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When to use the group parameter in MapServer?
The CLASS object’s GROUP parameter must be used in combination with CLASSGROUP. Item name in attribute table to use for class lookups. Signals the start of a CLUSTER object. The CLUSTER configuration option provides to combine multiple features from the layer into single (aggregated) features based on their relative positions.
How are features tested in MapServer 7.6.2?
Each feature is tested against each class in the order in which they are defined in the mapfile. The first class that matches the its min/max scale constraints and its EXPRESSION check for the current feature will be used for rendering. This can be controlled with RENDERMODE processing directive.
Can a string be used as a filter in MapServer?
The string is simply a MapServer expression: Native filters are supported through the NATIVE_FILTER PROCESSING key: FILTER ‘where id=234’. But this is no longer supported. Item to use with simple FILTER expressions. OGR and shapefiles only. Template to use after a layer’s set of results have been sent. Multiresult query modes only.
How is expression check used in MapServer 7.6?
The first class that matches the its min/max scale constraints and its EXPRESSION check for the current feature will be used for rendering. This can be controlled with RENDERMODE processing directive. Specify the class’s group that would be considered at rendering time.
When to use spatial subqueries in MapServer?
Note that there are important performance impacts when using spatial subqueries however. Try using MapServer’s FILTER whenever possible instead. You can also see the SQL submitted by forcing an error, for instance by submitting a DATA parameter you know won’t work, using for example a bad column name.
Each feature is tested against each class in the order in which they are defined in the mapfile. The first class that matches the its min/max scale constraints and its EXPRESSION check for the current feature will be used for rendering.
Where do I find the layer name in MapServer?
Can be specified relative to the SHAPEPATH option from the Map Object. If this is an SDE layer, the parameter should include the name of the layer as well as the geometry column, i.e. “mylayer,shape,myversion”.
Which is the debug option in Apache MapServer?
Apache users will see timing details for drawing in Apache’s error_log file. Requires MapServer to be built with the DEBUG=MSDEBUG option (–with-debug configure option). Deprecated since version 6.0: use LAYER METADATA instead. Switch to allow MapServer to return data in GML format.