几何对象累加(geomReduce)

> npm install @turf/meta

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

接收任意 GeoJSON 对象(包括要素集)，遍历它的每个 Geometry 并累加操作。类似于Array.reduce()。

参数

参数	类型	描述
geojson	FeatureCollection|Feature|Geometry	任意 GeoJSON 对象
callback	Function	回调，参数依次是 previousValue、currentGeometry、featureIndex、featureProperties、featureBBox、featureId
initialValue	(*)	初始值

返回

• * - reduce 产生的值

示例

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

turf.geomReduce(features, function (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
  //=previousValue
  //=currentGeometry
  //=featureIndex
  //=featureProperties
  //=featureBBox
  //=featureId
  return currentGeometry
});