rsgeo (version 0.1.7)

cast_geoms: Cast geometries to another type

Description

Cast geometries to another type

Usage

cast_geoms(x, to)

Value

An object of class rsgeo

Arguments

x

an object of class rsgeo

to

a character scalar of the target geometry type. Must be one of "point", "multipoint", "polygon", "multipolygon", "linestring", or "multilinestring".

Details

The below conversions are made available. The left hand column indicates the originating vector class and the right hand column indicates the class that it will can be cast to.

Note that correctness of conversions will not be checked or verified. If you cast an rs_MULTIPOINT to an rs_POLYGON, the validity of the polygon cannot be guaranteed.

Conversions from an rs_POLYGON into an rs_LINESTRING will result in only the exterior ring of the polygon ignoring any interior rings if there are any.

From	To
rs_POINT	rs_MULTIPOINT
rs_MULTIPOINT	rs_POLYGON, rs_MULTIPOLYGON, rs_LINESTRING, rs_MULTILINESTRING
rs_POLYGON	rs_MULTIPOINT, rs_MULTIPOLYGON, rs_LINESTRING, rs_MULTILINESTRING
rs_MULTIPOLYGON	rs_MULTIPOINT, rs_MULTILINESTRING
rs_LINESTRING	rs_MULTIPOINT, rs_MULTILINESTRING, rs_POLYGON
rs_MULTILINESTRING	rs_MULTIPOINT, rs_MULTIPOLYGON

Examples

ply <- geom_polygon(c(0, 1, 1, 0, 0), c(0, 0, 1, 1, 0))
cast_geoms(ply, "linestring")
cast_geoms(ply, "multipoint")