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<DIV><FONT face=Arial size=2>Hi all,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm doing some R & D for a system that is going
need to produce as many as 40 maps per second for a busy web site. The
mapdata is going come from either PostGIS or Oracle Spatial. Each map will
be different and should immediately zoom to the full extent "defined" by one of
the layers which will be a spatial query "defining" the results of the
users request.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>My question is about the best way of deriving that
extent. I could (effectively) run the spatial query twice - once myself in
PHP/MapScript (or whatever language is used to create the map) to get the extent
(and hence set it "into" the MapServer request) and then MapServer itself will
perform a very similar query to actually draw the map. As performance is
of paramount importance i'd like to remove this "duplication" if at all
possible.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I may be missing something obvious but is there an
easy way to do this? Ideally i'd just like to specify that the map should
always zoom to the extent "implied" by a particular layers
features.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Many thanks for your thoughts,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Steve H<BR></FONT></DIV></BODY></HTML>