Hide and show city labels depending on population

[Milo van der Linden]

Hello list,

I have been puzzling a bit and am not finding the correct answer.

I have a city mapinfo tab that holds population values. I want to display:
- The labels of the major cities when zoomed out far,
- add the labels of medium cities when I zoom in further
- show all labels when zoomed in max

Currently my syntax in the mapfile is as below, but I can't get a map
that shows only the labels of the major cities!

Any help is appreciated

LABELITEM 'City'
    CLASSITEM 'City_Population'
    CLASS
      NAME '0 < City_Population < 100000'
      EXPRESSION ( ([City_Population] >= 0) AND ([City_Population] <=
100000) )
      STYLE
        SYMBOL 'CIRCLE'
        SIZE 3
          OUTLINECOLOR 0 0 0
          COLOR 255 170 0
        END
     LABEL
      TYPE TRUETYPE
      FONT Arial
      SIZE 8
      COLOR 255 255 250
      #OUTLINECOLOR 255 255 255
      ANTIALIAS TRUE
      MINFEATURESIZE 500
      ANGLE 0
      FORCE false
     END
    END
    CLASS
      NAME '100001 < City_Population < 500000'
      EXPRESSION ( ([City_Population] >= 100001) AND ([City_Population]
<= 500000) )
      STYLE
        SYMBOL 'CIRCLE'
        SIZE 4
          OUTLINECOLOR 0 0 0
          COLOR 255 170 0
        END
     LABEL
      TYPE TRUETYPE
      FONT Arial
      SIZE 10
      COLOR 255 255 250
      #OUTLINECOLOR 255 255 255
      ANTIALIAS TRUE
      MINFEATURESIZE 500
      ANGLE 0
      FORCE false
     END
    END
-- 


	

Milo van der Linden
mlinden at zeelandnet.nl <mailto:mlinden at zeelandnet.nl>
milovanderlinden at gmail.com <mailto:milovanderlinden at gmail.com>
milo at 3dsite.nl <mailto:milo at 3dsite.nl>
http://www.3dsite.nl

	  	

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