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/**********************************************************************
* $Id: mapprojhack.c,v 1.8 2005/10/26 18:03:22 frank Exp $
*
* Project: MapServer
* Purpose: Implementation of utility functions related to the PROJ4 library
* Author: DM Solutions Group (assefa@dmsolutions.ca)
*
**********************************************************************
* Copyright (c) 2001, DM Solutions Group Inc
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
**********************************************************************
*
* $Log: mapprojhack.c,v $
* Revision 1.8 2005/10/26 18:03:22 frank
* don't include ConvertProj func without USE_PROJ
*
* Revision 1.7 2005/02/18 03:06:47 dan
* Turned all C++ (//) comments into C comments (bug 1238)
*
* Revision 1.6 2005/01/24 14:30:14 frank
* Avoid pj_units init warnings.
*
* Revision 1.5 2004/10/21 04:30:55 frank
* Added standardized headers. Added MS_CVSID().
*
* Revision 1.4 2004/09/03 14:23:07 frank
* make internal copy of pj_units for easier build on win32
*
* Revision 1.3 2001/12/10 22:31:27 sdlime
* Added include for string.h to mapprojhack.c to avoid a compiler warning.
*
* Revision 1.2 2001/10/17 14:13:49 dan
* Hopefully fixed conflict between projects.h and proj_api.h includes.
*
* Revision 1.1 2001/10/17 13:12:35 assefa
* Add functions to set the unis of the map when the projection
* is changed.
*
*
**********************************************************************/
/* ====================================================================
This file includes only mapproject.h (which includes projects.h)
and none of the windows include files. This is because of a conflict
in names (PJ_VALUE) between the projects.h and windows include file
winreg.h.
==================================================================== */
/* Make sure we include projects.h before mapproject.h, because proj_api.h
* may end up being included instead by mapproject.h ifdef USE_PROJ_API_H
*/
#ifdef USE_PROJ
#include <projects.h>
#endif
#include <string.h>
#include "mapproject.h"
enum MS_UNITS {MS_INCHES, MS_FEET, MS_MILES, MS_METERS, MS_KILOMETERS, MS_DD,
MS_PIXELS};
/************************************************************************/
/* ConvertProjUnitStringToMS */
/* */
/* Returns mapserver's unit code corresponding to the proj */
/* unit passed as argument. */
/* Please refer to ./src/pj_units.c file in the Proj.4 module. */
/************************************************************************/
#ifdef USE_PROJ
static int ConvertProjUnitStringToMS(const char *pszProjUnit)
{
if (strcmp(pszProjUnit, "m") ==0)
{
return MS_METERS;
}
else if (strcmp(pszProjUnit, "km") ==0)
{
return MS_KILOMETERS;
}
else if (strcmp(pszProjUnit, "mi") ==0 || strcmp(pszProjUnit, "us-mi") ==0)
{
return MS_FEET;
}
else if (strcmp(pszProjUnit, "in") ==0 || strcmp(pszProjUnit, "us-in") ==0 )
{
return MS_INCHES;
}
else if (strcmp(pszProjUnit, "ft") ==0 || strcmp(pszProjUnit, "us-ft") ==0)
{
return MS_FEET;
}
return -1;
}
#endif /* def USE_PROJ */
/************************************************************************/
/* pj_units[] copy. It is safer for win32 builds to include a */
/* copy of pj_units instead of trying to get the variable from */
/* the proj dll. */
/************************************************************************/
#ifdef USE_PROJ
struct PJ_UNITS
pj_units_copy[] = {
{"km", "1000.", "Kilometer"},
{"m", "1.", "Meter"},
{"dm", "1/10", "Decimeter"},
{"cm", "1/100", "Centimeter"},
{"mm", "1/1000", "Millimeter"},
{"kmi", "1852.0", "International Nautical Mile"},
{"in", "0.0254", "International Inch"},
{"ft", "0.3048", "International Foot"},
{"yd", "0.9144", "International Yard"},
{"mi", "1609.344", "International Statute Mile"},
{"fath", "1.8288", "International Fathom"},
{"ch", "20.1168", "International Chain"},
{"link", "0.201168", "International Link"},
{"us-in", "1./39.37", "U.S. Surveyor's Inch"},
{"us-ft", "0.304800609601219", "U.S. Surveyor's Foot"},
{"us-yd", "0.914401828803658", "U.S. Surveyor's Yard"},
{"us-ch", "20.11684023368047", "U.S. Surveyor's Chain"},
{"us-mi", "1609.347218694437", "U.S. Surveyor's Statute Mile"},
{"ind-yd", "0.91439523", "Indian Yard"},
{"ind-ft", "0.30479841", "Indian Foot"},
{"ind-ch", "20.11669506", "Indian Chain"},
{(char *)0, (char *)0, (char *)0}
};
#endif /* def USE_PROJ */
/************************************************************************/
/* int GetMapserverUnitUsingProj(projectionObj *psProj) */
/* */
/* Return a mapserver unit corresponding to the projection */
/* passed. Retunr -1 on failure */
/************************************************************************/
int GetMapserverUnitUsingProj(projectionObj *psProj)
{
#ifdef USE_PROJ
struct PJ_UNITS *lu;
if (psProj && psProj->proj)
{
if (psProj->proj->is_latlong)
return MS_DD;
/* psProj->proj->to_meter; */
for (lu = pj_units_copy; lu->id ; ++lu)
{
if (strtod(lu->to_meter, NULL) == psProj->proj->to_meter)
return ConvertProjUnitStringToMS(lu->id);
}
}
#endif
return -1;
}
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