I'm importing many sets of geodata into PostGIS, and they have different SRID's. (Some have EPSG:3857, some EPSG:4326, some something else). I'd like to create an additional geometry column, eg. the_geom_mercator with SRID EPSG:3857, and also keep the original SRID geom column.
How can I do this with a PostGIS function?
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How can I do this with a PostGIS function?
أكثر...