Line Simplification

The LineSimplification operator allows simplifying FeatureCollections of (multi-)lines or (multi-)polygons by removing vertices. Users can select a simplification algorithm and specify an epsilon for parametrization. Alternatively, they can omit the epsilon, which results in the epsilon being automatically determined by the query’s spatial resolution.

Errors

• If epsilon is set but <= 0, an error is thrown.
• If the input is not a MultiPolygon or MultiLineString, an error is thrown.

Parameters

Name	Type	Description	Examples
algorithm	LineSimplificationAlgorithm	Simplification algorithm used to reduce the geometry complexity.	"douglasPeucker"
epsilon	number	Distance threshold for the simplification algorithm.	0.5 1

Sources

Name	Type	Description
vector	VectorOperator	An operator that produces vector data.

Examples

{
    "type": "LineSimplification",
    "params": {
        "algorithm": "douglasPeucker",
        "epsilon": 0.5
    },
    "sources": {
        "vector": {
            "type": "OgrSource",
            "params": {
                "data": "roads"
            }
        }
    }
}