var origin = [-20037700, 33711400];//图层起点坐标

var resolutions = [

    8466.6836000338681, // Level 0

    4233.341800016934, // Level 1

    2116.670900008467, // Level 2

    1058.3354500042335, // Level 3

    529.16772500211675 // Level 4

];

var crs = new L.Proj.CRS(

    '',

    '+proj=cea +lon_0=0 +lat_ts=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs' , {

        origin:  origin,

        resolutions: resolutions

    }

);

        var map = L.map('map',{

    crs: crs,

    continuousWorld: true,

    worldCopyJump: false

}).setView([23.39552, 113.308189], 0);  

var tileLayer = new L.TileLayer.TileLoad('http://localhost:8080/resources/china', {

              maxZoom: resolutions.length - 1,

              minZoom: 0,

              continuousWorld: true

          });

tileLayer.addTo(map);  

/**

 * 加载本地arcgis切片类

 *

 * @author ful

 * @date 2014-09-03

 * @copyright (c)

 */  

/**

 * 继承自TileLayer

 * @param {Object} tomcat中映射该切片目录url

 * @param {Object} options

 */

L.TileLayer.TileLoad = L.TileLayer.extend({

    initialize: function (url, options) {

        options = L.setOptions(this, options);

        this.url = url + "/Layers/_alllayers/{z}/{x}/{y}.png";

        L.TileLayer.prototype.initialize.call(this, this.url, options);

    }

});  

/**

 * 重写TileLayer中获取切片url方法

 * @param {Object} tilePoint

 */

L.TileLayer.prototype.getTileUrl = function(tilePoint) {

    return L.Util.template(this._url, L.extend({

        s: this._getSubdomain(tilePoint),

        z: function() {

            var value = tilePoint.z.toString(16);

            return "L" + pad(value, 2);

        },

        x: function() {

            var value = tilePoint.y.toString(16);

            return "R" + pad(value, 8);

        },

        y: function() {

            var value = tilePoint.x.toString(16);

            return "C" + pad(value, 8);

        }

    }));

};  

L.tileLayer.tileLoad = function(url, options){

  return new L.TileLayer.TileLoad(url, options);

};  

/**

 * 高位补全方法

 * @param {Object} 数字类型字符串

 * @param {Object} 总位数，不足则高位补0

 */

var pad = function(numStr, n) {

    var len = numStr.length;

    while(len < n) {

        numStr = "0" + numStr;

        len++;

    }

    return numStr;

};  

       // 扩展加载ArcServer本地缓存的服务

        L.TileLayer.ArcServerTileLoad = L.TileLayer.extend({

            getTileUrl: function(tilePoint) {

                var oo = "00000000";

                var xx = tilePoint.x.toString(16);

                xx = "C" + oo.substring(0, 8 - xx.length) + xx;

                //var yy = (tilePoint.y - Math.pow(2, tilePoint.z - 2)).toString(16); //这里减去偏移值

                var yy = tilePoint.y.toString(16);

                yy = "R" + oo.substring(0, 8 - yy.length) + yy;

                //z如果小于10的时候处理下

                if(tilePoint.z.toString().length == 1) {

                    tilePoint.z = '0' + tilePoint.z.toString();

                }

                return L.Util.template(this._url, L.extend({

                    s: this._getSubdomain(tilePoint),

                    z: "L" + tilePoint.z,

                    x: xx,

                    y: yy

                }, this.options));

            }

        });

        L.tileLayer.arcServerTileLoad = function(url, options){

            return new L.TileLayer.ArcServerTileLoad(url, options);

        };

        //return this.baseLayer = L.tileLayer.arcServerTileLoad(url);