[mapserver-users] MINSCALEDENOM, MAXSCALEDENOM help/tutorial?

[Fawcett, David]

Chris, 

I always suggest just testing your map file using mode=map call to cgi
mapserver.  

MAXSCALEDENOM 50000  should do it.  

David.


-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Chris
Kantarjiev
Sent: Monday, August 31, 2009 3:17 PM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] MINSCALEDENOM, MAXSCALEDENOM help/tutorial?


I've got a large map that, for various reasons, wants to have all the
layers on by default. Since 
it's all the streets in the US, some of them highlighted by size, it
takes a long time to draw - in 
fact, mapserver often takes too long to respond, such that apache times
out.

I'm trying to use the MIN/MAXSCALEDENOM to control display. The examples
are not immediately 
helpful, since they only use a single value, and don't leave me with a
sense of how "min" or "max" 
applies.

For example - which of these is correct if I want the layer to only
appear when the map scale is 
lower than 1:50000 (that is, between 1:1 and 1:50000, or rather, with
very small features shown)?

   LAYER
     NAME "controlled-access-fc5"
     TYPE LINE
     STATUS DEFAULT
     TILEINDEX /maps/NAVTEQ/20092FC14/USstreets.shp
     TILEITEM "LOCATION"

     CLASS
       NAME "Controlled Access FC5"
       EXPRESSION (('[FUNC_CLASS]' eq '5') and ('[CONTRACC]' eq 'Y'))
       MAXSCALEDENOM 50000
       STYLE
         SYMBOL 1
         SIZE 3
         COLOR 0 255 0
      END
     END
   END

or

   LAYER
     NAME "controlled-access-fc5"
     TYPE LINE
     STATUS DEFAULT
     TILEINDEX /maps/NAVTEQ/20092FC14/USstreets.shp
     TILEITEM "LOCATION"

     CLASS
       NAME "Controlled Access FC5"
       EXPRESSION (('[FUNC_CLASS]' eq '5') and ('[CONTRACC]' eq 'Y'))
       MINSCALEDENOM 50000
       STYLE
         SYMBOL 1
         SIZE 3
         COLOR 0 255 0
      END
     END
   END
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