dataserver_qp_23D_zhsj/scripts/vendor/CGCS2000ArcGisMapServerImageryProvider-nohx.js

; (function (Cesium) {

  const coordinate = {
    x_PI: (Math.PI * 3000.0) / 180.0,
    PI: Math.PI,
    ee: 0.00669342162296594323,
    a: 6378245.0,
    projs: {
      '01': 'wgs84', //84坐标
      '02': 'gcj02', //火星坐标
      '03': 'bd09', //百度坐标
      '04': 'utm4', //utm坐标
      '05': 'shcj', //城建坐标
      '06': 'meter', //米制单位
      '07': 'degree' // 度制单位
    },
    epsg: {
      //WGS 84 - WGS84 - World Geodetic System 1984, used in GPS
      '4326': '+proj=longlat +datum=WGS84 +no_defs',
      //WGS 84 / Pseudo-Mercator - Spherical Mercator, Google Maps, OpenStreetMap, Bing, ArcGIS, ESRI
      '3857':
        '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs',
      //CGCS2000 / 3-degree Gauss-Kruger zone 40
      '4528':
        '+proj=tmerc +lat_0=0 +lon_0=120 +k=1 +x_0=40500000 +y_0=0 +ellps=GRS80 +units=m +no_defs'
    },
    bd09_to_gcj02: function (bd_lon, bd_lat) {
      var x = bd_lon - 0.0065
      var y = bd_lat - 0.006
      var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * this.x_PI)
      var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * this.x_PI)
      var gg_lng = z * Math.cos(theta)
      var gg_lat = z * Math.sin(theta)
      return [gg_lng, gg_lat]
    },

    gcj02_to_bd09: function (lng, lat) {
      var z =
        Math.Sqrt(lng * lng + lat * lat) + 0.00002 * Math.Sin(lat * this.x_PI)
      var theta = Math.Atan2(lat, lng) + 0.000003 * Math.Cos(lng * this.x_PI)
      var bd_lng = z * Math.Cos(theta) + 0.0065
      var bd_lat = z * Math.Sin(theta) + 0.006
      return [bd_lng, bd_lat]
    },

    wgs84_to_gcj02: function (lng, lat) {
      if (this.out_of_china(lng, lat)) {
        [lng, lat]
      } else {
        var dlat = this.transformlat(lng - 105.0, lat - 35.0)
        var dlng = this.transformlng(lng - 105.0, lat - 35.0)
        var radlat = (lat / 180.0) * this.PI
        var magic = Math.sin(radlat)
        magic = 1 - this.ee * magic * magic
        var sqrtmagic = Math.sqrt(magic)
        dlat =
          (dlat * 180.0) /
          (((this.a * (1 - this.ee)) / (magic * sqrtmagic)) * this.PI)
        dlng =
          (dlng * 180.0) / ((this.a / sqrtmagic) * Math.cos(radlat) * this.PI)
        var mglat = parseFloat(lat) + parseFloat(dlat)
        var mglng = parseFloat(lng) + parseFloat(dlng)
        return [mglng, mglat]
      }
    },

    gcj02_to_wgs84: function (lng, lat) {
      if (this.out_of_china(lng, lat)) {
        return [lng, lat]
      } else {
        var dlat = this.transformlat(lng - 105.0, lat - 35.0)
        var dlng = this.transformlng(lng - 105.0, lat - 35.0)
        var radlat = (lat / 180.0) * this.PI
        var magic = Math.sin(radlat)
        magic = 1 - this.ee * magic * magic
        var sqrtmagic = Math.sqrt(magic)
        dlat =
          (dlat * 180.0) /
          (((this.a * (1 - this.ee)) / (magic * sqrtmagic)) * this.PI)
        dlng =
          (dlng * 180.0) / ((this.a / sqrtmagic) * Math.cos(radlat) * this.PI)
        var mglat = lat + dlat
        var mglng = lng + dlng
        return [lng * 2 - mglng, lat * 2 - mglat]
      }
    },

    out_of_china: function (lng, lat) {
      // 纬度3.86~53.55,经度73.66~135.05
      return !(lng > 73.66 && lng < 135.05 && lat > 3.86 && lat < 53.55)
    },

    transformlat: function (lng, lat) {
      var ret =
        -100.0 +
        2.0 * lng +
        3.0 * lat +
        0.2 * lat * lat +
        0.1 * lng * lat +
        0.2 * Math.sqrt(Math.abs(lng))
      ret +=
        ((20.0 * Math.sin(6.0 * lng * this.PI) +
          20.0 * Math.sin(2.0 * lng * this.PI)) *
          2.0) /
        3.0
      ret +=
        ((20.0 * Math.sin(lat * this.PI) +
          40.0 * Math.sin((lat / 3.0) * this.PI)) *
          2.0) /
        3.0
      ret +=
        ((160.0 * Math.sin((lat / 12.0) * this.PI) +
          320 * Math.sin((lat * this.PI) / 30.0)) *
          2.0) /
        3.0
      return ret
    },

    transformlng: function (lng, lat) {
      var ret =
        300.0 +
        lng +
        2.0 * lat +
        0.1 * lng * lng +
        0.1 * lng * lat +
        0.1 * Math.sqrt(Math.abs(lng))
      ret +=
        ((20.0 * Math.sin(6.0 * lng * this.PI) +
          20.0 * Math.sin(2.0 * lng * this.PI)) *
          2.0) /
        3.0
      ret +=
        ((20.0 * Math.sin(lng * this.PI) +
          40.0 * Math.sin((lng / 3.0) * this.PI)) *
          2.0) /
        3.0
      ret +=
        ((150.0 * Math.sin((lng / 12.0) * this.PI) +
          300.0 * Math.sin((lng / 30.0) * this.PI)) *
          2.0) /
        3.0
      return ret
    },

    /// <summary>
    /// web墨卡托经纬度转米
    /// </summary>
    /// <param name="lng"></param>
    /// <param name="lat"></param>
    /// <returns></returns>
    degree_to_meter: function (lng, lat) {
      var x = (lng * 20037508.34) / 180
      var y = Math.log(Math.tan(((90 + lat) * this.PI) / 360)) / (this.PI / 180)
      y = (y * 20037508.34) / 180
      return [x, y]
    },

    //Web墨卡托转经纬度
    meter_to_degree: function (x, y) {
      var lon = (x / 20037508.34) * 180
      var lat = (y / 20037508.34) * 180
      lat =
        (180 / this.PI) *
        (2 * Math.atan(Math.exp((lat * this.PI) / 180)) - this.PI / 2)

      return [lon, lat]
    },
    /**
     * @description wgs84坐标转上海城建
     * @time 2020-09-02
     * @author zhb
     * @param {*} x
     * @param {*} y 
     */
    wgs84_to_shcj: function (x, y) {
      let xy = []
      xy = this.shcj_get_UTM_from_WGS(x, y)
      return this.utm_to_shcj4(xy[0], xy[1])
    },

    utm_to_shcj4(x, y) {
      let DX, DY, T, K
      DX = -500199.29965
      DY = -3457078.805985
      T = 0.0000001755
      K = 1.0004000106
      return this.covert_by_four_parm(x, y, DX, DY, T, K)
    },

    shcj_get_UTM_from_WGS: function (lon, lat) {
      let a = 6378137
      let b = 6356752.3142451
      let f = (a - b) / a

