nearestPointOnLine

Description

Takes a Point and a LineString and calculates the closest Point on the (Multi)LineString.

Parameters

Name	Type	Description
lines	Geometry | Feature<LineString | MultiLineString>	lines to snap to
pt	Geometry | Feature<Point> | Array<number>	point to snap from
options?	Object	Optional parameters (default {})
options.units?	string	can be degrees, radians, miles, or kilometers (default 'kilometers')

Returns

Feature<Point> closest point on the line to point. The properties object will contain three values: index: closest point was found on nth line part, dist: distance between pt and the closest point, location: distance along the line between start and the closest point.

Examples

var line = turf.lineString([
  [-77.031669, 38.878605],
  [-77.029609, 38.881946],
  [-77.020339, 38.884084],
  [-77.025661, 38.885821],
  [-77.021884, 38.889563],
  [-77.019824, 38.892368],
]);
var pt = turf.point([-77.037076, 38.884017]);

var snapped = turf.nearestPointOnLine(line, pt, { units: "miles" });

Installation

$ npm install @turf/nearest-point-on-line

import { nearestPointOnLine } from "@turf/nearest-point-on-line";
const result = nearestPointOnLine(...);

$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.nearestPointOnLine(...);