需要将这个覆盖物置于地图中间且不超过地图边界的放至最大

计算覆盖物中心点，定为地图中心点

计算覆盖物的最大经纬度，和最小经纬度，测算出实际最长距离，根据距离与zoom对应关系设置zoom

function getAreaCenter(params, info) {
  let code = info.code
  if (!params.target) {
    return;
  }
  let PolygonPath = params.target.getPath();
  let PolygonArr = [];
  PolygonPath.forEach((item) => {
    let path = [item.KL, item.kT];
    PolygonArr.push(path);
  });
  let total = PolygonArr.length;
  if (total <= 0) {
    return;
  }
  let X = 0;
  let Y = 0;
  let Z = 0;
  PolygonArr.forEach((lnglat) => {
    let lng = (lnglat[0] * Math.PI) / 180;
    let lat = (lnglat[1] * Math.PI) / 180;
    let x, y, z;
    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 / total;
  Y = Y / total;
  Z = Z / total;

  let Lng = Math.atan2(Y, X);
  let Hyp = Math.sqrt(X * X + Y * Y);
  let Lat = Math.atan2(Z, Hyp);
  
  let center = [(Lng * 180) / Math.PI, (Lat * 180) / Math.PI];
 let maxL = Math.max(...PolygonArr.map(item=> item[0]))
 let minL = Math.min(...PolygonArr.map(item=> item[0]))
 let maxK = Math.max(...PolygonArr.map(item=> item[1]))
 let minK = Math.min(...PolygonArr.map(item=> item[1]))
 let p1 = [maxL,maxK]
 let p2 = [minL,minK]
 let dis = AMap.GeometryUtil.distance(p1, p2);
let zoom = 12
  let zooms = [[10000,11,],
	[5000,12,],
	[2000,15,],
	[1000,16,],
  [600,16.5,],
	[500,17,],
	[200,18,],
	[100,19,],
	[50,20,],
	[15,21,],
	[10,22,]]
	for(let i = 0;i<zooms.length;i++){
    let item = zooms[i]
    if(dis>item[0]){
      zoom = item[1]
  break
 }
  }
  map.setZoomAndCenter(zoom, center);
}