : float
    Easting
    
y : float
    Northing

z : float
    Elevation
    
pointObj Methods
----------------

new pointObj( [ float x=0.0, float y=0.0, float z=0.0, float m=-2e38 ] ) : pointObj
    Create new instance.  Easting, northing, and measure arguments are
    optional.

distanceToPoint( pointObj point ) : float
    Returns the distance to *point*.
   
distanceToSegment( pointObj point1, pointObj point2 ) : float
    Returns the minimum distance to a hypothetical line segment connecting 
    *point1* and *point2*.
   
distanceToShape( shapeObj_ shape ) : float
    Returns the minimum distance to *shape*.

draw( mapObj_ map, layerObj_ layer, imageObj_ image, int classindex, string text ) : int
    Draw the point using the styles defined by the *classindex* class of
    *layer* and labeled with string *text*.  Returns MS_SUCCESS or MS_FAILURE.

project( projectionObj_ proj_in, projectionObj_ proj_out ) : int
    Reproject point from *proj_in* to *proj_out*.  Transformation
    is done in place.  Returns MS_SUCCESS or MS_FAILURE.

setXY( float x, float y [, float m=2e-38 ] ) : int
    Set spatial coordinate and, optionally, measure values simultaneously.
    The measure will be set only if the value of *m* is greater than the
    ESRI measure no-data value of 1e-38.  Returns MS_SUCCESS or MS_FAILURE.

setXYZ( float x, float y, float z [, float m=-2e38 ] ) : int
    Set spatial coordinate and, optionally, measure values simultaneously.
    The measure will be set only if the value of *m* is greater than the
    ESRI measure no-data value of -1e38.  Returns MS_SUCCESS or MS_FAILURE.

setXYZM( float x, float y, float z, float m ) : int
    Set spatial coordinate and, optionally, measure values simultaneously.
    The measure will be set only if the value of *m* is greater than the
    ESRI measure no-data value of -1e38.  Returns MS_SUCCESS or MS_FAILURE.

toString() : string
    Return a string formatted like
    ::

        { 'x': %f , 'y': %f, 'z': %f }

    
    with the coordinate values substituted appropriately.  Python users can
    get the same effect via the pointObj __str__ method
    ::

        >>> p = mapscript.pointObj(1, 1)
        >>> str(p)
        { 'x': 1.000000 , 'y': 1.000000, 'z': 1.000000 }

toShape() : shapeObj_
    Convience method to quickly turn a point into a shapeObj.

------------------------------------------------------------------------------
 projectionObj
------------------------------------------------------------------------------

This class is not really fully implemented yet.  MapServer's Maps and Layers
have Projection attributes, and these are C projectionObj structures, but are
not directly exposed by the mapscript module.  Currently we have to do 
some round-a-bout logic like this
::

    point.project(projectionObj(mapobj.getProjection(), 
                  projectionObj(layer.getProjection())

to project a point from map to layer reference system.

projectionObj Attributes
------------------------

numargs : int immutable
    Number of PROJ.4 arguments.  

projectionObj Methods
---------------------

new projectionObj( string proj4 ) : projectionObj
    Create new instance of projectionObj.  Input parameter *proj4* is a 
    PROJ.4 definition string such as "init=EPSG:4269".

------------------------------------------------------------------------------
 rectObj
------------------------------------------------------------------------------

A rectObj may be a lone object or an attribute of another object and has no
other associations.
   
rectObj Attributes
------------------

maxx : float
    Maximum easting
    
maxy : float
    Maximum northing

minx : float
    Minimum easting
    
miny : float
    Minimum northing
    
rectObj Methods
---------------

new rectObj( [ float minx=-1.0, float miny=-1.0, float maxx=-1.0, float maxy=-1.0, int imageunits=MS_FALSE ] ) : rectObj
    Create new instance.  The four easting and northing arguments
    are optional and default to -1.0.  Note the new optional fifth argument
    which allows creation of rectangles in image (pixel/line) units which
    are also tested for validity.

