[postgis-users] measurements of multi-features?

[Paul Ramsey]

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.

P