drawBuffer: Draw a buffer around a point

In peteraharrison/PUCA: Provenancing Using Climate Analogues

Description

A helper function for function seedSource. This function first creates a a polygon of class 'SpatialPolygonsDataFrame' and subsamples the polygon to create a uniform point patten of class 'SpatialPoints' which is retunred to an object.

Usage

drawBuffer(x, y, r, numVert = 1000, n = 20, mask = NULL)

Arguments

x	The longitude coordinate for the centre of the buffer.
y	The latitude coordinate for the centre of the buffer.
r	The radius (in kilometers) of the buffer.
numVert	The number of vertices to create the buffer.
n	The number of uniform points to create within the buffer
mask	Optinal mask shapefile (.shp) used to clip the buffer.

Value

An object of class 'SpatialPoints'

Author(s)

P. A. Harrison

See Also

seedSource, draw.circle, SpatialPolygons, SpatialPolygonsDataFrame, spsample

Examples

#' #load libraries
library(raster)
library(sp)

tmp <- PUCA::drawBuffer(x = 147.4686, y = -42.008, r = 5)
plot(tmp)

peteraharrison/PUCA documentation built on Sept. 16, 2019, 7:56 a.m.