js多个经纬度坐标获取中心点的经纬度

原创于 2025-01-17 10:34:30 发布 · 640 阅读

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#javascript #前端 #开发语言

js多个经纬度坐标获取中心点的经纬度

const getPointsCalculateCenter = (points) => {
  let point_num = points.length; //坐标点个数
  let X = 0,
    Y = 0,
    Z = 0;
  for (let i = 0; i < points.length; i++) {
    if (points[i] == "") {
      continue;
    }
    let point = points[i];
    let lat, lng, x, y, z;
    lat = (parseFloat(point[0]) * Math.PI) / 180;
    lng = (parseFloat(point[1]) * Math.PI) / 180;
    x = Math.cos(lat) * Math.cos(lng);
    y = Math.cos(lat) * Math.sin(lng);
    z = Math.sin(lat);
    X += x;
    Y += y;
    Z += z;
  }
  X = X / point_num;
  Y = Y / point_num;
  Z = Z / point_num;
  let tmp_lng = Math.atan2(Y, X);
  let tmp_lat = Math.atan2(Z, Math.sqrt(X * X + Y * Y));
  return [(tmp_lat * 180) / Math.PI, (tmp_lng * 180) / Math.PI];
};

// 使用
const pos = [
	[135.24541, 46.54521],
	[138.24541, 42.54521],
	[145.24541, 42.54521],
	[155.24541, 43.54521],
	[125.24541, 45.54521],
]
const center = getPointsCalculateCenter(pos);