intersect: Intersection

In terra: Spatial Data Analysis

Description

Intersect the geometries of two SpatVectors.

Intersecting points with points uses the extent of y to get the intersection. Intersecting of points and lines is not supported because of numerical inaccuracies with that. You can use buffer, to create polygons from lines and use these with intersect.

See crop for intersection of a SpatRaster.

Usage

## S4 method for signature 'SpatVector,SpatVector'
intersect(x, y)

## S4 method for signature 'SpatVector,SpatExtent'
intersect(x, y)

## S4 method for signature 'SpatExtent,SpatVector'
intersect(x, y)

## S4 method for signature 'SpatExtent,SpatExtent'
intersect(x, y)

Arguments

x	SpatVector or SpatExtent
y	SpatVector or SpatExtent

Value

Same as x

See Also

union, crop, relate

Examples

e1 <- ext(-10, 10, -20, 20)
e2 <- ext(0, 20, -40, 5)
intersect(e1, e2)

f <- system.file("ex/lux.shp", package="terra")
v <- vect(f)
e <- ext(5.6, 6, 49.55, 49.7)
x <- intersect(v, e)

p <- vect(c("POLYGON ((5.8 49.8, 6 49.9, 6.15 49.8, 6 49.6, 5.8 49.8))", 
"POLYGON ((6.3 49.9, 6.2 49.7, 6.3 49.6, 6.5 49.8, 6.3 49.9))"), crs=crs(v))
values(p) <- data.frame(pid=1:2, area=expanse(p))

y <- intersect(v, p)

terra documentation built on Aug. 20, 2021, 9:07 a.m.