      let eSquare = 2 * f - f * f
      let k0 = 0.9996
      let lonOrigin = 121.46714714
      let FN = 0
      // # 确保longtitude位于-180.00----179.9之间
      let lonTemp = lon + 180 - Math.floor((lon + 180) / 360) * 360 - 180
      let latRad = (lat * this.PI) / 180
      let lonRad = (lonTemp * this.PI) / 180
      let lonOriginRad = (lonOrigin * this.PI) / 180
      let e2Square = eSquare / (1 - eSquare)

      let V = a / Math.sqrt(1 - eSquare * Math.pow(Math.sin(latRad), 2))
      let T = Math.pow(Math.tan(latRad), 2)
      let C = e2Square * Math.pow(Math.cos(latRad), 2)
      let A = Math.cos(latRad) * (lonRad - lonOriginRad)
      let M =
        a *
        ((1 -
          eSquare / 4 -
          (3 * Math.pow(eSquare, 2)) / 64 -
          (5 * Math.pow(eSquare, 3)) / 256) *
          latRad -
          ((3 * eSquare) / 8 +
            (3 * Math.pow(eSquare, 2)) / 32 +
            (45 * Math.pow(eSquare, 3)) / 1024) *
          Math.sin(2 * latRad) +
          ((15 * Math.pow(eSquare, 2)) / 256 +
            (45 * Math.pow(eSquare, 3)) / 1024) *
          Math.sin(4 * latRad) -
          ((35 * Math.pow(eSquare, 3)) / 3072) * Math.sin(6 * latRad))

      // # x
      let UTMEasting =
        k0 *
        V *
        (A +
          ((1 - T + C) * Math.pow(A, 3)) / 6 +
          ((5 - 18 * T + Math.pow(T, 2) + 72 * C - 58 * e2Square) *
            Math.pow(A, 5)) /
          120) +
        500000.0
      //  # y
      let UTMNorthing =
        k0 *
        (M +
          V *
          Math.tan(latRad) *
          (Math.pow(A, 2) / 2 +
            ((5 - T + 9 * C + 4 * Math.pow(C, 2)) * Math.pow(A, 4)) / 24 +
            ((61 - 58 * T + Math.pow(T, 2) + 600 * C - 330 * e2Square) *
              Math.pow(A, 6)) /
            720))
      //# 南半球纬度起点为10000000.0m

      UTMNorthing += FN
      let xy = []
      xy[0] = UTMEasting
      xy[1] = UTMNorthing
      return xy
    },

    /**
     * @description 上海城建坐标转wgs84
     * @time 2020-09-02
     * @author zhb
     * @param {*} x
     * @param {*} y
     */
    shcj_to_wgs84: function (x, y) {
      let xy = []
      xy = this.shcj_to_utm4(x, y)
      return this.shcj_get_WGS_from_UTM(xy[0], xy[1])
    },

    shcj_to_utm4: function (x, y) {
      let DX, DY, T, K
      DX = 499999.90104
      DY = 3455696.403019
      T = -0.0000001755
      K = 0.999600149344
      return this.covert_by_four_parm(x, y, DX, DY, T, K)
    },

    //四参数公式
    covert_by_four_parm: function (x, y, dx, dy, a, k) {
      let px = 0
      let py = 0
      px = x * k * Math.cos(a) - y * k * Math.sin(a) + dx
      py = x * k * Math.sin(a) + y * k * Math.cos(a) + dy
      let xy = []
      xy[0] = px
      xy[1] = py
      return xy
    },
    shcj_get_WGS_from_UTM: function (x, y) {
      //WGS84

      let a = 6378137 //椭球体长半轴
      let b = 6356752.3142451 //椭球体短半轴
      //	        double a = 6378245 ;
      //	        double b =6356863.018773047300000000;
      x = 500000 - x
      let k0 = 0.9996
      let e = Math.sqrt(1 - Math.pow(b, 2) / Math.pow(a, 2))
      // # calculate the meridional arc
      let M = y / k0
      //# calculate footprint latitude
      let mu =
        M /
        (a *
          (1 -
            Math.pow(e, 2) / 4 -
            (3 * Math.pow(e, 4)) / 64 -
            (5 * Math.pow(e, 6)) / 256))
      let e1 =
        (1 - Math.pow(1 - Math.pow(e, 2), 1.0 / 2)) /
        (1 + Math.pow(1 - Math.pow(e, 2), 1.0 / 2))

      let J1 = (3 * e1) / 2 - (27 * Math.pow(e1, 3)) / 32
      let J2 = (21 * Math.pow(e1, 2)) / 16 - (55 * Math.pow(e1, 4)) / 32
      let J3 = (151 * Math.pow(e1, 3)) / 96
      let J4 = (1097 * Math.pow(e1, 4)) / 512
      let fp =
        mu +
        J1 * Math.sin(2 * mu) +
        J2 * Math.sin(4 * mu) +
        J3 * Math.sin(6 * mu) +
        J4 * Math.sin(8 * mu)

      // # Calculate Latitude and Longitude

      let e2 = Math.pow(e, 2) / (1 - Math.pow(e, 2))
      let C1 = e2 * Math.pow(Math.cos(fp), 2)
      let T1 = Math.pow(Math.tan(fp), 2)
      let R1 =
        (a * (1 - Math.pow(e, 2))) /
        Math.pow(1 - Math.pow(e * Math.sin(fp), 2), 3.0 / 2)
      //# This is the same as rho in the forward conversion formulas above, but calculated for fp instead of lat.
      let N1 = a / Math.pow(1 - Math.pow(e * Math.sin(fp), 2), 1.0 / 2)
      //# This is the same as nu in the forward conversion formulas above, but calculated for fp instead of lat.
      let D = x / (N1 * k0)

      let Q1 = (N1 * Math.tan(fp)) / R1
      let Q2 = Math.pow(D, 2) / 2
      let Q3 =
        ((5 + 3 * T1 + 10 * C1 - 4 * Math.pow(C1, 2) - 9 * e2) * Math.pow(D, 4)) /
        24
      let Q4 =
        ((61 +
          90 * T1 +
          298 * C1 +
          45 * Math.pow(T1, 2) -
          3 * Math.pow(C1, 2) -
          252 * e2) *
          Math.pow(D, 6)) /
        720
      let lat = ((fp - Q1 * (Q2 - Q3 + Q4)) * 180) / this.PI
      // System.out.println("lat===="+Math.toRadians(fp - Q1*(Q2 - Q3 + Q4)));
      let Q5 = D
      let Q6 = ((1 + 2 * T1 + C1) * Math.pow(D, 3)) / 6
      let Q7 =
        ((5 -
          2 * C1 +
          28 * T1 -
          3 * Math.pow(C1, 2) +
          8 * e2 +
          24 * Math.pow(T1, 2)) *
          Math.pow(D, 5)) /
        120
      let lonmid = 121.46714714
      let lon = lonmid - (((Q5 - Q6 + Q7) / Math.cos(fp)) * 180) / this.PI
      //System.out.println("lon===="+(mMid - Math.toRadians((Q5 - Q6 + Q7)/Math.cos(fp))));
      // System.out.println(lat+","+lon);
      let xy = []
      xy[0] = lon
      xy[1] = lat
      return xy
    },

