sample.by.poly {sharpshootR} | R Documentation |
Sample a Polygon at Fixed Density
Description
Generate sampling points within a SpatialPolygon object, according to a specified sampling density.
Usage
sample.by.poly(p, n.pts.per.ac=1, min.samples=5,
sampling.type='regular', p4s=NULL)
Arguments
p |
a Polygon object, with coordinates in a projected CRS with units of meters |
n.pts.per.ac |
requested sampling density in points per acre (results will be close) |
min.samples |
minimum requested number of samples per polygon |
sampling.type |
sampling type |
p4s |
a qualified proj4string that will be assigned to sampling points |
Details
This function is typically accessed via some kind of helper function such as constantDensitySampling
.
Value
A SpatialPoints
object.
Note
This function expects that the Polygon
object has coordinates associated with a projected CRS– e.g. units of meters. Invalid geometries may cause errors or yield incorrect sample sizes.
Author(s)
D.E. Beaudette
See Also
[Package sharpshootR version 2.3.1 Index]