I have geometry of buildings in Shapefile MultiPatch format. I want to import it into PostGIS database in the same format.
Is that even possible? If yes, then how?
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Please edit the question to include the software you would use for the conversion.– VinceJun 29, 2015 at 11:57
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According to the ogr2ogr docs, "MultiPatch files are read and each patch geometry is turned into a multi-polygon representation with one polygon per triangle in triangle fans and meshes." So, not exactly the same format.– John PowellJun 29, 2015 at 12:05
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When I tried to import it with tool pgShapeLoader, it appeared as "unsupported data type". Can you help me how can I get this data to DB, please? Thanks for answer.– Michal DolnikJun 30, 2015 at 12:40
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This is possible using FME Shapefile to PostGIS. I have achieved it before and it creates Tin Zs and PolyhedralSurfaces– James MilnerJan 9, 2016 at 21:27
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@JohnPowell From that description in docs I would expect that all the resulting polygons are triangles so they all have exactly 3 vertices, but I'm getting polygons with variable number of vertices. It doesn't make sense to me..– calavera.infoNov 8, 2018 at 20:57
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1 Answer
I realize this is quite old but just came across the same issue and wanted to share a solution. Strictly speaking John Powell is right – it can't be the same format because it needs to be converted on import to a PostGIS-supported form. However, using ogr2ogr you have some control over how this happens:
Something like $ ogr2ogr -f "PostgreSQL" "PG:host=localhost port=5432 user=your_name dbname=db password=pass" "path_to_multipatch.gdb" -lco GEOMETRY_NAME=geom -lco FID=gid -lco PRECISION=no -nln table_name -overwrite will create a PostGIS table with the default MULTIPOLYGON Z geometry type.
By adding -nlt "POLYHEDRALSURFACE Z" you can choose to import as polyhedral surfaces instead, which may be better depending on the use case. I believe this will also work if you want TIN Z, as with James Milner's solution using FME Shapefile to PostGIS.
