User Manual


Once a Map has been configured and rendered on a web page, filters can be applied to layers to change the way the map data is returned from the server.

Examples of these filters include:

  • Buffering (map features are expanded or shrunk)
  • Converting to centroids (map features such as polygons or lines are converted a single point at their centroids).
  • Filtering by text (a text statement is used to filter features based on their attribute values)
  • Filtering or clipping by geometry (map features that are returned are constrained by other features)

Filters can also be used to with the Mapzania QueryEngine.

See the Transforming Layers section for more information on filtering.