Package Exports

@turf/isolines

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@turf/isolines) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

@turf/isolines

isolines

Takes points with z-values and an array of value breaks and generates isolines.

Parameters

points FeatureCollection<Point> input points
breaks Array<number> values of zProperty where to draw isolines
zProperty [string] the property name in points from which z-values will be pulled (optional, default 'elevation')
propertiesToAllIsolines [Object] GeoJSON properties passed to ALL isolines (optional, default {})
propertiesPerIsoline [Array<Object>] GeoJSON properties passed, in order, to the correspondent isoline; the breaks array will define the order in which the isolines are created (optional, default [])

Examples

// create random points with random z-values in their properties
var points = turf.random('point', 100, {
  bbox: [0, 30, 20, 50]
});
for (var i = 0; i < points.features.length; i++) {
  points.features[i].properties.z = Math.random() * 10;
}
var breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var isolines = turf.isolines(points, breaks, 'temperature');

//addToMap
var addToMap = [isolines];

Returns FeatureCollection<MultiLineString> a FeatureCollection of MultiLineString features representing isolines

This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.

Installation

Install this module individually:

$ npm install @turf/isolines

Or install the Turf module that includes it as a function:

$ npm install @turf/turf