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Version: 7.2.0

segmentEach

描述​

¥Description

在任何 GeoJSON 对象中迭代 2 顶点线段，类似于 Array.forEach()。（多）点几何体不包含线段，因此在此操作中会忽略它们。

¥Iterate over 2-vertex line segment in any GeoJSON object, similar to Array.forEach() (Multi)Point geometries do not contain segments therefore they are ignored during this operation.

参数​

¥Parameters

名称类型描述
geojsonAllGeoJSON任意 GeoJSON
callbacksegmentEachCallback一个接收 (currentSegment, featureIndex, multiFeatureIndex, geomationIndex, segmentsIndex) 的方法

返回​

¥Returns

void

示例​

¥Examples

var polygon = turf.polygon([
  [
    [-50, 5],
    [-40, -10],
    [-50, -10],
    [-40, 5],
    [-50, 5],
  ],
]);

// Iterate over GeoJSON by 2-vertex segments
turf.segmentEach(
  polygon,
  function (
    currentSegment,
    featureIndex,
    multiFeatureIndex,
    geometryIndex,
    segmentIndex,
  ) {
    //=currentSegment
    //=featureIndex
    //=multiFeatureIndex
    //=geometryIndex
    //=segmentIndex
  },
);

// Calculate the total number of segments
var total = 0;
turf.segmentEach(polygon, function () {
  total++;
});

安装​

¥Installation

$ npm install @turf/meta

import { segmentEach } from "@turf/meta";
const result = segmentEach(...);
$ npm install @turf/turf

import * as turf from "@turf/turf";
const result = turf.segmentEach(...);