draw( mapObj_ map, layerObj_ layer, imageObj_ img, int classindex, string text ) : int
    Draw rectangle into *img* using style defined by the *classindex* class
    of *layer*.  The rectangle is labeled with the string *text*.  Returns 
    MS_SUCCESS or MS_FAILURE.

getCenter() : pointObj_
    Return the center point of the rectagle.

project( projectionObj_ proj_in, projectionObj_ proj_out ) : int
    Reproject rectangle from *proj_in* to *proj_out*.  Transformation
    is done in place.  Returns MS_SUCCESS or MS_FAILURE.
    
toPolygon() : shapeObj_
    Convert to a polygon of five vertices.

toString() : string
    Return a string formatted like
    ::

        { 'minx': %f , 'miny': %f , 'maxx': %f , 'maxy': %f }

    
    with the bounding values substituted appropriately.  Python users can
    get the same effect via the rectObj __str__ method
    ::

        >>> r = mapscript.rectObj(0, 0, 1, 1)
        >>> str(r)
        { 'minx': 0 , 'miny': 0 , 'maxx': 1 , 'maxy': 1 }


-----------------------------------------------------------------------------
 referenceMapObj
-----------------------------------------------------------------------------

A referenceMapObj is associated with mapObj_.

::

     +--------------+ 0..1     1 +-----+
     | ReferenceMap | <--------> | Map |
     +--------------+            +-----+

referenceMapObj Attributes
--------------------------

color : colorObj_
    Color of reference box.
    
extent : rectObj_
    Spatial extent of reference in units of parent map.

height : int
    Height of reference map in pixels.

image : string
    Filename of reference map image.

map : mapObj_ immutable
    Reference to parent mapObj.
    
marker : int
    Index of a symbol in the map symbol set to use for marker.

markername : string
    Name of a symbol.

markersize : int
    Size of marker.

maxboxsize : int
    Pixels.

minboxsize : int
    Pixels.
    
outlinecolor : colorObj_
    Outline color of reference box.

status : int
    MS_ON or MS_OFF.
    
width : int
    In pixels.

referenceMapObj Methods
-----------------------

None


-----------------------------------------------------------------------------
 resultCacheMemberObj
-----------------------------------------------------------------------------

Has no associations with other Mapscript classes and has no methods.
By using several indexes, a resultCacheMemberObj refers to a single layer
feature.

resultCacheMemberObj Attributes
-------------------------------

classindex : int immutable
    The index of the layer class into which the feature has been classified.

shapeindex : int immutable
    Index of the feature within the layer.

tileindex : int immutable
    Meaningful for tiled layers only, index of the shapefile data tile.
    

-----------------------------------------------------------------------------
 resultCacheObj
-----------------------------------------------------------------------------

See querying-HOWTO.txt for extra guidance in using the new 4.4 query API.

resultCacheObj Attributes
-------------------------

bounds : rectObj_ immutable
    Bounding box of query results.

numresults : int immutable
    Length of result set.


resultCacheObj Methods
----------------------

getResult( int i ) : resultCacheObj_
    Returns the result at index *i*, like layerObj::getResult, or NULL if
    index is outside the range of results.

-----------------------------------------------------------------------------
 scalebarObj
-----------------------------------------------------------------------------

A scalebarObj is associated with mapObj_.

