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55c27ce710
- Add some tests for conversion to/from WKT, using a bulk lot of testsdata from PostGIS - Add some tests for area/length calculation, using some test data and results from PostGIS/geos unit tests - Add tests for spatial relations, using test data from PostGIS. Note that this required adding support for calculating the DE-9IM relation. I'll expose this to users via the expression engine in 2.14. Along the way this also fixes a number of bugs relating to WKT geometry import, such as - add support for alternate MultiPoint(1 1,2 2,...) format - fix GeometryCollection to support collections with multi* children and GeometryCollection children (allowed by spec)