[Mapserver-users] Spatial Joins

[Steve Lime]

Just to add to Paul's note. With the MapServer CGI you can to feature
queries
which are done in two stages. With mapscript you can do n-stage queries
if
you had to albeit with multiple commands. 

Steve

>>> Paul Ramsey <pramsey at refractions.net> 06/05/03 06:08PM >>>
Wendy Roseberry wrote:
> Is it possible to do spatial joins between 2 or more data layers with

> mapserver?  Could someone provide an example?
>  
> Thanks,
> Wendy Roseberry
> Software Developer
> www.accessArkansas.org <http://www.accessArkansas.org>

You will probably find spatial joins easier to execute in PostGIS than

in Mapserver. People mean different things somethings when they say 
"spatial join". Sometimes they mean "two stage query": click select an

item in Layer A and then return all the items in Layer B which are 
within distance Q. You could do that in Mapserver using Mapscript I 
think. A general and complete spatial join you would want to use 
something like PostGIS for.

P.

-- 
       __
      /
      | Paul Ramsey
      | Refractions Research
      | Email: pramsey at refractions.net 
      | Phone: (250) 885-0632
      \_

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