coordReduce

Description

Reduce coordinates in any GeoJSON object, similar to Array.reduce()

Parameters

Name	Type	Description
geojson	FeatureCollection | Geometry | Feature	any GeoJSON object
callback	Function	a method that takes (previousValue, currentCoord, coordIndex)
initialValue?	*	Value to use as the first argument to the first call of the callback.
excludeWrapCoord?	boolean	whether or not to include the final coordinate of LinearRings that wraps the ring in its iteration. (default false)

Returns

* The value that results from the reduction.

Examples

var features = turf.featureCollection([
  turf.point([26, 37], { foo: "bar" }),
  turf.point([36, 53], { hello: "world" }),
]);

turf.coordReduce(
  features,
  function (
    previousValue,
    currentCoord,
    coordIndex,
    featureIndex,
    multiFeatureIndex,
    geometryIndex,
  ) {
    //=previousValue
    //=currentCoord
    //=coordIndex
    //=featureIndex
    //=multiFeatureIndex
    //=geometryIndex
    return currentCoord;
  },
);

Installation

$ npm install @turf/meta

import { coordReduce } from "@turf/meta";
const result = coordReduce(...);

$ npm install @turf/turf

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