Opened 2 years ago

Closed 2 years ago

#5168 closed enhancement (fixed)

Add polygon (ConcaveHullOfPolygon) support to ST_ConcaveHull

Reported by: pramsey Owned by: pramsey
Priority: medium Milestone: PostGIS 3.3.0
Component: postgis Version: master
Keywords: Cc:


GEOS ≥ 3.11 has a polygon hull routine that should live under ST_ConcaveHull for the case where the input is polygonal or multipolygonal.

Change History (1)

comment:1 by Paul Ramsey <pramsey@…>, 2 years ago

Resolution: fixed
Status: assignedclosed

In 4ad1e66/git:

Expose GEOS polygonal concave hull in ST_ConcaveHull, closes #5168.

The current concave hull does a "pointwise" hull.
For polygonal inputs, this can result in a hull that does
not cover all the area of the input. The polygonal hull
algorithm ensures that the hull in fact covers all the
input area.

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