    wgs84_to_bd09: function (x, y) {
      let ll = this.wgs84_to_gcj02(x, y)
      ll = this.gcj02_to_bd09(ll[0], ll[1])
      return ll
    },
    bd09_to_wgs84: function (x, y) {
      let ll = this.bd09_to_gcj02(x, y)
      ll = this.gcj02_to_wgs84(ll[0], ll[1])
      return ll
    },
    gcj02_to_shcj: function (x, y) {
      let ll = this.gcj02_to_wgs84(x, y)
      ll = this.wgs84_to_shcj(ll[0], ll[1])
      return ll
    },
    shcj_to_gcj02: function (x, y) {
      let ll = this.shcj_to_wgs84(x, y)
      ll = this.wgs84_to_gcj02(ll[0], ll[1])
      return ll
    },
    /**
     * @description 坐标转换转换 01:84,02:高德，03.百度，04，UTM，05，上海城建,06:米制单位
     * @param {} from
     * @param {*} to
     * @param {*} xy
     * @time 2020-09-02
     * @author zhb
     */
    convert_proj_from_to: function (from, to, xy) {
      if (from === to) {
        return xy
      } else {
        let fromProj = this.projs[from]
        let toProj = this.projs[to]
        let targetMethod = `${fromProj}_to_${toProj}`
        return this[targetMethod](xy[0], xy[1])
      }
    }
  }

  class CoordTransform {
    constructor() {
      this.PI = 3.1415926535897932384626;
      this.RADIUS = 6378245.0;
      this.EE = 0.00669342162296594323;
    }

    static WGS84ToSH2000(lng, lat) {
      if (this.out_of_sh(lng, lat)) {
        return [lng, lat];
      } else {
        var templatlng = coordinate.wgs84_to_shcj(lng, lat);
        templatlng = coordinate.meter_to_degree(templatlng[0], templatlng[1])
        return [templatlng[0], templatlng[1]];
      }
    }

    static SH2000ToWGS84(x, y) {
      //墨卡托转经纬度
      var templatlng = coordinate.meter_to_degree(x, y);
      if (this.out_of_sh2000(templatlng[0], templatlng[1])) {
        return [x, y];
      } else {
        templatlng = coordinate.shcj_to_wgs84(x, y);
        return templatlng;
      }
    }

    static SH2000lnglatToWGS84(lng, lat) {
      //墨卡托转经纬度
      if (this.out_of_sh2000(lng, lat)) {
        return [lng, lat];
      } else {
        var templatlng = coordinate.degree_to_meter(lng, lat);
        templatlng = coordinate.shcj_to_wgs84(templatlng[0], templatlng[1]);
        return templatlng;
      }
    }
    /**
     * 判断是否在上海。不在上海不做偏移
     * 118.48721797337146,30.26010209544536,122.69588184110438,32.52150117412529
     * @param lng
     * @param lat
     * @returns {boolean}
     */
    static out_of_sh(lng, lat) {
      lat = +lat;
      lng = +lng;
      return !(lng > 115.487 && lng < 123.696 && lat > 28.260 && lat < 33.521);
    }

    /*
     * 上海坐标系范围判断
     */

    static out_of_sh2000(lng, lat) {
      lat = +lat;
      lng = +lng;
      return !(lng > -12.819008830308748 && lng < 10.125641358030961 && lat > -7.553039281805486 && lat < 8.400473860032621);
    }




    /**
     *
     * @param lng
     * @param lat
     * @returns {number[]}
     */
    static delta(lng, lat) {
      let dLng = this.transformLng(lng - 105, lat - 35);
      let dLat = this.transformLat(lng - 105, lat - 35);
      const radLat = (lat / 180) * this.PI;
      let magic = Math.sin(radLat);
      magic = 1 - this.EE * magic * magic;
      const sqrtMagic = Math.sqrt(magic);
      dLng = (dLng * 180) / ((this.RADIUS / sqrtMagic) * Math.cos(radLat) * this.PI);
      dLat = (dLat * 180) / (((this.RADIUS * (1 - this.EE)) / (magic * sqrtMagic)) * this.PI);
      return [dLng, dLat];
    }

    /**
     *
     * @param lng
     * @param lat
     * @returns {number}
     */
    static transformLng(lng, lat) {
      lat = +lat;
      lng = +lng;
      let ret = 300.0 + lng + 2.0 * lat + 0.1 * lng * lng + 0.1 * lng * lat + 0.1 * Math.sqrt(Math.abs(lng));
      ret += ((20.0 * Math.sin(6.0 * lng * this.PI) + 20.0 * Math.sin(2.0 * lng * this.PI)) * 2.0) / 3.0;
      ret += ((20.0 * Math.sin(lng * this.PI) + 40.0 * Math.sin((lng / 3.0) * this.PI)) * 2.0) / 3.0;
      ret += ((150.0 * Math.sin((lng / 12.0) * this.PI) + 300.0 * Math.sin((lng / 30.0) * this.PI)) * 2.0) / 3.0;
      return ret;
    }

    /**
     *
     * @param lng
     * @param lat
     * @returns {number}
     */
    static transformLat(lng, lat) {
      lat = +lat;
      lng = +lng;
      let ret = -100.0 + 2.0 * lng + 3.0 * lat + 0.2 * lat * lat + 0.1 * lng * lat + 0.2 * Math.sqrt(Math.abs(lng));
      ret += ((20.0 * Math.sin(6.0 * lng * this.PI) + 20.0 * Math.sin(2.0 * lng * this.PI)) * 2.0) / 3.0;
      ret += ((20.0 * Math.sin(lat * this.PI) + 40.0 * Math.sin((lat / 3.0) * this.PI)) * 2.0) / 3.0;
      ret += ((160.0 * Math.sin((lat / 12.0) * this.PI) + 320 * Math.sin((lat * this.PI) / 30.0)) * 2.0) / 3.0;
      return ret;
    }

    // 经纬度转墨卡托
    static transformMercator(lonLat) {
      var mercator = {};
      var x = lonLat.x * 20037508.34 / 180;
      var y = Math.log(Math.tan((90 + lonLat.y) * Math.PI / 360)) / (Math.PI / 180);
      y = y * 20037508.34 / 180;
      mercator.x = x;
      mercator.y = y;
      return mercator;
    }
  }

  Cesium.CoordTransform = CoordTransform;

  /**
   * A tiling scheme for geometry referenced to a {@link WebMercatorProjection}, EPSG:3857.  This is
   * the tiling scheme used by Google Maps, Microsoft Bing Maps, and most of ESRI ArcGIS Online.
   *
   * @alias SHmapMercatorTilingScheme
   * @constructor
   *
   * @param {Object} [options] Object with the following properties:
   * @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid whose surface is being tiled. Defaults to
   * the WGS84 ellipsoid.
   * @param {Number} [options.numberOfLevelZeroTilesX=1] The number of tiles in the X direction at level zero of
   *        the tile tree.
   * @param {Number} [options.numberOfLevelZeroTilesY=1] The number of tiles in the Y direction at level zero of
   *        the tile tree.
   * @param {Cartesian2} [options.rectangleSouthwestInMeters] The southwest corner of the rectangle covered by the
   *        tiling scheme, in meters.  If this parameter or rectangleNortheastInMeters is not specified, the entire
   *        globe is covered in the longitude direction and an equal distance is covered in the latitude
   *        direction, resulting in a square projection.
   * @param {Cartesian2} [options.rectangleNortheastInMeters] The northeast corner of the rectangle covered by the
   *        tiling scheme, in meters.  If this parameter or rectangleSouthwestInMeters is not specified, the entire
   *        globe is covered in the longitude direction and an equal distance is covered in the latitude
   *        direction, resulting in a square projection.
   */
  function SHmapMercatorTilingScheme(options) {
    options = Cesium.defaultValue(options, Cesium.defaultValue.EMPTY_OBJECT);

    this._ellipsoid = Cesium.defaultValue(options.ellipsoid, Cesium.Ellipsoid.WGS84);
    this._numberOfLevelZeroTilesX = Cesium.defaultValue(
      options.numberOfLevelZeroTilesX,
      1
    );
    this._numberOfLevelZeroTilesY = Cesium.defaultValue(
      options.numberOfLevelZeroTilesY,
      1
    );

