rgeos (version 0.6-3)

gLength: Length of Geometry

Description

Calculates the length of the given geometry.

Usage

gLength(spgeom, byid=FALSE)

Value

Returns the length of the geometry in the units of the current projection. By definition [MULTI]POINTs have a length of 0. The length of POLYGONs is the sum of the length of their shell and their hole(s).

Arguments

spgeom

sp object as defined in package sp

byid

Logical determining if the function should be applied across subgeometries (TRUE) or the entire object (FALSE)

Author

Roger Bivand & Colin Rundel

See Also

gArea

Examples

gLength(readWKT("POINT(1 1)"))

gLength(readWKT("LINESTRING(0 0,1 1,2 2)"))
gLength(readWKT("LINESTRING(0 0,1 1,2 0,3 1)"))

gLength(readWKT("POLYGON((0 0,3 0,3 3,0 3,0 0))"))
gLength(readWKT("POLYGON((0 0,3 0,3 3,0 3,0 0),(1 1,2 1,2 2,1 2,1 1))"))