[mapserver-users] Clustering and style with [attribute]

[Jörg Thomsen (WhereGroup)]

Hello,

there's a clustered feature / class in my mapfile.
the color of the features are stored in the database.

LAYER
    NAME "lightrail"
    GROUP "default"
    ...
    CLUSTER
      MAXDISTANCE 50
      REGION "ellipse"
    END
    CLASS
      NAME "Clustered Lightrail Stations"
      EXPRESSION ("[Cluster_FeatureCount]" != "1")
      STYLE
        SIZE 30
        SYMBOL "citycircle"
        COLOR ['color']
      END
    END
...
END

If there are 4 features clustered into one symbol and each feature has a
different attribut-value 'color':

f1 | 100 100 100
f2 | 100 100 100
f3 | 0 0 255
f4 | 100 100 100

which color is used an why is it used?

My goal:
If all features of a cluster have the color-value 100 100 100, it is ok,
that the cluster-symbol ist grey. If only one of the clustered features
has the color-value 0 255 0 (and the other values are '100 100 100') the
cluster-symbol should be blue.

How can I achive this?

Viele Grüße,
Jörg

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