Question

Reduce coordinates in any GeoJSON object, similar to Array.reduce()
简化任何GeoJSON对象中的坐标，类似于 Array.reduce() 方法

> npm install @turf/meta

参数

参数	类型	描述
geojson	(FeatureCollection|Geometry|Feature)	任何 GeoJSON 对象
callback	Function	回调函数 (previousValue, currentCoord, coordIndex)
initialValue	(*)	回调函数第一个参数初始值
excludeWrapCoord	boolean	whether or not to include the final coordinate of LinearRings that wraps the ring in its iteration.

返回

• • The value that results from the reduction.

示例

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;
});