SuperMap iClientforJavascript繪製地圓-china2000座標系下

核心算法：

 //構建三十六邊形
  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);

保障圓的半徑橫向縱向都是一致的