PostGIS

ST_Simplify
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ST_Simplify

10.8. Topology Processing

Name

ST_Simplify — Returns a "simplified" geometry version of the given TopoGeometry using the Douglas-Peucker algorithm.

geometry +`*`+ST_Simplify*(`TopoGeometry `tg, float8 tolerance`)`;

Returns a "simplified" geometry version of the given TopoGeometry using the Douglas-Peucker algorithm on each component edge.

Note

The returned geometry may be non-simple or non-valid.

Splitting component edges may help retaining simplicity/validity.

Performed by the GEOS module.

Availability: 2.1.0