leaflet本地加载arcgis切片

时间:2022-06-29 10:22:28
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;
};

最后赋一段extend代码

       // 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);