::

     +----------+ 0..1     1 +-----+
     | Scalebar | <--------- | Map |
     +----------+            +-----+
     
and also with labelObj_

::

     +----------+ 1        1 +-------+
     | Scalebar | ---------> | Label |
     +----------+            +-------+

scalebarObj Attributes
----------------------

backgroundcolor : colorObj_
    Scalebar background color.
    
color : colorObj_
    Scalebar foreground color.
    
imagecolor : colorObj_
    Background color of scalebar.

height : int
    Pixels.

intervals : int
    Number of intervals.

label : labelObj_
    Scalebar label.
    
outlinecolor : colorObj_
    Foreground outline color.
   
position : int
    MS_UL, MS_UC, MS_UR, MS_LL, MS_LC, or MS_LR.

postlabelcache : int
    MS_TRUE or MS_FALSE.

status : int
    MS_ON, MS_OFF, or MS_EMBED.
    
style : int
    0 or 1.

units : int
    See MS_UNITS in mapserver.h.
    
width : int
    Pixels.

scalebarObj Methods
-------------------

None


-----------------------------------------------------------------------------
 shapefileObj
-----------------------------------------------------------------------------

shapefileObj Attributes
-----------------------

bounds : rectObj_
    Extent of shapes
    
numshapes : int
    Number of shapes

type : int
    See mapshape.h for values of type.

shapefileObj Methods
--------------------

new shapefileObj( string filename [, int type=-1 ] ) : shapefileObj
    Create a new instance.  Omit the *type* argument or use a value of -1
    to open an existing shapefile.

add( shapeObj_ shape ) : int
    Add shape to the shapefile.  Returns MS_SUCCESS or MS_FAILURE.
    
get( int i, shapeObj_ shape ) : int
    Get the shapefile feature from index *i* and store it in *shape*.
    Returns MS_SUCCESS or MS_FAILURE.

getShape( int i ) : shapeObj_
    Returns the shapefile feature at index i.  More effecient than *get*.

*TODO*


-----------------------------------------------------------------------------
 shapeObj
-----------------------------------------------------------------------------

Each feature of a layer's data is a shapeObj.  Each part of the shape is a
closed lineObj_.

::

    +-------+ 1    1..* +------+
    | Shape | --------> | Line |
    +-------+           +------+

shapeObj Attributes
-------------------

bounds : rectObj_
    Bounding box of shape.
      
classindex : int
    The class index for features of a classified layer.
   
index : int
    Feature index within the layer.

numlines : int immutable
    Number of parts.

numvalues : int immutable
    Number of shape attributes.

text : string
    Shape annotation.

tileindex : int
    Index of tiled file for tileindexed layers.

type : int
    MS_SHAPE_POINT, MS_SHAPE_LINE, MS_SHAPE_POLYGON, or MS_SHAPE_NULL.
 
shapeObj Methods
----------------

new shapeObj( int type ) : shapeObj
    Return a new shapeObj of the specified *type*.  See the type attribute
    above. No attribute values created by default. initValues should be
    explicitly called to create the required number of values.

add( lineObj_ line ) : int
    Add *line* (i.e. a part) to the shape.  Returns MS_SUCCESS or MS_FAILURE.

boundary() : shapeObj
    Returns the boundary of the existing shape. Requires GEOS support.
    Returns NULL/undef on failure.

buffer( int distance ) : shapeObj
    Returns a new buffered shapeObj based on the supplied distance (given in
    the coordinates of the existing shapeObj). Requires GEOS support. 
    Returns NULL/undef on failure.

contains( pointObj_ point ) : int
    Returns MS_TRUE if the point is inside the shape, MS_FALSE otherwise.

contains( shapeObj shape2 ) : int
    Returns MS_TRUE if shape2 is entirely within the shape. Returns -1 on 
    error and MS_FALSE otherwise. Requires GEOS support.

convexHull() : shapeObj
    Returns the convex hull of the existing shape. Requires GEOS support. 
    Returns NULL/undef on failure.

copy( shapeObj shape_copy ) : int
    Copy the shape to *shape_copy*.  Returns MS_SUCCESS or MS_FAILURE.

clone() : shapeObj
    Return an independent copy of the shape.

crosses( shapeObj shape2 ) : int
    Returns MS_TRUE if shape2 crosses the shape. Returns -1 on error and 
    MS_FALSE otherwise. Requires GEOS support.

