poly.counts: Number of Points in Each Polygon
In GISTools: Further Capabilities in Geographic Information Science

Point in Polygon Counts

R Documentation

Number of Points in Each Polygon

Description

Given a set of points, and a set of polygons, computes the number of points in each polygon.

Usage

poly.counts(pts, polys)

Arguments

`pts`	A `SpatialPoints` or `SpatialPointsDataFrame` `sf` - POINT object .
`polys`	A `SpatialPolygons` or `SpatialPolygonsDataFrame` or `sf` -POLYGON or - MULTIPOLYGON object.

Value

A list of integers of the same length as the number of polygons in polys, giving the number of points from pts.

Author(s)

Chris Brunsdon, Binbin Lu

Examples

# Data for New Haven to use in example
data(newhaven)
# How many breaches of peace in each census block?
n.breach = poly.counts(breach,blocks)
blocks@data$Count.per <- n.breach/poly.areas(blocks)
# Compute densities and map them
choropleth(blocks,"Count.per")

GISTools documentation built on Oct. 3, 2024, 1:08 a.m.