[Mapserver-users] Can a calculation be done in a MAP template?

Mon Feb 23 09:31:00 PST 2004

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I have this in a output template:

<area shape=polygon href='%linkPrefix%[UTM_X] 
[UTM_Y],[COUNTYNAME]%linkSuffix%' coords="[shpxy xf="," transform]">

Right now I get:

    %linkPrefix%mapext=491661.2500 4983641.6900%linkSuffix%

I need to convert the UTM_X and UTM_Y centerpoint above into a  bounding 
box for MAPSERVER request (minx miny maxx maxy)

the output will be needed like this:

    %linkPrefix%mapext=311661.25 4837391.69 671661.25
    B5129891.69%linkSuffix%

I looked at possibly using the IMGXY with BUFFER, but I don't see how to 
use that with non-square aspect ratio for the resulting image.  Can 
Mapserver be queried by centerpoint, width, height?

My backup to this is to try and parse the above. Not a task I want to 
do. At this point.

Thanks

bobb

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I have this in a output template: 
 
 
<area shape=polygon href='%linkPrefix%[UTM_X]
[UTM_Y],[COUNTYNAME]%linkSuffix%' coords="[shpxy xf="," transform]"> 
 
Right now I get: 
<blockquote>%linkPrefix%mapext=491661.2500 4983641.6900%linkSuffix% 
</blockquote>
I need to convert the UTM_X and UTM_Y centerpoint above into a 
bounding box for MAPSERVER request (minx miny maxx maxy) 
 
the output will be needed like this: 
<blockquote>%linkPrefix%mapext=311661.25 4837391.69 671661.25
B5129891.69%linkSuffix% 
</blockquote>
 
I looked at possibly using the IMGXY with BUFFER, but I don't see how
to use that with non-square aspect ratio for the resulting image.  Can
Mapserver be queried by centerpoint, width, height? 
 
My backup to this is to try and parse the above. Not a task I want to
do. At this point. 
 
Thanks 
 
bobb 
 
 
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