    this._projection = new Cesium.WebMercatorProjection();

    var oprojection = new Cesium.WebMercatorProjection();

    this._projection.project = function (cartographic, result) {
      result = CoordTransform.WGS84ToSH2000(
        Cesium.Math.toDegrees(cartographic.longitude),
        Cesium.Math.toDegrees(cartographic.latitude)
      );
      result = oprojection.project(new Cesium.Cartographic(Cesium.Math.toRadians(result[0]), Cesium.Math.toRadians(result[1])));
      return new Cesium.Cartesian2(result.x, result.y);
    };

    this._projection.unproject = function (cartesian, result) {
      let cartographic = oprojection.unproject(cartesian);
      result = CoordTransform.SH2000lnglatToWGS84(
        Cesium.Math.toDegrees(cartographic.longitude),
        Cesium.Math.toDegrees(cartographic.latitude)
      );
      return new Cesium.Cartographic(Cesium.Math.toRadians(result[0]), Cesium.Math.toRadians(result[1]));
    };


    if (
      Cesium.defined(options.rectangleSouthwestInMeters) &&
      Cesium.defined(options.rectangleNortheastInMeters)
    ) {
      this._rectangleSouthwestInMeters = options.rectangleSouthwestInMeters;
      this._rectangleNortheastInMeters = options.rectangleNortheastInMeters;
    } else {
      const semimajorAxisTimesPi = this._ellipsoid.maximumRadius * Cesium.Math.PI;
      this._rectangleSouthwestInMeters = new Cesium.Cartesian2(
        -semimajorAxisTimesPi,
        -semimajorAxisTimesPi
      );
      this._rectangleNortheastInMeters = new Cesium.Cartesian2(
        semimajorAxisTimesPi,
        semimajorAxisTimesPi
      );
    }

    const southwest = this._projection.unproject(
      this._rectangleSouthwestInMeters
    );
    const northeast = this._projection.unproject(
      this._rectangleNortheastInMeters
    );
    this._rectangle = new Cesium.Rectangle(
      southwest.longitude,
      southwest.latitude,
      northeast.longitude,
      northeast.latitude
    );
  }

  Object.defineProperties(SHmapMercatorTilingScheme.prototype, {
    /**
     * Gets the ellipsoid that is tiled by this tiling scheme.
     * @memberof SHmapMercatorTilingScheme.prototype
     * @type {Ellipsoid}
     */
    ellipsoid: {
      get: function () {
        return this._ellipsoid;
      },
    },

    /**
     * Gets the rectangle, in radians, covered by this tiling scheme.
     * @memberof SHmapMercatorTilingScheme.prototype
     * @type {Rectangle}
     */
    rectangle: {
      get: function () {
        return this._rectangle;
      },
    },

    /**
     * Gets the map projection used by this tiling scheme.
     * @memberof SHmapMercatorTilingScheme.prototype
     * @type {MapProjection}
     */
    projection: {
      get: function () {
        return this._projection;
      },
    },
  });

  /**
   * Gets the total number of tiles in the X direction at a specified level-of-detail.
   *
   * @param {Number} level The level-of-detail.
   * @returns {Number} The number of tiles in the X direction at the given level.
   */
  SHmapMercatorTilingScheme.prototype.getNumberOfXTilesAtLevel = function (level) {
    return this._numberOfLevelZeroTilesX << level;
  };

  /**
   * Gets the total number of tiles in the Y direction at a specified level-of-detail.
   *
   * @param {Number} level The level-of-detail.
   * @returns {Number} The number of tiles in the Y direction at the given level.
   */
  SHmapMercatorTilingScheme.prototype.getNumberOfYTilesAtLevel = function (level) {
    return this._numberOfLevelZeroTilesY << level;
  };

  /**
   * Transforms a rectangle specified in geodetic radians to the native coordinate system
   * of this tiling scheme.
   *
   * @param {Rectangle} rectangle The rectangle to transform.
   * @param {Rectangle} [result] The instance to which to copy the result, or undefined if a new instance
   *        should be created.
   * @returns {Rectangle} The specified 'result', or a new object containing the native rectangle if 'result'
   *          is undefined.
   */
  SHmapMercatorTilingScheme.prototype.rectangleToNativeRectangle = function (
    rectangle,
    result
  ) {
    const projection = this._projection;
    const southwest = projection.project(Cesium.Rectangle.southwest(rectangle));
    const northeast = projection.project(Cesium.Rectangle.northeast(rectangle));

    if (!Cesium.defined(result)) {
      return new Cesium.Rectangle(southwest.x, southwest.y, northeast.x, northeast.y);
    }

    result.west = southwest.x;
    result.south = southwest.y;
    result.east = northeast.x;
    result.north = northeast.y;
    return result;
  };

  /**
   * Converts tile x, y coordinates and level to a rectangle expressed in the native coordinates
   * of the tiling scheme.
   *
   * @param {Number} x The integer x coordinate of the tile.
   * @param {Number} y The integer y coordinate of the tile.
   * @param {Number} level The tile level-of-detail.  Zero is the least detailed.
   * @param {Object} [result] The instance to which to copy the result, or undefined if a new instance
   *        should be created.
   * @returns {Rectangle} The specified 'result', or a new object containing the rectangle
   *          if 'result' is undefined.
   */
  SHmapMercatorTilingScheme.prototype.tileXYToNativeRectangle = function (
    x,
    y,
    level,
    result
  ) {
    const xTiles = this.getNumberOfXTilesAtLevel(level);
    const yTiles = this.getNumberOfYTilesAtLevel(level);

    const xTileWidth =
      (this._rectangleNortheastInMeters.x - this._rectangleSouthwestInMeters.x) /
      xTiles;
    const west = this._rectangleSouthwestInMeters.x + x * xTileWidth;
    const east = this._rectangleSouthwestInMeters.x + (x + 1) * xTileWidth;

    const yTileHeight =
      (this._rectangleNortheastInMeters.y - this._rectangleSouthwestInMeters.y) /
      yTiles;
    const north = this._rectangleNortheastInMeters.y - y * yTileHeight;
    const south = this._rectangleNortheastInMeters.y - (y + 1) * yTileHeight;

    if (!Cesium.defined(result)) {
      return new Cesium.Rectangle(west, south, east, north);
    }

    result.west = west;
    result.south = south;
    result.east = east;
    result.north = north;
    return result;
  };

  /**
   * Converts tile x, y coordinates and level to a cartographic rectangle in radians.
   *
   * @param {Number} x The integer x coordinate of the tile.
   * @param {Number} y The integer y coordinate of the tile.
   * @param {Number} level The tile level-of-detail.  Zero is the least detailed.
   * @param {Object} [result] The instance to which to copy the result, or undefined if a new instance
   *        should be created.
   * @returns {Rectangle} The specified 'result', or a new object containing the rectangle
   *          if 'result' is undefined.
   */
  SHmapMercatorTilingScheme.prototype.tileXYToRectangle = function (
    x,
    y,
    level,
    result
  ) {
    const nativeRectangle = this.tileXYToNativeRectangle(x, y, level, result);

    const projection = this._projection;
    const southwest = projection.unproject(
      new Cesium.Cartesian2(nativeRectangle.west, nativeRectangle.south)
    );
    const northeast = projection.unproject(
      new Cesium.Cartesian2(nativeRectangle.east, nativeRectangle.north)
    );

    nativeRectangle.west = southwest.longitude;
    nativeRectangle.south = southwest.latitude;
    nativeRectangle.east = northeast.longitude;
    nativeRectangle.north = northeast.latitude;
    return nativeRectangle;
  };

