Filtering

Filtering allows selecting features that satisfy a specific set of conditions. Filters can be used in several contexts in GeoServer:

• in WMS requests, to select which features should be displayed on a map
• in WFS requests, to specify the features to be returned
• in SLD documents, to apply different symbolization to features on a thematic map.

• Supported filter languages
• Filter Encoding Reference
• ECQL Reference
• Filter functions
• Filter Function Reference