difference( shapeObj shape ) : shapeObj
    Returns the computed difference of the supplied and existing
    shape. Requires GEOS support. Returns NULL/undef on failure.

disjoint( shapeObj shape2 ) : int
    Returns MS_TRUE if shape2 and the shape are disjoint. Returns -1 on 
    error and MS_FALSE otherwise. Requires GEOS support.

distanceToPoint( pointObj_ point ) : float
    Return distance to *point*.
    
distanceToShape( shapeObj shape ) : float
    Return the minimum distance to *shape*.

draw( mapObj_ map, layerObj_ layer, imageObj_ img ) : int
    Draws the individual shape using layer.  Returns MS_SUCCESS or MS_FAILURE.

equals( shapeObj shape2 ) : int
    Returns MS_TRUE if the shape and shape2 are equal (geometry only). Returns -1
    on error and MS_FALSE otherwise. Requires GEOS support.

fromWKT( char \*wkt ) : shapeObj
    Returns a new shapeObj based on a well-known text representation of a 
    geometry. Requires GEOS support. Returns NULL/undef on failure.

get( int index ) : lineObj_
    Returns a reference to part at *index*.  Reference is valid
    only during the life of the shapeObj.

getArea() : double
    Returns the area of the shape (if applicable). Requires GEOS support.

getCentroid() : pointObj_
    Returns the centroid for the existing shape. Requires GEOS support. 
    Returns NULL/undef on failure.

getLength() : double
    Returns the length (or perimeter) of a shape. Requires GEOS support.

getValue( int i ) : string
    Return the shape attribute at index *i*.
    
initValues( int numvalues ) : void
    Allocates memory for the requested number of values.

intersects( shapeObj shape ) : int
    Returns MS_TRUE if the two shapes intersect, MS_FALSE otherwise.
    Note, does not require GEOS support but will use GEOS functions if
    available.

intersection( shapeObj shape ) : shapeObj
    Returns the computed intersection of the supplied and existing
    shape. Requires GEOS support. Returns NULL/undef on failure.

overlaps( shapeObj shape2 ) : int
    Returns MS_TRUE if shape2 overlaps shape. Returns -1 on error and 
    MS_FALSE otherwise. Requires GEOS support.

project( projectionObj_ proj_in, projectionObj_ proj_out ) : int
    Reproject shape from *proj_in* to *proj_out*.  Transformation
    is done in place.  Returns MS_SUCCESS or MS_FAILURE.

setBounds : void    
    Must be called to calculate new bounding box after new parts have been
    added.

    **TODO**: should return int and set msSetError.

setValue( int i, string value ) : int
    Set the shape value at index *i* to *value*.

symDifference( shapeObj shape ) : shapeObj
    Returns the computed symmetric difference of the supplied and existing
    shape. Requires GEOS support. Returns NULL/undef on failure.

touches( shapeObj shape2 ) : int
    Returns MS_TRUE if the shape and shape2 touch. Returns -1 on error and
    MS_FALSE otherwise. Requires GEOS support.

toWKT() : string
    Returns the well-known text representation of a shapeObj. Requires 
    GEOS support. Returns NULL/undef on failure.

Union( shapeObj shape ) : shapeObj
    Returns the union of the existing and supplied shape. Shapes must be
    of the same type. Requires GEOS support. Returns NULL/undef on failure.

within( shapeObj shape2 ) : int
    Returns MS_TRUE if the shape is entirely within shape2. Returns -1
    on error and MS_FALSE otherwise. Requires GEOS support.

-----------------------------------------------------------------------------
 styleObj
-----------------------------------------------------------------------------

An instance of styleObj is associated with one instance of classObj.

::

    +-------+ 0..*    1 +-------+
    | Style | <-------- | Class |
    +-------+           +-------+

An instance of styleObj can exist outside of a classObj container and
be explicitly inserted into the classObj for use in mapping.

