[postgis-users] ESRI union (analysis) in Postgis
fazio at planetek.it
Wed Jul 7 00:31:07 PDT 2010
I would like to perform in PostGIS a processing like that performed by
the union(analysis) tool of ArcGIS.
See here reference
It is very difficult to add some words to what it does, so I've attached
two layers before and after the union.
This tool repeats the new created geometries as many times as the number
of the geometries which partecipate to the intersection, populating the
attribute table with the relative generating geometry values.
So, after its execution, it allows you to perform a sum on a column
attribute grouping by geometry.
Maybe such an operation could be generated using aotmic PostGIS operators.
Thank you very much
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