# 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) 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.

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;
});
Last Updated: 1/19/2021, 10:59:20 AM