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Results tagged with layers
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user 22803
A layer is a collection of information. It contains specific elements of a gis in a specific presentation method (e.g raster or vector layer). Layers can be edited separately in order to create individual topics for a map.
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answer
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Spatialite union more than two layers / tables
For example, if all I want is all the geometries of four layers, I need to do:
SELECT ST_Collect(ST_Collect(tbl1.geom, tbl2.geom), ST_Collect(tbl3.geom, tbl4.geom))
FROM tbl1, tbl2, tbl3, tbl4
Is there …
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