nearestPointOnSegment: Get the nearest point on a segment to a given point

Description Usage Arguments Value Author(s) References See Also Examples

View source: R/point_line_distance.R

Description

This function calculates the coordinates of and the distance to the nearest point on a segment to a given point. This function does not work with geographic coordinates.

Usage

1

Arguments

s

A matrix representing the coordinates of the segment. The matrix has 2x2 dimension where each row represents one of the end points.

p

A vector representing the X and Y coordinates of the point.

Value

A vector with three numeric values representing X and Y coordinates of the nearest point on a segment to a given point as well as the distance between both points.

Author(s)

German Carrillo

References

The function was ported to R based on this code: http://pastebin.com/n9rUuGRh

See Also

nearestPointOnLine, snapPointsToLines

Examples

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segment = cbind(c(1,2),c(1,1.5))
point = c(1.2,1.5)
nearestPointOnSegment(segment, point)

Example output

Loading required package: sp
Checking rgeos availability: TRUE
        X         Y  distance 
1.3600000 1.1800000 0.3577709 

maptools documentation built on Sept. 7, 2021, 5:09 p.m.