  /**
   * Calculates the tile x, y coordinates of the tile containing
   * a given cartographic position.
   *
   * @param {Cartographic} position The position.
   * @param {Number} level The tile level-of-detail.  Zero is the least detailed.
   * @param {Cartesian2} [result] The instance to which to copy the result, or undefined if a new instance
   *        should be created.
   * @returns {Cartesian2} The specified 'result', or a new object containing the tile x, y coordinates
   *          if 'result' is undefined.
   */
  SHmapMercatorTilingScheme.prototype.positionToTileXY = function (
    position,
    level,
    result
  ) {
    const rectangle = this._rectangle;
    if (!Cesium.Rectangle.contains(rectangle, position)) {
      // outside the bounds of the tiling scheme
      return undefined;
    }

    const xTiles = this.getNumberOfXTilesAtLevel(level);
    const yTiles = this.getNumberOfYTilesAtLevel(level);

    const overallWidth =
      this._rectangleNortheastInMeters.x - this._rectangleSouthwestInMeters.x;
    const xTileWidth = overallWidth / xTiles;
    const overallHeight =
      this._rectangleNortheastInMeters.y - this._rectangleSouthwestInMeters.y;
    const yTileHeight = overallHeight / yTiles;

    const projection = this._projection;

    const webMercatorPosition = projection.project(position);
    const distanceFromWest =
      webMercatorPosition.x - this._rectangleSouthwestInMeters.x;
    const distanceFromNorth =
      this._rectangleNortheastInMeters.y - webMercatorPosition.y;

    let xTileCoordinate = (distanceFromWest / xTileWidth) | 0;
    if (xTileCoordinate >= xTiles) {
      xTileCoordinate = xTiles - 1;
    }
    let yTileCoordinate = (distanceFromNorth / yTileHeight) | 0;
    if (yTileCoordinate >= yTiles) {
      yTileCoordinate = yTiles - 1;
    }

    if (!Cesium.defined(result)) {
      return new Cesium.Cartesian2(xTileCoordinate, yTileCoordinate);
    }

    result.x = xTileCoordinate;
    result.y = yTileCoordinate;
    return result;
  }

  Cesium.SHmapMercatorTilingScheme = SHmapMercatorTilingScheme;

  /**
   * @typedef {Object} CGCS2000ArcGisMapServerImageryProvider.ConstructorOptions
   * 
   * Initialization options for the CGCS2000ArcGisMapServerImageryProvider constructor
   *
   * @property {Resource|String} url The URL of the ArcGIS MapServer service.
   * @property {String} [token] The ArcGIS token used to authenticate with the ArcGIS MapServer service.
   * @property {TileDiscardPolicy} [tileDiscardPolicy] The policy that determines if a tile
   *        is invalid and should be discarded.  If this value is not specified, a default
   *        {@link DiscardMissingTileImagePolicy} is used for tiled map servers, and a
   *        {@link NeverTileDiscardPolicy} is used for non-tiled map servers.  In the former case,
   *        we request tile 0,0 at the maximum tile level and check pixels (0,0), (200,20), (20,200),
   *        (80,110), and (160, 130).  If all of these pixels are transparent, the discard check is
   *        disabled and no tiles are discarded.  If any of them have a non-transparent color, any
   *        tile that has the same values in these pixel locations is discarded.  The end result of
   *        these defaults should be correct tile discarding for a standard ArcGIS Server.  To ensure
   *        that no tiles are discarded, construct and pass a {@link NeverTileDiscardPolicy} for this
   *        parameter.
   * @property {Boolean} [usePreCachedTilesIfAvailable=true] If true, the server's pre-cached
   *        tiles are used if they are available.  If false, any pre-cached tiles are ignored and the
   *        'export' service is used.
   * @property {String} [layers] A comma-separated list of the layers to show, or undefined if all layers should be shown.
   * @property {Boolean} [enablePickFeatures=true] If true, {@link CGCS2000ArcGisMapServerImageryProvider#pickFeatures} will invoke
   *        the Identify service on the MapServer and return the features included in the response.  If false,
   *        {@link CGCS2000ArcGisMapServerImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable features)
   *        without communicating with the server.  Set this property to false if you don't want this provider's features to
   *        be pickable. Can be overridden by setting the {@link CGCS2000ArcGisMapServerImageryProvider#enablePickFeatures} property on the object.
   * @property {Rectangle} [rectangle=Rectangle.MAX_VALUE] The rectangle of the layer.  This parameter is ignored when accessing
   *                    a tiled layer.
   * @property {TilingScheme} [tilingScheme=new GeographicTilingScheme()] The tiling scheme to use to divide the world into tiles.
   *                       This parameter is ignored when accessing a tiled server.
   * @property {Ellipsoid} [ellipsoid] The ellipsoid.  If the tilingScheme is specified and used,
   *                    this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither
   *                    parameter is specified, the WGS84 ellipsoid is used.
   * @property {Credit|String} [credit] A credit for the data source, which is displayed on the canvas.  This parameter is ignored when accessing a tiled server.
   * @property {Number} [tileWidth=256] The width of each tile in pixels.  This parameter is ignored when accessing a tiled server.
   * @property {Number} [tileHeight=256] The height of each tile in pixels.  This parameter is ignored when accessing a tiled server.
   * @property {Number} [maximumLevel] The maximum tile level to request, or undefined if there is no maximum.  This parameter is ignored when accessing
   *                                        a tiled server.
   */

  /**
   * Provides tiled imagery hosted by an ArcGIS MapServer.  By default, the server's pre-cached tiles are
   * used, if available.
   *
   * @alias CGCS2000ArcGisMapServerImageryProvider
   * @constructor
   *
   * @param {CGCS2000ArcGisMapServerImageryProvider.ConstructorOptions} options Object describing initialization options
   *
   * @see BingMapsImageryProvider
   * @see GoogleEarthEnterpriseMapsProvider
   * @see OpenStreetMapImageryProvider
   * @see SingleTileImageryProvider
   * @see TileMapServiceImageryProvider
   * @see WebMapServiceImageryProvider
   * @see WebMapTileServiceImageryProvider
   * @see UrlTemplateImageryProvider
   *
   *
   * @example
   * const esri = new Cesium.CGCS2000ArcGisMapServerImageryProvider({
   *     url : 'https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer'
   * });
   *
   * @see {@link https://developers.arcgis.com/rest/|ArcGIS Server REST API}
   * @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
   */
  function CGCS2000ArcGisMapServerImageryProvider(options) {
    options = Cesium.defaultValue(options, Cesium.defaultValue.EMPTY_OBJECT);

    //>>includeStart('debug', pragmas.debug);
    if (!Cesium.defined(options.url)) {
      throw new Cesium.DeveloperError("options.url is required.");
    }
    //>>includeEnd('debug');

    /**
     * The default alpha blending value of this provider, with 0.0 representing fully transparent and
     * 1.0 representing fully opaque.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultAlpha = undefined;

    /**
     * The default alpha blending value on the night side of the globe of this provider, with 0.0 representing fully transparent and
     * 1.0 representing fully opaque.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultNightAlpha = undefined;

    /**
     * The default alpha blending value on the day side of the globe of this provider, with 0.0 representing fully transparent and
     * 1.0 representing fully opaque.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultDayAlpha = undefined;

    /**
     * The default brightness of this provider.  1.0 uses the unmodified imagery color.  Less than 1.0
     * makes the imagery darker while greater than 1.0 makes it brighter.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultBrightness = undefined;

