README

turf-isolines

turf isolines module

`turf.isolines(points, z, resolution, breaks)`

Takes a FeatureCollection of points with z values and an array of value breaks and generates isolines. These are commonly used to create elevation maps, but can be used for general data interpolation as well.

Parameters

parameter	type	description
`points`	FeatureCollection	a collection containing only Features with Point geometries
`z`	string	field in properties to contour
`resolution`	number
`breaks`	Array.	at which to draw contours

Example

// 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 isolined = turf.isolines(points, 'z', 15, breaks);
//=isolined

Returns FeatureCollection, isolines

Installation

Requires nodejs.

$ npm install turf-isolines

Tests

$ npm test

turf-isolinesdeprecated

Usage no npm install needed!