calcpoint: Calculates the x and y coordinates of a point along a line

In trevorjwilli/streamgradientR: Calculates stream gradient using spatial points, lines, and a DEM

Description

Calculates the x and y coordinates of a point along a line

Usage

calcpoint(points, distp)

Arguments

points	A 2x4 matrix where the first two columns specify the x and y values for the endpoints of a line, the third column is the, segment distance for the segment where the point is the ending segment, and the fourth column specifies the distance that vertex is along the whole line (0 if it is the beginning of a line)
distp	The distance along the entire line of the point to be calculated

Details

This calculates the distance along a line using the output from the getdists() function using vector algebra. See https://math.stackexchange.com/questions/175896/finding-a-point-along-a-line-a-certain-distance-away-from-another-point for a mathematical explanation

trevorjwilli/streamgradientR documentation built on Dec. 31, 2020, 8:46 a.m.