nearby function

nearby geometries

Identify geometries that are near to each other. Either get the index of all geometries within a certain distance, or the k nearest neighbors, or (with nearest) get the nearest points between two geometries. methods

## S4 method for signature 'SpatVector'
nearby(x, y=NULL, distance=0, k=1, centroids=TRUE, symmetrical=TRUE, method="geo")

## S4 method for signature 'SpatVector'
nearest(x, y, pairs=FALSE, centroids=TRUE, lines=FALSE, method="geo")

Arguments

• x: SpatVector
• y: SpatVector or NULL
• distance: numeric. maximum distance
• k: positive integer. number of neighbors. Ignored if distance > 0
• centroids: logical. Should the centroids of polygons be used?
• symmetrical: logical. If TRUE, a near pair is only included once. That is, if geometry 1 is near to geometry 3, the implied nearness between 3 and 1 is not reported. Ignored if k neighbors are returned
• method: character. One of "geo", "haversine", "cosine". With "geo" the most precise but slower method of Karney (2003) is used. The other two methods are faster but less precise
• pairs: logical. If TRUE pairwise nearest points are returned (only relevant when using at least one SpatVector of lines or polygons
• lines: logical. If TRUE lines between the nearest points instead of (the nearest) points

See Also

distance, relate, adjacent

Returns

matrix

Examples

f <- system.file("ex/lux.shp", package="terra")
v <- vect(f)
nearby(v, distance=12000)