calc_point_distance: Find point certain duration away in a straight line

In mboros1/drivetime: Drive Time Isochrones for R

Description

Function takes a starting point and end point to make a line, then finds a point on that line that would take a certain amount of time to drive to.

Usage

calc_point_distance(start, end, duration)

Arguments

start	starting point in the form of a geocode list, index 1 is longitude, index 2 is latitude
end	end point in the form of a geocode list, index 1 is longitude, index 2 is latitude
duration	drive duration we are looking to find, in minutes

Details

Creates a list of geocodes along a line between the start and end point, and uses a binary search algorithm to find the point that is closest to the correct distance.

Value

geocode of the point that is approximately 'duration' minutes away

Author(s)

Martin Boros

mboros1/drivetime documentation built on May 25, 2019, 9:34 p.m.