多边形(polygon)

> npm install @turf/helpers

Creates a Polygon Feature from an Array of LinearRings.

接收一个二维数组坐标，创建面要素(Feature<Polygon>)

参数

参数	类型	描述
coordinates	Array	任意二维数组坐标
properties	Object	出参的 properties 属性
options	Object	可配置项

options选项

属性	类型	默认值	描述
bbox	(Array)		边界框
id	(string|number)		标识符

返回

Feature <Polygon> - Polygon Feature

Feature <Polygon> - 面要素

示例

var polygon = turf.polygon(
  [
    [
      [-5, 52],
      [-4, 56],
      [-2, 51],
      [-7, 54],
      [-5, 52]
    ]
  ],
  { id: "poly1" }, // properties
  { id: "poly2" }
);
/*
{
  type: "Feature",
  geometry: {
    type: "Polygon",
    coordinates: [
      [
        [-5, 52],
        [-4, 56],
        [-2, 51],
        [-7, 54],
        [-5, 52]
      ]
    ]
  },
  properties: {
    id: "poly1"
  },
  id: "poly2"
}
*/