turf-line-slice-along

create line segment based on start and end distance on a given line string

turf.lineSliceAlong(line, dist1, dist2, [units=kilometers])

Takes a LineString|line, a specified distance along the line to a start Point, and a specified distance along the line to a stop point and returns a subsection of the line in-between those points.

This can be useful for extracting only the part of a route between two distances.

Parameters

parameter	type	description
line	Feature.<LineString>	input line
dist1	Number	distance along the line to starting point
dist2	Number	distance along the line to ending point
[units=kilometers]	String	optional: can be degrees, radians, miles, or kilometers

Example

var line = {
  "type": "Feature",
  "properties": {},
  "geometry": {
    "type": "LineString",
    "coordinates": [
       [ 7.66845703125, 45.058001435398296 ],
      [ 9.20654296875, 45.460130637921004 ],
      [ 11.348876953125, 44.48866833139467 ],
      [ 12.1728515625, 45.43700828867389 ],
      [ 12.535400390625, 43.98491011404692 ],
      [ 12.425537109375, 41.86956082699455 ],
      [ 14.2437744140625, 40.83874913796459 ],
      [ 14.765625, 40.681679458715635 ]
    ]
  }
};
var start = 12.5;

var stop = 25;

var units = 'miles';

var sliced = turf.lineSliceAlong(start, stop, line, units);

//=line

//=sliced

Returns Feature.<LineString>, sliced line

Installation

Requires nodejs.

$ npm install jvrousseau/turf-line-slice-along

Tests

$ npm test