/**
* [模块]TdtTilesLayer-天地图访问类
* @module TdtTilesLayer
*/
define(["dojo/_base/declare",
"esri/layers/tiled"],
function (declare) {
/**
* TdtTilesLayer 构造函数
* @constructor module:TdtTilesLayer
* @param {String} maptype - 图层类型,支持如下类别<br/>
* img：影像<br/>
* cia：影像注记<br/>
* vec：矢量<br>
* cva：矢量注记
* @returns {Class} TdtTilesLayer
* @example
* //天地图影像图
* baseMap = new TdtTilesLayer("img");
* @example
* //天地图影像注记图
* baseMap = new TdtTilesLayer("cia");
* @example
* //天地图矢量图
* baseMap = new TdtTilesLayer("vec");
* @example
* //天地图矢量注记图
* baseMap = new TdtTilesLayer("cva");
*/
var exports = declare(esri.layers.TiledMapServiceLayer, {
_maptype: "",
_tk: "0ae1a281455bf9d462c75b83602e39a3",
constructor: function (maptype) {
this.