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I have a shp file which contains some points. Each point has a "POINTTYPE" attribute which contains text.

Is it possible to apply a different symbol basing on this attribute? For example, if pointtype is "streetlamp" use a square icon, if it is "tree" use another one, etc...?

Thanks

EDIT:

Here is the final mapfile

LAYER
    NAME bla
    TYPE POINT
    GROUP bla
    DATA "bla.shp"
    STATUS OFF
    CLASS
      EXPRESSION ('[pointtype]' = 'streetlamp')
      STYLE 
        SYMBOL 'circle'
        SIZE 8
        COLOR 255 0 170
        OUTLINECOLOR 0 0 0
        ANTIALIAS TRUE
      END
    END
    # Other classes can go here, they will cumulate
END
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  • I think the correct syntax is EXPRESSION ([pointtype] = 'streetlamp')
    – Peter Krauss
    Commented Sep 5, 2012 at 14:05

1 Answer 1

Reset to default
5

Read about

LAYER
CLASSITEM
CLASS
EXPRESSION

in Mapserver documentation

HTH /Nicklas

edit:

example but with polygons in the documentation:

http://mapserver.org/tutorial/example1-3-map.html#example1-3-map

What can be tricky is to get the symbols right.
Is that the problem?

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9
  • I am missing just a few rep points to vote this down. If documentation was clear enough to understand this I wouldn't have asked.
    – Palantir
    Commented Mar 14, 2011 at 9:38
  • hmm, since you don't say anything about what part of the concept you don't understand I tried to point you to the parts of the map-file that handles those things. I will add a link to an example from the documentation in my answer.
    – Nicklas Avén
    Commented Mar 14, 2011 at 10:14
  • Much more useful now :) I just missed the EXPRESSION parameter and how to bind it on a point's property, which turned out to be: EXPRESSION ('[pointtype]' = 'streetlamp') inside the CLASS definition. Thanks for the hint.
    – Palantir
    Commented Mar 14, 2011 at 12:12
  • Ok, didn't it work with CLASSITEM?
    – Nicklas Avén
    Commented Mar 14, 2011 at 13:04
  • @Palantir - threatening to down vote someone who took the time to answer your question is not in my opinion a very good way to thank someone or build a good community here.
    – DavidF
    Commented Mar 14, 2011 at 14:46

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