DESCRIPTION

v.concave.hull creates a concave hull around points. Contrary to a convex hull, a concave hull can describe the shape of a point cloud.

EXAMPLES

Creating a convex and a concave hull

Creating a convex and a concave hull around schools_wake in the North Carolina sample dataset: 
v.hull in=schools_wake out=schools_wake_convex
v.concave.hull in=schools_wake out=schools_wake_concave

Convex hull around schools:

convex hull

Concave hull around schools:

concave hull

Creating Alpha shapes

Alpha shapes around points (left: threshold=8; right: threshold=0.5):

Alpha shape threshold=8   Alpha shape threshold=0.5

SEE ALSO

v.hull, v.buffer,, v.kernel

AUTHOR

Markus Metz

Last changed: $Date: 2015-06-03 13:26:54 +0000 (Wed, 03 Jun 2015) $