    /**
     * The default contrast of this provider.  1.0 uses the unmodified imagery color.  Less than 1.0 reduces
     * the contrast while greater than 1.0 increases it.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultContrast = undefined;

    /**
     * The default hue of this provider in radians. 0.0 uses the unmodified imagery color.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultHue = undefined;

    /**
     * The default saturation of this provider. 1.0 uses the unmodified imagery color. Less than 1.0 reduces the
     * saturation while greater than 1.0 increases it.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultSaturation = undefined;

    /**
     * The default gamma correction to apply to this provider.  1.0 uses the unmodified imagery color.
     *
     * @type {Number|undefined}
     * @default undefined
     */
    this.defaultGamma = undefined;

    /**
     * The default texture minification filter to apply to this provider.
     *
     * @type {TextureMinificationFilter}
     * @default undefined
     */
    this.defaultMinificationFilter = undefined;

    /**
     * The default texture magnification filter to apply to this provider.
     *
     * @type {TextureMagnificationFilter}
     * @default undefined
     */
    this.defaultMagnificationFilter = undefined;

    const resource = Cesium.Resource.createIfNeeded(options.url);
    resource.appendForwardSlash();

    if (Cesium.defined(options.token)) {
      resource.setQueryParameters({
        token: options.token,
      });
    }

    this._resource = resource;
    this._tileDiscardPolicy = options.tileDiscardPolicy;

    this._tileWidth = Cesium.defaultValue(options.tileWidth, 256);
    this._tileHeight = Cesium.defaultValue(options.tileHeight, 256);
    this._maximumLevel = options.maximumLevel;
    this._tilingScheme = Cesium.defaultValue(
      options.tilingScheme,
      new Cesium.SHmapMercatorTilingScheme()
    );
    this._useTiles = Cesium.defaultValue(options.usePreCachedTilesIfAvailable, true);
    this._rectangle = Cesium.defaultValue(
      options.rectangle,
      this._tilingScheme.rectangle
    );
    this._layers = options.layers;

    let credit = options.credit;
    if (typeof credit === "string") {
      credit = new Cesium.Credit(credit);
    }
    this._credit = credit;

    /**
     * Gets or sets a value indicating whether feature picking is enabled.  If true, {@link CGCS2000ArcGisMapServerImageryProvider#pickFeatures} will
     * invoke the "identify" operation on the ArcGIS server and return the features included in the response.  If false,
     * {@link CGCS2000ArcGisMapServerImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable features)
     * without communicating with the server.
     * @type {Boolean}
     * @default true
     */
    this.enablePickFeatures = Cesium.defaultValue(options.enablePickFeatures, true);

    this._errorEvent = new Cesium.Event();

    this._ready = false;
    this._readyPromise = Cesium.defer();

    // Grab the details of this MapServer. 
    const that = this;
    let metadataError;

    function metadataSuccess(data) {
      const tileInfo = data.tileInfo;
      if (!Cesium.defined(tileInfo)) {
        that._useTiles = false;
      } else if (!tileInfo.spatialReference.wkid) {
        that._useTiles = false;
      } else {
        that._tileWidth = tileInfo.rows;
        that._tileHeight = tileInfo.cols;
        if (!tileInfo.spatialReference.wkid) {
          tileInfo.spatialReference.wkid = 1001;
        }
        if (
          tileInfo.spatialReference.wkid === 102100 ||
          tileInfo.spatialReference.wkid === 102113
        ) {
          that._tilingScheme = new Cesium.SHmapMercatorTilingScheme();
        } else if (data.tileInfo.spatialReference.wkid === 4326) {
          that._tilingScheme = new Cesium.GeographicTilingScheme({
            ellipsoid: options.ellipsoid,
          });
        } else if (data.fullExtent.spatialReference.wkid === 4490 || data.fullExtent.spatialReference.wkid === 1001) {
          that._tilingScheme = new Cesium.GeographicTilingScheme({
            ellipsoid: options.ellipsoid,
            tileInfo: data.tileInfo,
            rectangle: that._rectangle
          });
          that._tilingScheme._tileInfo = data.tileInfo; //附加自定义属性  
        } else {
          const message = `Tile spatial reference WKID ${data.tileInfo.spatialReference.wkid} is not supported.`;
          metadataError = Cesium.TileProviderError.reportError(
            metadataError,
            that,
            that._errorEvent,
            message,
            undefined,
            undefined,
            undefined,
            requestMetadata
          );
          if (!metadataError.retry) {
            that._readyPromise.reject(new Cesium.RuntimeError(message));
          }
          return;
        }
        that._maximumLevel = data.tileInfo.lods.length - 1;

        if (Cesium.defined(data.fullExtent)) {
          if (
            Cesium.defined(data.fullExtent.spatialReference) &&
            Cesium.defined(data.fullExtent.spatialReference.wkid)
          ) {
            if (
              data.fullExtent.spatialReference.wkid === 102100 ||
              data.fullExtent.spatialReference.wkid === 102113
            ) {
              const projection = new Cesium.WebMercatorProjection();
              const extent = data.fullExtent;
              //{x: 13521978.544776667, y: 3662655.182794742}

              // extent.xmin = extent.xmin + 13521978.544776667;
              // extent.ymin = extent.ymin + 3662655.182794742;
              extent.xmax = extent.xmax + 13521978.544776667;
              extent.ymax = extent.ymax + 3662655.182794742;

              const sw = projection.unproject(
                new Cesium.Cartesian3(
                  Math.max(
                    extent.xmin,
                    -that._tilingScheme.ellipsoid.maximumRadius * Math.PI
                  ),
                  Math.max(
                    extent.ymin,
                    -that._tilingScheme.ellipsoid.maximumRadius * Math.PI
                  ),
                  0.0
                )
              );
              const ne = projection.unproject(
                new Cesium.Cartesian3(
                  Math.min(
                    extent.xmax,
                    that._tilingScheme.ellipsoid.maximumRadius * Math.PI
                  ),
                  Math.min(
                    extent.ymax,
                    that._tilingScheme.ellipsoid.maximumRadius * Math.PI
                  ),
                  0.0
                )
              );
              that._rectangle = new Cesium.Rectangle(
                sw.longitude,
                sw.latitude,
                ne.longitude,
                ne.latitude
              );
            } else if (data.fullExtent.spatialReference.wkid === 4326 || data.fullExtent.spatialReference.wkid === 4490) {
              that._rectangle = Cesium.Rectangle.fromDegrees(
                data.fullExtent.xmin,
                data.fullExtent.ymin,
                data.fullExtent.xmax,
                data.fullExtent.ymax
              );
            } else if (data.fullExtent.spatialReference.wkid === 1001) {
              // var minlatlng = gaussToGeo(data.fullExtent.xmin, data.fullExtent.ymin, 121.2751921);
              // console.log(minlatlng)
              // var maxlatlng = gaussToGeo(data.fullExtent.xmax, data.fullExtent.ymax, 121.2751921);
              that._rectangle = Cesium.Rectangle.fromDegrees(
                106.19840661411284,
                22.72534254352711,
                132.3724776782459,
                39.41964096043237
              );
              console.log(that._rectangle);
            } else {
              const extentMessage = `fullExtent.spatialReference WKID ${data.fullExtent.spatialReference.wkid} is not supported.`;
              metadataError = Cesium.TileProviderError.reportError(
                metadataError,
                that,
                that._errorEvent,
                extentMessage,
                undefined,
                undefined,
                undefined,
                requestMetadata
              );
              if (!metadataError.retry) {
                that._readyPromise.reject(new Cesium.RuntimeError(extentMessage));
              }
              return;
            }
          }
        } else {
          that._rectangle = that._tilingScheme.rectangle;
        }