::

    new_style = new styleObj()
    the_class.insertStyle(new_style)
    
It is important to understand that insertStyle inserts a **copy** of the
styleObj instance, not a reference to the instance itself.

The older use case 

::

    new_style = new styleObj(the_class)

remains supported.  These will be the only ways to access the styles of
a class.  Programmers should no longer directly access the styles attribute.

styleObj Attributes
-------------------

angle : double
    Angle, given in degrees, to draw the line work. Default is 0.
    For symbols of Type HATCH, this is the angle of the hatched lines.

angleitem : string
    Attribute/field that stores the angle to be used in rendering.
    Angle is given in degrees with 0 meaning no rotation.

antialias : int
    MS_TRUE or MS_FALSE. Should TrueType fonts and Cartoline symbols be antialiased.  

backgroundcolor : colorObj_
    Background pen color.

color : colorObj_
    Foreground or fill pen color.

mincolor : colorObj_
    Attribute for Color Range Mapping (RFC-6). mincolor, minvalue, maxcolor,
    maxvalue define the range for mapping a continuous feature value to a continuous
    range of colors when rendering the feature on the map.

minsize : int
    Minimum pen or symbol width for scaling styles.

minvalue : double
    Attribute for Color Range Mapping (RFC-6). mincolor, minvalue, maxcolor,
    maxvalue define the range for mapping a continuous feature value to a continuous
    range of colors when rendering the feature on the map.

minwidth : int
    Minimum width of the symbol.    

maxcolor : colorObj_
    Attribute for Color Range Mapping (RFC-6). mincolor, minvalue, maxcolor,
    maxvalue define the range for mapping a continuous feature value to a continuous
    range of colors when rendering the feature on the map.

maxsize : int
    Maximum pen or symbol width for scaling.
    
maxvalue : double
    Attribute for Color Range Mapping (RFC-6). mincolor, minvalue, maxcolor,
    maxvalue define the range for mapping a continuous feature value to a continuous
    range of colors when rendering the feature on the map.
    
maxwidth : int
    Maximum width of the symbol.
    
offsetx : int
    Draw with pen or symbol offset from map data.
    
offsety : int
    Draw with pen or symbol offset from map data.
    
outlinecolor : colorObj_
    Outline pen color.

rangeitem : string
    Attribute/field that stores the values for the Color Range Mapping (RFC-6).

size : int
    Pixel width of the style's pen or symbol.

sizeitem : string
    Attribute/field that stores the size to be used in rendering. Value is given in pixels.    

symbol : int
    The index within the map symbolset of the style's symbol.
    
symbolname : string immutable
    Name of the style's symbol.
    
width : int
    Width refers to the thickness of line work drawn, in pixels. Default is 1.
    For symbols of Type HATCH, the with is how thick the hatched lines are.

styleObj Methods
-----------------

new styleObj( [ classObj_ parent_class ] ) : styleObj
    Returns new default style Obj instance.  The *parent_class* is
    optional.

clone : styleObj
    Returns an independent copy of the style with no parent class.

setSymbolByName(mapObj_ map, string symbolname) : int
    Setting the symbol of the styleObj given the reference of the
    map object and the symbol name. 

-----------------------------------------------------------------------------
 symbolObj
-----------------------------------------------------------------------------

A symbolObj is associated with one symbolSetObj_.

