1 files changed, 59 insertions, 0 deletions
diff --git a/webapp/django/contrib/gis/gdal/__init__.py b/webapp/django/contrib/gis/gdal/__init__.py
new file mode 100644
index 0000000000..b318850b28
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+++ b/webapp/django/contrib/gis/gdal/__init__.py
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+"""
+ This module houses ctypes interfaces for GDAL objects.  The following GDAL
+ objects are supported:
+
+ CoordTransform: Used for coordinate transformations from one spatial
+  reference system to another.
+
+ Driver: Wraps an OGR data source driver.
+  
+ DataSource: Wrapper for the OGR data source object, supports
+  OGR-supported data sources.
+
+ Envelope: A ctypes structure for bounding boxes (GDAL library
+  not required).
+
+ OGRGeometry: Layer for accessing OGR Geometry objects.
+
+ OGRGeomType: A class for representing the different OGR Geometry
+  types (GDAL library not required).
+
+ SpatialReference: Represents OSR Spatial Reference objects.
+
+ The GDAL library will be imported from the system path using the default  
+ library name for the current OS. The default library path may be overridden
+ by setting `GDAL_LIBRARY_PATH` in your settings with the path to the GDAL C 
+ library on your system.  
+
+ GDAL links to a large number of external libraries that consume RAM when 
+ loaded.  Thus, it may desirable to disable GDAL on systems with limited
+ RAM resources -- this may be accomplished by setting `GDAL_LIBRARY_PATH`
+ to a non-existant file location (e.g., `GDAL_LIBRARY_PATH='/null/path'`; 
+ setting to None/False/'' will not work as a string must be given).
+"""
+import sys
+
+# Attempting to import objects that depend on the GDAL library.  The
+# HAS_GDAL flag will be set to True if the library is present on
+# the system.
+try:
+    from django.contrib.gis.gdal.driver import Driver
+    from django.contrib.gis.gdal.datasource import DataSource
+    from django.contrib.gis.gdal.libgdal import gdal_version, gdal_full_version, gdal_release_date
+    from django.contrib.gis.gdal.srs import SpatialReference, CoordTransform
+    from django.contrib.gis.gdal.geometries import OGRGeometry, GEOJSON
+    HAS_GDAL = True
+except:
+    HAS_GDAL, GEOJSON = False, False
+
+# The envelope, error, and geomtype modules do not actually require the
+# GDAL library, but still nead at least Python 2.4 and ctypes.
+PYTHON23 = sys.version_info[0] == 2 and sys.version_info[1] == 3
+if not PYTHON23:
+    try:
+        from django.contrib.gis.gdal.envelope import Envelope
+        from django.contrib.gis.gdal.error import check_err, OGRException, OGRIndexError, SRSException
+        from django.contrib.gis.gdal.geomtype import OGRGeomType
+    except ImportError:
+        # No ctypes, but don't raise an exception.
+        pass