lineArc

lineArc函数可以通过指定的圆心、半径、起始角度和终止角度，创建一段弧线段在给定的投影中。

参数

• center (数组类型): 弧线段的圆心坐标，格式为[经度，纬度]，必填项。
• radius (数字类型): 弧线段的半径大小，单位为米，必填项。
• startBearing (数字类型): 弧线段的起始角度，北极点为0度，顺时针旋转，字符型的度数数值或者数值型的角度，必填项。
• endBearing (数字类型): 弧线段的终止角度，与起始角度方向相同，字符型的度数数值或者数值型的角度，必填项。
• options (对象类型): 可选项，其中可以包含以下参数:
  • steps (数字类型): 表示每个拐点之间插入点的数量，插值生成流条线段。默认值为10.

返回值

• 弧线段GeoJSON数据（对象类型）

使用示例

var center = [121.369, 31.234];
var radius = 100000;
var startBearing = 0;
var endBearing = 90;
var options = {steps: 10};

var arc = turf.lineArc(center, radius, startBearing, endBearing, options);

输出结果

{
  "type": "Feature",
  "geometry": {
    "type": "LineString",
    "coordinates": [[121.36900000000444,31.234089217374614],[121.36690105341331,31.235157342340533],[121.36607189608036,31.23576591291903],[121.36529239862147,31.236371361542024],[121.3637881900706,31.236875362134946],[121.36181861161307,31.23714533715367],[121.36009563842783,31.237145104376915],[121.35837266494508,31.237144871600282],[121.35640309260004,31.236874908964757],[121.35489895936986,31.23637109146444],[121.35411946202,31.23576508174073],[121.35328980466881,31.235156597623005],[121.35141691578596,31.23385815452211],[121.35018439109242,31.232585841793703],[121.34921625467534,31.23133322151463],[121.34860053830993,31.2301461566768],[121.34838441500723,31.22907844640063],[121.34860053831118,31.228010736124465],[121.3492162546756,31.226823671286632],[121.35018439109309,31.225571051007557],[121.3514169157866,31.224298738279146],[121.35328980466955,31.222999958639248],[121.35411946202076,31.222391474521523],[121.35489895937061,31.221785464797817],[121.3564030926012,31.2212816472975],[121.3583726649463,31.221011684661976],[121.36009563842907,31.221011451885223],[121.36181861161329,31.221011219108486],[121.36378819,31.221281194127212],[121.36529239855177,31.221785194720134],[121.36607189601059,31.22239164334313],[121.36690105334354,31.22300021392163],[121.36900000000444,31.22406833888755]]
  },
  "properties": {}
}