Albert Krueger wrote:
Hi at all,
I have a Donut-Polygon with a number of Innerrings. Now I would like to
delete some Innerrings. For Example I have a polygon with five
Innerrings. ButI want to delete the second and the fourth Innerring. Has
anyone an idea how I can get a polygon with only three Innerrings
(1,3,5) then?
Albert,
In general the postGIS model does not support editing of geometry, so
the you have to think of edits in terms of deconstruction and
construction of new objects. There are various tools like dump() or
st_dump(), ST_DumpRings(), ST_ExteriorRing(), ST_NumInteriorRings(),
ST_NumInteriorRing(), ST_InteriorRingN(), ST_MakePolygon(linestring,
[linestring[]]), ST_BuildArea(), etc.
-Steve
_______________________________________________
postgis-users mailing list
[email protected]
http://postgis.refractions.net/mailman/listinfo/postgis-users
