SuperMap iClientforJavascript绘制地圆-china2000坐标系下

核心算法：

 //构建三十六边形
  var points2=new Array();
  for(var i=0;i<=360;i+=10){
      var point=SuperMap.Util.destinationVincenty(new SuperMap.LonLat(116, 39),i,3000);
      points2.push(new SuperMap.Geometry.Point(point.lon, point.lat));
  }
  var linearRings = new SuperMap.Geometry.LinearRing(points2),
  region = new SuperMap.Geometry.Polygon([linearRings]);

  var polygonVector = new SuperMap.Feature.Vector(region);

保障圆的半径横向纵向都是一致的

转载自：https://blog.csdn.net/songhfu/article/details/80761660