coordReduce

Reduce coordinates in any GeoJSON object, similar to Array.reduce()
在GeoJSON对象中减少坐标，类似于Array.reduce()

> npm install @turf/meta

参数

参数	类型	描述
geojson	(FeatureCollection|Geometry|Feature)	任何 GeoJSON 对象
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.

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;
});