[postgis] distance(geometry,geometry) function

Timothy H. Keitt tklistaddr at keittlab.bio.sunysb.edu
Tue Jul 24 16:06:40 PDT 2001

Frank Warmerdam wrote:

>Dave may want to add to this, but the approach of having a base geometry
>type is essentially inherited from the OpenGIS simple features geometry
>model.  In particular, for OGC simple features it is necessary to be
>able to mix geometry types within a given column in a given table.  
>If we implement the full Simple Features for SQL metadata (via auxilary
>tables) there will be a mechanism to indicate that particular tables
>are restricted to a particular subtype in the total set of possible
>geometry types. 
Sounds good.   I suspected that postgis was following some standard way 
of doing things. (I just didn't know what it was.)


Timothy H. Keitt
Department of Ecology and Evolution
State University of New York at Stony Brook
Stony Brook, New York 11794 USA
Phone: 631-632-1101, FAX: 631-632-7626

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