[mapserver-users] MAP EXTENT

Stephen Woodbridge woodbri at swoodbridge.com
Thu Apr 11 08:48:49 PDT 2002


Stefano,

I am not sure if this is the problem but you aspect ratio of image size
to map EXTENTS is not 1:1

image   dH=600 
        dW=600 
        ratio=600/600 = 1

extents dx=(14.82- 6.17)=8.65
        dy=(47.14-42.98)=4.84
        ratio=8.65/4.84=1.79 which != 1 above

so try:
EXTENTS 6.17 40.735 14.82 49.385

-Steve

Stefano Bonnin wrote:
> 
> I have yet presented this problem but nobody answered me, please:
> 
> say me if this is a too stupid question ...
> 
> I have a map (North Italy) and I'm trying to display it with Mapserver.
> The map is displayed but only a "fragment" of the map appear on the screen.
> If I want to see the remainder of the map I have to use the pan function.
> 
> How can I do in orther to view all the map?
> 
> This is my map file (a fragment):
> 
> NAME DEMO
> STATUS ON
> SIZE 600 600
> EXTENT 6.174567 42.975424 14.815678 47.143435
> 
> UNITS DD
> SHAPEPATH "data"
> IMAGECOLOR 255 255 255
> SYMBOLSET "/Program Files/Apache
> Group/Apache/htdocs/Nord/symbols/symbol.sym"
> FONTSET "/WINNT/Fonts/fonts.list"
> 
> If I try to modify the EXTENT nothing happen, another fragment of the map is
> displayed (but not the entire map)
> 
> Somebody can help me? I hope so ......
> 
> Thanks,
> 
> Stefano B.
> 
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