pointsPolylineD: closest points in a polyline to a set of points

In SpatialGraph: The SpatialGraph Class and Utilities

closest points in a polyline to a set of points

Description

pointsPolylineD returns a list with a number of components from a points to polyline analysis

Usage

pointsPolylineD(xy, xyp)

Arguments

xy	n x 2 [x,y] matrix defining the polyline
xyp	p x 2 [x,y] matrix with a point set

Details

pointsPolylineD conducts a detailed points to polyline distance analysis. First the distance from the set of points to the lines defined by every single segment in the polyline is obtained by succesive calls to pointLineD, then the distance to every single node in the polyline are also obtained. The lower distance is chosen.

Value

A data.frame with the columns: inode is the index of the first node in the closest segment to each point, x0 and y0 are the corresponding coordinates of those nodes, xc and yc are the coordinates of the point in the polyline closest to each point in xyp, these may be but are not necessarily one the polyline nodes, dis it the distance from each point tho the polyline, chain0 is the chainage of x0,y0 with the polyline, and dc is the differential chainage from xc,yc to x0,y0

See Also

Spatial-class

SpatialGraph documentation built on Sept. 28, 2023, 5:08 p.m.