ST_AsGML for curve types
|Reported by:||mhugent||Owned by:||pramsey|
Dear PostGIS team
Find attached a patch adding GML output for the curve types (circularstring, compoundcurve, curvepolygon, multicurve, multisurface). Cunit and sql tests are provided as well. As it is my second PostGIS contribution (after 7 years break), please review carefully.