iep-ui/es/toolkits/mapUtils.js

An enterprise-class UI design language and Vue-based implementation

/**
 * 获取多边形的中心点
 * @param {*} lnglatarr
 */
export var getTheAreaCenter = function getTheAreaCenter(lnglatarr) {
  var total = lnglatarr.length;
  var X = 0;
  var Y = 0;
  var Z = 0;
  lnglatarr.forEach(function (item) {
    var lng = item[0] * Math.PI / 180;
    var lat = item[1] * Math.PI / 180;
    var x = Math.cos(lat) * Math.cos(lng);
    var y = Math.cos(lat) * Math.sin(lng);
    var z = Math.sin(lat);
    X += x;
    Y += y;
    Z += z;
  });

  X /= total;
  Y /= total;
  Z /= total;

  var Lng = Math.atan2(Y, X);
  var Hyp = Math.sqrt(X * X + Y * Y);
  var Lat = Math.atan2(Z, Hyp);
  return [Lng * 180 / Math.PI, Lat * 180 / Math.PI];
};

/**
 * 图表默认色值
 * */
export var chartColor = function chartColor() {
  return ['#2962FF', '#03C98C', '#FF8400', '#AA25FF', '#FFD000', '#80D8FF', '#FF8A80', '#B8C32C', '#EA80FC', '#82B1FF'];
};