::

    +--------+ 0..*    1 +-----------+
    | Symbol | <-------- | SymbolSet |
    +--------+           +-----------+

A styleObj_ will often refer to a symbolObj by name or index, but this is
not really an object association, is it?

symbolObj Attributes
--------------------

antialias : int
    MS_TRUE or MS_FALSE.

character : string
    For TrueType symbols.

filled : int
    MS_TRUE or MS_FALSE.

font : string
    For TrueType symbols.

gap : int
    **TODO** what is this?
    
imagepath : string
    Path to pixmap file.

linecap : int
    **TODO** unsure about the cartoline attributes.
    
linejoin : int
    **TODO**
    
linejoinmaxsize : float
    **TODO**

name : string
    Symbol name

numpoints : int immutable
    Number of points of a vector symbol.
  
position : int
    **TODO** ?
    
sizex : float
    **TODO** what is this?

sizey : float
    **TODO** what is this?

stylelength : int
    Number of intervals

transparent : int
    **TODO** what is this?
    
transparentcolor : int
    **TODO** is this a derelict attribute?
    
type : int
    MS_SYMBOL_SIMPLE, MS_SYMBOL_VECTOR, MS_SYMBOL_ELLIPSE, MS_SYMBOL_PIXMAP,
    MS_SYMBOL_TRUETYPE, or MS_SYMBOL_CARTOLINE.
    
symbolObj Methods
-----------------

new symbolObj( string symbolname [, string imagefile ] ) : symbolObj
    Create new default symbol named *name*.  If *imagefile* is specified,
    then the symbol will be of type MS_SYMBOL_PIXMAP.

getImage() : imageObj_
    Returns a pixmap symbol's imagery as an imageObj.
    
getPoints() : lineObj_
    Returns the symbol points as a lineObj.

setImage( imageObj_ image ) : int
    Set a pixmap symbol's imagery from *image*.
    
setPoints( lineObj_ line ) : int
    Sets the symbol points from the points of *line*.  Returns the updated
    number of points.

setStyle( int index, int value ) : int
    Set the style at *index* to *value*.  Returns MS_SUCCESS or MS_FAILURE.


-----------------------------------------------------------------------------
 symbolSetObj
-----------------------------------------------------------------------------

A symbolSetObj is an attribute of a mapObj_ and is associated with instances
of symbolObj_.

::

    +-----------+ 1    0..* +--------+
    | SymbolSet | --------> | Symbol |
    +-----------+           +--------+

symbolSetObj Attributes
-----------------------

filename : string
    Symbolset filename
    
numsymbols : int immutable
    Number of symbols in the set.

symbolSetObj Methods
--------------------

new symbolSetObj( [ string symbolfile ] ) : symbolSetObj
    Create new instance.  If *symbolfile* is specified, symbols will be 
    loaded from the file.

appendSymbol( symbolObj_ symbol ) : int
    Add a copy of *symbol* to the symbolset and return its index.

getSymbol( int index ) : symbolObj_
    Returns a reference to the symbol at *index*.

getSymbolByName( string name ) : symbolObj_
    Returns a reference to the symbol named *name*.

index( string name ) : int
    Return the index of the symbol named *name* or -1 in the case that
    no such symbol is found.

removeSymbol( int index ) : symbolObj_
    Remove the symbol at *index* and return a copy of the symbol.

save( string filename ) : int
    Save symbol set to a file.  Returns MS_SUCCESS or MS_FAILURE.

------------------------------------------------------------------------------
 webObj
------------------------------------------------------------------------------

Has no other existence than as an attribute of a mapObj.  Serves as a 
container for various run-time web application definitions like temporary
file paths, template paths, etc.

webObj Attributes
-----------------

empty : string
    **TODO**

error : string
    **TODO**

extent : rectObj_
    Clipping extent.
    
footer : string
    Path to footer document.

header : string
    Path to header document.
    
imagepath : string
    Filesystem path to temporary image location.

imageurl : string
    URL to temporary image location.
    
log : string
    **TODO**

map : mapObj immutable
    Reference to parent mapObj.

maxscale : float
    Maximum map scale.

maxtemplate : string
    **TODO**
   
metadata : hashTableObj_ immutable
    metadata hash table.

minscale : float
    Minimum map scale.

mintemplate : string
    **TODO**

queryformat : string
    **TODO**
    
template : string
    Path to template document.


webObj Methods
--------------

None.