11.02.2016, 11:53, Jukka Rahkonen kirjoitti:
Hi,Ogrinfo is printing the WKT of XYZ geometries this way: ogrinfo polygonz.gpkg -al INFO: Open of `polygonz.gpkg' using driver `GPKG' successful. Layer name: polygonz Geometry: Unknown (any) Feature Count: 1 Extent: (340.000000, 420.000000) - (560.000000, 580.000000) Layer SRS WKT: (unknown) FID Column = fid Geometry Column = geom OGRFeature(polygonz):1 POLYGON ((340 580 1,560 580 2,560 420 3,340 580 1)) In "OpenGIS® Implementation Standard for Geographic information - Simple feature access - Part 1: Common architecture" POINT is defined as 2 dimensional. Wouldn't the right WKT be POLYGON Z ((340 580 1,560 580 2,560 420 3,340 580 1)) ? I have tested that some software like OpenJUMP and PostGIS do accept POLYGON with 3 coordinates while some other like Spatialite do not. Because Ari is now working with XYZ(M) code would this also be worth a review?
In GDAL there are two WKT formats. Legacy one and ISO one. Legacy one is like above and ISO one prints the Z. I guess ogrinfo is using the legacy one.
Ari
-Jukka Rahkonen- _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
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