ST_ConcaveHull

Return the Concave Hull of polygon A, with alpha set to pctConvex[0, 1] in the Delaunay Triangulation method, the concave hull will not contain a hole unless allowHoles is set to true

Signatures

ST_ConcaveHull (A: Geometry, pctConvex: Double)

ST_ConcaveHull (A: Geometry, pctConvex: Double, allowHoles: Boolean)

Parameters

Geometry

required

The input geometry.

Double

required

The pct convex value.

Boolean

The allow holes value.

Return type

The resulting geometry.

Example

SELECT ST_ConcaveHull(ST_GeomFromWKT('POLYGON((175 150, 20 40, 50 60, 125 100, 175 150))'), 1)

POLYGON ((125 100, 20 40, 50 60, 175 150, 125 100))

⌘I

Wherobots Cloud REST API

WherobotsDB

Vector tiles (PMTiles)

Havasu (Iceberg) table management

GeoStats and Map Matching

Rasterflow

Signatures

Parameters

Return type

Example

​Signatures

​Parameters

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​Example

Signatures

Parameters

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Example