On 22-Jun-06, at 8:50 PM, Aaron Koning wrote:

If you imported the spatial layer with shp2pgsql or OGR programs, their should be a unique id field already (e.g. 'gid' with shp2pgsql). You can tell MapServer to use this unique id field instead of oid in the LAYER -> DATA variable of your MapFile.

Example:
     DATA "the_geom FROM roads AS foo USING UNIQUE gid"

That's a much better - thanks Aaron. I'm told by postgresql gurus not to ever use the oid... that it should only be used for internal database key purposes and cannot be relied on as stable. Oh well, thanks for pointing out a better option.

Tyler

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