Length of Geometry

Calculates the length of the given geometry.

gLength(spgeom, byid=FALSE)

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)

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).

Author

Roger Bivand & Colin Rundel

See also

gArea

Examples

gLength(readWKT("POINT(1 1)"))
#> [1] 0

gLength(readWKT("LINESTRING(0 0,1 1,2 2)"))
#> [1] 2.828427
gLength(readWKT("LINESTRING(0 0,1 1,2 0,3 1)"))
#> [1] 4.242641

gLength(readWKT("POLYGON((0 0,3 0,3 3,0 3,0 0))"))
#> [1] 12
gLength(readWKT("POLYGON((0 0,3 0,3 3,0 3,0 0),(1 1,2 1,2 2,1 2,1 1))"))
#> [1] 16