Passing a variable in mapserver

[Matthew Perry]

Ruben,

 You can attach arbitrary variables to the URL that requests the image:

   http://...mapserv?mode=map?myvar=123

Then in your mapfile you can set the FILTER item for your postgis
layer and reference that variable:

 FILTER "mycolumn = %myvar%"

This variable substition method only works on certain mapfile items
such as  FILTER and DATA but that should be sufficient to do a postgis
query.

and here's the official docs
http://mapserver.gis.umn.edu/docs/reference/mapfile/variable_sub

Matt

On 1/27/06, ruben rincon (sent by Nabble.com) <lists at nabble.com> wrote:
>  Hello... everybody
>
> I'm about to finish my final project but I've found myself with a problem I
> haven't been able to handle.
>
> I need to pass a variable to the map file in order to make a query using
> postgis but I've no idea how to do it.
>
> There's no information about it but I know it's possible.  I just want to
> know how to declare the variable in the map file and the html file.
>
> So if you know how to do it or have a clue write me to this mail
>
>
> rdrincon at unicauca.edu.co
> rubenrincon27 at hotmail.com
>
> Thank you
> ________________________________
>  View this message in context: Passing a variable in mapserver
>  Sent from the Mapserver - User forum at Nabble.com.


--
Matt Perry
perrygeo at gmail.com
http://www.perrygeo.net