[gdal-dev] [python-ogr] GML attributes are missing

[Frank Broniewski]

Hello,

I have a problem when converting datasources from one format to GML. 
Whenever I export my source datasource to a GML - datasource the 
attributes of the features are missing in the resulting gml file. Other 
exports to formats like shapefile, kml or geojson have the attributes 
included. When I use ogr2ogr the gml has attributes included. So my 
question is: What's the difference between e.g. a kml and a gml 
outputformat and why does one have attributes and the other doesn't?
I tried on windows using gdal 1.8 and on Hardy 8.04 with 1.7.x, and on 
both there're no attributes with the gml.

I use the following code to transform from one format to another:


target_driver = driver_by_name(target_format_name)
target_datasource = create_datasource(target_driver, output_destination)

for layer in iterate_layers(source_datasource):
     layer_name = layer.GetName()
     geometry_type = get_geometry_type(layer)
     target_layer = target_datasource.CreateLayer(layer_name, source_srs,
                                                  geometry_type)
     feature_definition = layer.GetLayerDefn()
     for feature in iterate_features(layer):
         target_feature = ogr.Feature(feature_definition)
         target_feature.SetFrom(feature)
         target_feature.SetFID(feature.GetFID())

         if transformation is not None:
             geometry_reference = feature.GetGeometryRef()
             geometry = geometry_reference.Clone()
             geometry.Transform(transformation)
             target_feature.SetGeometryDirectly(geometry)

         target_layer.CreateFeature(target_feature)


Full code:
http://paste.pocoo.org/show/344283/
Python test file
http://paste.pocoo.org/show/344284/



Frank




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