        // Install the default tile discard policy if none has been supplied.
        if (!Cesium.defined(that._tileDiscardPolicy)) {
          that._tileDiscardPolicy = new Cesium.DiscardMissingTileImagePolicy({
            missingImageUrl: buildImageResource(that, 0, 0, that._maximumLevel)
              .url,
            pixelsToCheck: [
              new Cesium.Cartesian2(0, 0),
              new Cesium.Cartesian2(200, 20),
              new Cesium.Cartesian2(20, 200),
              new Cesium.Cartesian2(80, 110),
              new Cesium.Cartesian2(160, 130),
            ],
            disableCheckIfAllPixelsAreTransparent: true,
          });
        }

        that._useTiles = true;
      }

      if (Cesium.defined(data.copyrightText) && data.copyrightText.length > 0) {
        that._credit = new Cesium.Credit(data.copyrightText);
      }

      that._ready = true;
      that._readyPromise.resolve(true);
      Cesium.TileProviderError.reportSuccess(metadataError);
    }

    function metadataFailure(e) {
      const message = `An error occurred while accessing ${that._resource.url}.`;
      metadataError = Cesium.TileProviderError.reportError(
        metadataError,
        that,
        that._errorEvent,
        message,
        undefined,
        undefined,
        undefined,
        requestMetadata
      );
      that._readyPromise.reject(new Cesium.RuntimeError(message));
    }

    function requestMetadata() {
      const resource = that._resource.getDerivedResource({
        queryParameters: {
          f: "json",
        },
      });
      resource
        .fetchJsonp()
        .then(function (result) {
          metadataSuccess(result);
        })
        .catch(function (e) {
          metadataFailure(e);
        });
    }

    if (this._useTiles) {
      requestMetadata();
    } else {
      this._ready = true;
      this._readyPromise.resolve(true);
    }
  }

  function buildImageResource(imageryProvider, x, y, level, request) {
    let resource;
    if (imageryProvider._useTiles) {
      resource = imageryProvider._resource.getDerivedResource({
        url: `tile/${level}/${y}/${x}`,
        request: request,
      });
    } else {
      const nativeRectangle = imageryProvider._tilingScheme.tileXYToNativeRectangle(
        x,
        y,
        level
      );
      const bbox = `${nativeRectangle.west},${nativeRectangle.south},${nativeRectangle.east},${nativeRectangle.north}`;

      const query = {
        bbox: bbox,
        size: `${imageryProvider._tileWidth},${imageryProvider._tileHeight}`,
        format: "png32",
        transparent: true,
        f: "image",
      };

      if (
        imageryProvider._tilingScheme.projection instanceof Cesium.GeographicProjection
      ) {
        query.bboxSR = 4326;
        query.imageSR = 4326;
      } else {
        query.bboxSR = 3857;
        query.imageSR = 3857;
      }
      if (imageryProvider.layers) {
        query.layers = `show:${imageryProvider.layers}`;
      }

      resource = imageryProvider._resource.getDerivedResource({
        url: "export",
        request: request,
        queryParameters: query,
      });
    }

    return resource;
  }

  Object.defineProperties(CGCS2000ArcGisMapServerImageryProvider.prototype, {
    /**
     * Gets the URL of the ArcGIS MapServer.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {String}
     * @readonly
     */
    url: {
      get: function () {
        return this._resource._url;
      },
    },

    /**
     * Gets the ArcGIS token used to authenticate with the ArcGis MapServer service.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {String}
     * @readonly
     */
    token: {
      get: function () {
        return this._resource.queryParameters.token;
      },
    },

    /**
     * Gets the proxy used by this provider.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Proxy}
     * @readonly
     */
    proxy: {
      get: function () {
        return this._resource.proxy;
      },
    },

    /**
     * Gets the width of each tile, in pixels. This function should
     * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Number}
     * @readonly
     */
    tileWidth: {
      get: function () {
        //>>includeStart('debug', pragmas.debug);
        if (!this._ready) {
          throw new Cesium.DeveloperError(
            "tileWidth must not be called before the imagery provider is ready."
          );
        }
        //>>includeEnd('debug');

        return this._tileWidth;
      },
    },

    /**
     * Gets the height of each tile, in pixels.  This function should
     * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Number}
     * @readonly
     */
    tileHeight: {
      get: function () {
        //>>includeStart('debug', pragmas.debug);
        if (!this._ready) {
          throw new Cesium.DeveloperError(
            "tileHeight must not be called before the imagery provider is ready."
          );
        }
        //>>includeEnd('debug');

        return this._tileHeight;
      },
    },

    /**
     * Gets the maximum level-of-detail that can be requested.  This function should
     * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Number|undefined}
     * @readonly
     */
    maximumLevel: {
      get: function () {
        //>>includeStart('debug', pragmas.debug);
        if (!this._ready) {
          throw new Cesium.DeveloperError(
            "maximumLevel must not be called before the imagery provider is ready."
          );
        }
        //>>includeEnd('debug');

        return this._maximumLevel;
      },
    },

    /**
     * Gets the minimum level-of-detail that can be requested.  This function should
     * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Number}
     * @readonly
     */
    minimumLevel: {
      get: function () {
        //>>includeStart('debug', pragmas.debug);
        if (!this._ready) {
          throw new Cesium.DeveloperError(
            "minimumLevel must not be called before the imagery provider is ready."
          );
        }
        //>>includeEnd('debug');

        return 0;
      },
    },

    /**
     * Gets the tiling scheme used by this provider.  This function should
     * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {TilingScheme}
     * @readonly
     */
    tilingScheme: {
      get: function () {
        //>>includeStart('debug', pragmas.debug);
        if (!this._ready) {
          throw new Cesium.DeveloperError(
            "tilingScheme must not be called before the imagery provider is ready."
          );
        }
        //>>includeEnd('debug');

        return this._tilingScheme;
      },
    },

    /**
     * Gets the rectangle, in radians, of the imagery provided by this instance.  This function should
     * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Rectangle}
     * @readonly
     */
    rectangle: {
      get: function () {
        //>>includeStart('debug', pragmas.debug);
        if (!this._ready) {
          throw new Cesium.DeveloperError(
            "rectangle must not be called before the imagery provider is ready."
          );
        }
        //>>includeEnd('debug');

        return this._rectangle;
      },
    },

    /**
     * Gets the tile discard policy.  If not undefined, the discard policy is responsible
     * for filtering out "missing" tiles via its shouldDiscardImage function.  If this function
     * returns undefined, no tiles are filtered.  This function should
     * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {TileDiscardPolicy}
     * @readonly
     */
    tileDiscardPolicy: {
      get: function () {
        //>>includeStart('debug', pragmas.debug);
        if (!this._ready) {
          throw new Cesium.DeveloperError(
            "tileDiscardPolicy must not be called before the imagery provider is ready."
          );
        }
        //>>includeEnd('debug');

        return this._tileDiscardPolicy;
      },
    },

    /**
     * Gets an event that is raised when the imagery provider encounters an asynchronous error.  By subscribing
     * to the event, you will be notified of the error and can potentially recover from it.  Event listeners
     * are passed an instance of {@link TileProviderError}.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Event}
     * @readonly
     */
    errorEvent: {
      get: function () {
        return this._errorEvent;
      },
    },

    /**
     * Gets a value indicating whether or not the provider is ready for use.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Boolean}
     * @readonly
     */
    ready: {
      get: function () {
        return this._ready;
      },
    },

