[postgis-devel] [PostGIS] #1678: [raster] GDAL_DATA dependency

PostGIS trac at osgeo.org
Fri Oct 19 08:46:20 PDT 2012

#1678: [raster] GDAL_DATA dependency
 Reporter:  robe    |       Owner:  pracine      
     Type:  defect  |      Status:  new          
 Priority:  medium  |   Milestone:  PostGIS 2.1.0
Component:  raster  |     Version:  trunk        
 Keywords:          |  

Comment(by mloskot):

 I just grabbed the latest PostGIS 2.0.1 installer for Windows and
 PostgreSQL 9.2.

 IMHO, setting GDAL_DATA by the installer is a not a idea.

 Couldn't PostGIS recover the location in run-time, on Windows, and set it
 with GDAL's CPLSetConfigOption according to scheme like this:

  * ''postgis-2.0.dll'' has DllMain defined
  * ''DllMain'' calls ''GetModuleFileName'' to find its own location, e.g.
 C:\Program Files (x86)\PostgreSQL\9.2\lib\postgis-2.0.dll
  * Assuming both, ''postgis-2.0.dll'' and ''lib\'' are static parts, it's
 easy to find root folder:
 C:\Program Files (x86)\PostgreSQL\9.2
  * Assuming both, ''gdal-data\'' directory name is static part, it's easy
 to compile GDAL_DATA location:
 C:\Program Files (x86)\PostgreSQL\9.2\gdal-data\
  * And, stores it in non-exported DLL global:
 static char* gPostGISGDALDataFolder = NULL;
  * Finally, each PostgreSQL sets its own copy of environment:
 CPLSetConfigOption( "GDAL_DATA", gPostGISGDALDataFolder);

Ticket URL: <http://trac.osgeo.org/postgis/ticket/1678#comment:13>
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