geomReduce

Reduce geometry in any GeoJSON object, similar to Array.reduce().
减少GeoJSON对象中的几何形状，类似于Array.reduce()。

> npm install @turf/meta

参数

参数	类型	描述
geojson	(FeatureCollection|Feature|Geometry)	任何 GeoJSON 对象
callback	Function	a method that takes (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
initialValue	(*)	Value to use as the first argument to the first call of the callback.

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