[postgis-users] measurements of multi-features?

Paul Ramsey pramsey at cleverelephant.ca
Thu Jul 3 08:23:03 PDT 2008

On Mon, Jun 30, 2008 at 4:41 PM,  <pcreso at pcreso.com> wrote:

> Will st_area provide the sum of all the areas bounded by each constituent polygon, irrespective of any overlaps, or the actual area covered by the multipolygon?

Sum of areas of constituents.

> Similarly for multilines where some parts of some lines are contiguous, what is the returned length of such multilines?

Sum of areas of constituents.

> Are there any known gotchas when working with multi geometries comprising overlapping members?

Overlapping multipolygons are invalid.


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