    /**
     * Gets a promise that resolves to true when the provider is ready for use.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Promise.<Boolean>}
     * @readonly
     */
    readyPromise: {
      get: function () {
        return this._readyPromise.promise;
      },
    },

    /**
     * Gets the credit to display when this imagery provider is active.  Typically this is used to credit
     * the source of the imagery.  This function should not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     * @type {Credit}
     * @readonly
     */
    credit: {
      get: function () {
        return this._credit;
      },
    },

    /**
     * Gets a value indicating whether this imagery provider is using pre-cached tiles from the
     * ArcGIS MapServer.  If the imagery provider is not yet ready ({@link CGCS2000ArcGisMapServerImageryProvider#ready}), this function
     * will return the value of `options.usePreCachedTilesIfAvailable`, even if the MapServer does
     * not have pre-cached tiles.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     *
     * @type {Boolean}
     * @readonly
     * @default true
     */
    usingPrecachedTiles: {
      get: function () {
        return this._useTiles;
      },
    },

    /**
     * Gets a value indicating whether or not the images provided by this imagery provider
     * include an alpha channel.  If this property is false, an alpha channel, if present, will
     * be ignored.  If this property is true, any images without an alpha channel will be treated
     * as if their alpha is 1.0 everywhere.  When this property is false, memory usage
     * and texture upload time are reduced.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     *
     * @type {Boolean}
     * @readonly
     * @default true
     */
    hasAlphaChannel: {
      get: function () {
        return true;
      },
    },

    /**
     * Gets the comma-separated list of layer IDs to show.
     * @memberof CGCS2000ArcGisMapServerImageryProvider.prototype
     *
     * @type {String}
     */
    layers: {
      get: function () {
        return this._layers;
      },
    },
  });

  /**
   * Gets the credits to be displayed when a given tile is displayed.
   *
   * @param {Number} x The tile X coordinate.
   * @param {Number} y The tile Y coordinate.
   * @param {Number} level The tile level;
   * @returns {Credit[]} The credits to be displayed when the tile is displayed.
   *
   * @exception {DeveloperError} <code>getTileCredits</code> must not be called before the imagery provider is ready.
   */
  CGCS2000ArcGisMapServerImageryProvider.prototype.getTileCredits = function (
    x,
    y,
    level
  ) {
    return undefined;
  };

  /**
   * Requests the image for a given tile.  This function should
   * not be called before {@link CGCS2000ArcGisMapServerImageryProvider#ready} returns true.
   *
   * @param {Number} x The tile X coordinate.
   * @param {Number} y The tile Y coordinate.
   * @param {Number} level The tile level.
   * @param {Request} [request] The request object. Intended for internal use only.
   * @returns {Promise.<HTMLImageElement|HTMLCanvasElement>|undefined} A promise for the image that will resolve when the image is available, or
   *          undefined if there are too many active requests to the server, and the request
   *          should be retried later.  The resolved image may be either an
   *          Image or a Canvas DOM object.
   *
   * @exception {DeveloperError} <code>requestImage</code> must not be called before the imagery provider is ready.
   */
  CGCS2000ArcGisMapServerImageryProvider.prototype.requestImage = function (
    x,
    y,
    level,
    request
  ) {
    //>>includeStart('debug', pragmas.debug);
    if (!this._ready) {
      throw new Cesium.DeveloperError(
        "requestImage must not be called before the imagery provider is ready."
      );
    }
    //>>includeEnd('debug');

    level = level;

    return Cesium.ImageryProvider.loadImage(
      this,
      buildImageResource(this, x, y, level, request)
    );
  };

  /**
      /**
       * Asynchronously determines what features, if any, are located at a given longitude and latitude within
       * a tile.  This function should not be called before {@link ImageryProvider#ready} returns true.
       *
       * @param {Number} x The tile X coordinate.
       * @param {Number} y The tile Y coordinate.
       * @param {Number} level The tile level.
       * @param {Number} longitude The longitude at which to pick features.
       * @param {Number} latitude  The latitude at which to pick features.
       * @return {Promise.<ImageryLayerFeatureInfo[]>|undefined} A promise for the picked features that will resolve when the asynchronous
       *                   picking completes.  The resolved value is an array of {@link ImageryLayerFeatureInfo}
       *                   instances.  The array may be empty if no features are found at the given location.
       *
       * @exception {DeveloperError} <code>pickFeatures</code> must not be called before the imagery provider is ready.
       */
  CGCS2000ArcGisMapServerImageryProvider.prototype.pickFeatures = function (
    x,
    y,
    level,
    longitude,
    latitude
  ) {
    //>>includeStart('debug', pragmas.debug);
    if (!this._ready) {
      throw new Cesium.DeveloperError(
        "pickFeatures must not be called before the imagery provider is ready."
      );
    }
    //>>includeEnd('debug');

    if (!this.enablePickFeatures) {
      return undefined;
    }

    const rectangle = this._tilingScheme.tileXYToNativeRectangle(x, y, level);

    let horizontal;
    let vertical;
    let sr;
    if (this._tilingScheme.projection instanceof Cesium.GeographicProjection) {
      horizontal = Cesium.Math.toDegrees(longitude);
      vertical = Cesium.Math.toDegrees(latitude);
      sr = "4326";
    } else {
      const projected = this._tilingScheme.projection.project(
        new Cesium.Cartographic(longitude, latitude, 0.0)
      );
      horizontal = projected.x;
      vertical = projected.y;
      sr = "3857";
    }

    let layers = "visible";
    if (Cesium.defined(this._layers)) {
      layers += `:${this._layers}`;
    }

    const query = {
      f: "json",
      tolerance: 2,
      geometryType: "esriGeometryPoint",
      geometry: `${horizontal},${vertical}`,
      mapExtent: `${rectangle.west},${rectangle.south},${rectangle.east},${rectangle.north}`,
      imageDisplay: `${this._tileWidth},${this._tileHeight},96`,
      sr: sr,
      layers: layers,
    };

    const resource = this._resource.getDerivedResource({
      url: "identify",
      queryParameters: query,
    });

    return resource.fetchJson().then(function (json) {
      const result = [];

      const features = json.results;
      if (!Cesium.defined(features)) {
        return result;
      }

      for (let i = 0; i < features.length; ++i) {
        const feature = features[i];

        const featureInfo = new Cesium.ImageryLayerFeatureInfo();
        featureInfo.data = feature;
        featureInfo.name = feature.value;
        featureInfo.properties = feature.attributes;
        featureInfo.configureDescriptionFromProperties(feature.attributes);

        // If this is a point feature, use the coordinates of the point.
        if (feature.geometryType === "esriGeometryPoint" && feature.geometry) {
          const wkid =
            feature.geometry.spatialReference &&
              feature.geometry.spatialReference.wkid ?
              feature.geometry.spatialReference.wkid :
              4326;
          if (wkid === 4326 || wkid === 4283) {
            featureInfo.position = Cesium.Cartographic.fromDegrees(
              feature.geometry.x,
              feature.geometry.y,
              feature.geometry.z
            );
          } else if (wkid === 102100 || wkid === 900913 || wkid === 3857) {
            const projection = new Cesium.WebMercatorProjection();
            featureInfo.position = projection.unproject(
              new Cesium.Cartesian3(
                feature.geometry.x,
                feature.geometry.y,
                feature.geometry.z
              )
            );
          }
        }

        result.push(featureInfo);
      }

      return result;
    });
  };

  Cesium.CGCS2000ArcGisMapServerImageryProvider = CGCS2000ArcGisMapServerImageryProvider;
}(Cesium));