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/*
* geo_names.c
*
* This encapsulates all of the value-naming mechanism of
* libgeotiff.
*
* Written By: Niles Ritter
*
* copyright (c) 1995 Niles D. Ritter
*
* Permission granted to use this software, so long as this copyright
* notice accompanies any products derived therefrom.
*
*/
#include "geotiffio.h"
#include "geonames.h"
#include "geo_tiffp.h" /* for tag names */
static KeyInfo _formatInfo[] = {
{TYPE_BYTE, "Byte"},
{TYPE_SHORT, "Short"},
{TYPE_LONG, "Long"},
{TYPE_RATIONAL,"Rational"},
{TYPE_ASCII, "Ascii"},
{TYPE_FLOAT, "Float"},
{TYPE_DOUBLE, "Double"},
{TYPE_SBYTE, "SignedByte"},
{TYPE_SSHORT, "SignedShort"},
{TYPE_SLONG, "SignedLong"},
{TYPE_UNKNOWN, "Unknown"},
END_LIST
};
static KeyInfo _tagInfo[] = {
{GTIFF_PIXELSCALE, "ModelPixelScaleTag"},
{GTIFF_TRANSMATRIX, "ModelTransformationTag"},
{GTIFF_TIEPOINTS, "ModelTiepointTag"},
/* This alias maps the Intergraph symbol to the current tag */
{GTIFF_TRANSMATRIX, "IntergraphMatrixTag"},
END_LIST
};
static char *FindName(KeyInfo *info,int key)
{
static char errmsg[80];
while (info->ki_key>=0 && info->ki_key != key) info++;
if (info->ki_key<0)
{
sprintf(errmsg,"Unknown-%d", key );
return errmsg;
}
return info->ki_name;
}
char *GTIFKeyName(geokey_t key)
{
return FindName( &_keyInfo[0],key);
}
char *GTIFTypeName(tagtype_t type)
{
return FindName( &_formatInfo[0],type);
}
char *GTIFTagName(int tag)
{
return FindName( &_tagInfo[0],tag);
}
char *GTIFValueName(geokey_t key, int value)
{
KeyInfo *info;
switch (key)
{
/* All codes using linear/angular/whatever units */
case GeogLinearUnitsGeoKey:
case ProjLinearUnitsGeoKey:
case GeogAngularUnitsGeoKey:
case GeogAzimuthUnitsGeoKey:
case VerticalUnitsGeoKey:
info=_geounitsValue; break;
/* put other key-dependent lists here */
case GTModelTypeGeoKey: info=_modeltypeValue; break;
case GTRasterTypeGeoKey: info=_rastertypeValue; break;
case GeographicTypeGeoKey: info=_geographicValue; break;
case GeogGeodeticDatumGeoKey: info=_geodeticdatumValue; break;
case GeogEllipsoidGeoKey: info=_ellipsoidValue; break;
case GeogPrimeMeridianGeoKey: info=_primemeridianValue; break;
case ProjectedCSTypeGeoKey: info=_pcstypeValue; break;
case ProjectionGeoKey: info=_projectionValue; break;
case ProjCoordTransGeoKey: info=_coordtransValue; break;
case VerticalCSTypeGeoKey: info=_vertcstypeValue; break;
case VerticalDatumGeoKey: info=_vdatumValue; break;
/* And if all else fails... */
default: info = _csdefaultValue;break;
}
return FindName( info,value);
}
/*
* Inverse Utilities (name->code)
*/
static int FindCode(KeyInfo *info,char *key)
{
while (info->ki_key>=0 && strcmp(info->ki_name,key) ) info++;
if (info->ki_key<0)
{
/* not a registered key; might be generic code */
if (!strncmp(key,"Unknown-",8))
{
int code=-1;
sscanf(key,"Unknown-%d",&code);
return code;
}
else return -1;
}
return info->ki_key;
}
int GTIFKeyCode(char *key)
{
return FindCode( &_keyInfo[0],key);
}
int GTIFTypeCode(char *type)
{
return FindCode( &_formatInfo[0],type);
}
int GTIFTagCode(char *tag)
{
return FindCode( &_tagInfo[0],tag);
}
/*
* The key must be determined with GTIFKeyCode() before
* the name can be encoded.
*/
int GTIFValueCode(geokey_t key, char *name)
{
KeyInfo *info;
switch (key)
{
/* All codes using linear/angular/whatever units */
case GeogLinearUnitsGeoKey:
case ProjLinearUnitsGeoKey:
case GeogAngularUnitsGeoKey:
case GeogAzimuthUnitsGeoKey:
info=_geounitsValue; break;
/* put other key-dependent lists here */
case GTModelTypeGeoKey: info=_modeltypeValue; break;
case GTRasterTypeGeoKey: info=_rastertypeValue; break;
case GeographicTypeGeoKey: info=_geographicValue; break;
case GeogGeodeticDatumGeoKey: info=_geodeticdatumValue; break;
case GeogEllipsoidGeoKey: info=_ellipsoidValue; break;
case GeogPrimeMeridianGeoKey: info=_primemeridianValue; break;
case ProjectedCSTypeGeoKey: info=_pcstypeValue; break;
case ProjectionGeoKey: info=_projectionValue; break;
case ProjCoordTransGeoKey: info=_coordtransValue; break;
case VerticalCSTypeGeoKey: info=_vertcstypeValue; break;
case VerticalDatumGeoKey: info=_vdatumValue; break;
/* And if all else fails... */
default: info = _csdefaultValue;break;
}
return FindCode( info,name);
}
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