geomToCoords: Extract vertex points from spatial polygon or lines object

In adamlilith/birdsEye: Tools for geographic analysis

Description

This function extracts coordinates of vertices of a polygon or line from a SpatialPolygon, SpatialPolygonDataFrame, SpatiaLines, or SpatialLinesDataFrame.

Usage

geomToCoords(x, n = NULL, out = "matrix", removeClose = TRUE)

Arguments

x	SpatialPolygon, SpatialPolygonDataFrame, SpatiaLines, SpatialLinesDataFrame, SpatialPoints, or SpatialPointsDataFrame.
n	NULL or positive integer(s) indicating which sub-polygon(s) or line(s) to extract. The default NULL is to extract points for all vertices of all sub-geometries. To see the number of sub-polygons or lines in an object use countSubGeoms. This is ignored if the object in x is a SpatialPoints* object.
out	Character, either 'matrix' (default) or 'pts', indicating the returned object should either be a matrix with coordinates (default) or an object of class SpatialPoints
removeClose	Logical, if TRUE (default), then remove the last pair of coordinates (for polygons only–ignored if lines). Most spatial polygons have the same set of first and last coordinates to complete the polygon.

Value

A two-column matrix or a SpatialPoints object.

See Also

countSubGeoms, subGeom

Examples

data(mad0)
island <- subGeom(mad0, 1)
pts <- geomToCoords(island, 1)
plot(island)
points(pts)

adamlilith/birdsEye documentation built on May 23, 2020, 4:40 p.m.