+ added some new parameters toallow setting "gid" (geometry id), "field_data" (additional text data with the geometry), "field_name" (name of the additional text data field)
+ added proper usage of extent and coord2d selections in spatial queries
+ cosmetics
geometries directly inside a XML file by specifying a WKT text.
Useful a lot for building legend images for layers or drawing fixed
geometries in the map. An update of the main SConstruct and python
bindings for this will follow. Be careful with this, as it's mainly
alpha code.