[postgis] OGI SF SQL ?

[Paul Ramsey]

David Valentine wrote:
> 
> Does postgis fully support the 1.1 OGIS spec?

It aims to. That is the goal. We are on the path. We are not, however,
over the mountains. We do currently have full support of WKT and WKB, so
the example you cite below should work fine. We also have spatial
indexing. What we do not have is intesection, union, buffer, and exact
topological relationships (touches, contains, overlaps) except for a few
special cases. (Incidentally, a geometrycollection of a single polygon
is a bit redundant, is it possible your WKT dumper is overgeneralizing,
or do you truly have heterogeneous geometry collections to insert into
the database?)

> Basically I am unloading information from the MapInfo Spatialware datablade as
> WKT, and would like to reload it another database for testing.
> 
> But, the Informix spatial blade chokes on "GEOMETRYCOLLECTION()"
> 
> GEOMETRYCOLLECTION(POLYGON((-85.260002 29.07,-84.279999 29.07,-84.279999
> 30.059999,-85.260002 30.059999,-85.260002 29.07)))
> 
> Just checking on postGIS compliance prior to the spending the installing the
> software.
> 
> David Valentine
> Map & Imagery Laboratory
> UCSB Davidson Library
> phone: 805 893 4545
> fax:      805 893 8799
> 
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