Hi Stephan,<div><br></div><div>I'm not sure exactly what you would like to achieve. The GROUP setting specifies which features may belong to the same cluster. This setting can be an expression (including the feature attributes) which evaluates to a string value. Features with different group string value are not used within the same cluster.</div>
<div><br></div><div>The FILTER setting can also be an expression (including the feature attributes or the aggregated attributes) which evaluates to a boolean value. This boolean determines whether the particular shapes should be filtered out or not in the clustering process.</div>
<div><br></div><div>You can continue to use the CLASSITEM setting or class EXPRESSION (including the aggregated attributes, like Cluster:FeatureCount in the expressions) to control which class is used to display a particular clustered shape.</div>
<div><br></div><div>What do you mean by validation in the GROUP or FILTER expressions?</div><div><br></div><div><br></div><div>Best regards,</div><div><br></div><div>Tamas</div><div><br></div><div><br></div><div><br><br><div class="gmail_quote">
2011/10/19 Stephan Holl <span dir="ltr"><<a href="mailto:stephan.holl@intevation.de">stephan.holl@intevation.de</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear mapservers,<br>
<br>
I am playing arround with the CLUSTER-directive and I am going fine.<br>
<br>
Though there are some questions left I cannot answer by myself and the<br>
documentation.<br>
<br>
Is it possible to cluster a POINT layer based on a specific attribute<br>
columns? THis column is the basis of the classification of the layer.<br>
<br>
What I want to achive is adding a label to each CLASS if the<br>
Cluster:FeatureCount is > 1.<br>
<br>
The docs do not make it clear for me if CLUSTER:GROUP or CLUSTER:FILTER<br>
is the correct stuff. Neither of them work during tests.<br>
<br>
Could someone tell me if this could be done with the CLUSTERing?<br>
<br>
And the bonus-question: if this is possible, are validation-pattern<br>
taken into account within GROUP or FILTER?<br>
<br>
Looking forward to your suggestions.<br>
<br>
TIA<br>
<br>
Best regards<br>
<br>
Stephan<br>
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Stephan Holl <<a href="mailto:stephan.holl@intevation.de">stephan.holl@intevation.de</a>> | Tel.: <a href="tel:%2B49%20%280%29541-33%20508%203663" value="+49541335083663">+49 (0)541-33 508 3663</a><br>
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<br></blockquote></div><br></div>