支持TMS、WMTS标准瓦片下载，支持百度地图瓦片、高德地图瓦片、腾讯地图瓦片、天地图、ArcServer Rest瓦片、ArcServer本地缓存切片、geoserver WMS等瓦片下载。默认以png文件方式保存瓦片，也支持以sqlite（mbtiles格式）保存瓦片，支持瓦片base64编码后以sqlite保存（用于android端离线地图）。
设置mapConfig.json，根据配置项请求瓦片，支持多线程下载，失败续载。下载失败的瓦片用sqlite数据库保存在{savePath}\fails.db，第二次启动程序时会重新下载失败瓦片。程序运行中途退出时，第二次启动程序将会从上次退出的进度继续下载。
{
"resolutions" : [128, 64,32],
"tileSize" : [256,256],
"extent" : [12662882.864568064,2543518.577818389,12761187.939702341,2599303.8005401082],
"origin": [0,0],
"offsetZoom" :11,//resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"type" : "wms",
"url": "http://localhost:8080/geoserver/szgas/wms",
"urlParas" : {
"FORMAT" : "image/png",
"VERSION" : "1.1.1",
"STYLES" : "",
"LAYERS" : "szgas:jd_baidu",
"REQUEST" : "GetMap",
"SRS" : "EPSG:3857",
"TRANSPARENT" : true
},
"runThreadCount" : 5,
"savePath" : "" //不设置保存路径，程序根目录是默认的瓦片保存路径；
//,"output": "file" //不设置output，则默认为png方式保存瓦片；
}
{
"resolutions" : [ 0.703125, 0.3515625, 0.17578125],
"tileSize" : [256,256],
"extent" : [-180.0 -90.0,180.0,90.0],
"origin": [-180,90],
"offsetZoom" :1,//resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"type" : "wmts",
"url": "http://172.16.12.15:8080/dfc/services/ogc/wmts/vec",
"urlParas" : {
"SERVICE" : "WMTS",
"FORMAT" : "image/png",
"VERSION" : "1.0.0",
"STYLES" : "default",
"LAYER" : "vec",
"REQUEST" : "GetTile",
"TileMatrixSet" : "CustomCRS4326Scalevec",
"TRANSPARENT" : true
},
"runThreadCount" : 5,
"savePath" : ""
//,"output": "file" //不设置output，则默认为png方式保存瓦片；
}
{
"resolutions": [ 1.40625, 0.703125, 0.3515625 ],
"tileSize": [ 256, 256 ],
"extent": [ -180, -90, 180, 90 ],
"origin": [ -180, -90 ],
"offsetZoom": 1,//resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"type": "wms",
"url": "http://www.scgis.net.cn/iMap/iMapServer/defaultRest/services/sctilemap/WMS",
"urlParas": {
"FORMAT": "image/png",
"VERSION": "1.1.1",
"STYLES": "",
"LAYERS": "0",
"REQUEST": "GetMap",
"SRS": "EPSG:4326",
"TRANSPARENT": true
},
"runThreadCount": 5,
"savePath": ""
//,"output": "file" //不设置output，则默认为png方式保存瓦片；
}
{
"resolutions": [
0.0013732916427489112,
0.0006866458213744556
],
"tileSize": [ 256, 256 ],
"extent": [ 107.86896617100007, 30.390792641000075, 108.90726196600006, 31.005204326000076 ],
"origin": [ -400.0, 399.9999999999998 ],
"offsetZoom": 0,//resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"type": "ArcServerRest",
"url": "http://222.180.68.94:6080/arcgis/rest/services/wzpsp/wzmap/MapServer/tile/{z}/{y}/{x}",
"runThreadCount": 1,
"savePath": ""
//,"output": "file" //不设置output，则默认为png方式保存瓦片；
}
{
"resolutions": [
0.00015228550437313792,
0.000076142752186568962,
0.000038071376093284481,
0.00001903568804664224,
0.0000095178440233211202
//,0.0000047589220116605601,
//0.0000023794610058302801
],
"tileSize": [ 256, 256 ],
"extent": [ 113.3946038380694, 34.0858360155829, 113.5505441945475, 34.2026389974371 ],
"origin": [ -400.0, 400 ],
"offsetZoom": 3, //resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"type": "ArcServerLocalTile",
"output": "sqlite", //用sqlite保存瓦片；默认是文件方式存储瓦片
"url": "http://192.168.20.34/YZMAP/{z}/{y}/{x}.png",
"runThreadCount": 1,
"savePath": ""
}
{
//"resolutions": [ 128, 64, 32 ],
//"resolutions": [ 262144, 131072, 65536, 32768, 16384, 8192, 4096, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1 ],//完整的resolutions
"resolutions": [ 256,128,64,32,16 ],
"offsetZoom": 10, //resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"tileSize": [ 256,256 ],
"extent": [ 11808770.385317, 3403500.2612752, 11892674.468269, 3442476.25119 ],
"origin": [ 0, 0 ],
"type": "baidu",
"output": "sqlite",//用sqlite保存瓦片；默认是png文件方式存储瓦片
"url": "http://online3.map.bdimg.com/onlinelabel/?qt=tile&styles=pl&udt=20151021&scaler=1&p=1&qt=tile&x={x}&y={y}&z={z}",
"runThreadCount":5
}
{
"resolutions": [
//156543.0339,
//78271.516953125,
//39135.7584765625,
//19567.87923828125,
9783.939619140625
,4891.9698095703125 //测试需要,只下载2级；
//,2445.9849047851562
//,1222.9924523925781
//,611.4962261962891,
//305.74811309814453,
//152.87405654907226,
//76.43702827453613,
//38.218514137268066,
//19.109257068634033,
//9.554628534317016,
//4.777314267158508,
//2.388657133579254,
//1.194328566789627,
//0.5971642833948135
],
"offsetZoom": 4, //resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"tileSize": [ 256, 256 ],
"extent": [-20037508.342789244, -20037508.342789244, 20037508.342789244, 20037508.342789244],
"origin": [-20037508.342789244, -20037508.342789244],
"type": "tencent",
"url": "http://rt1.map.gtimg.com/realtimerender?z={z}&x={x}&y={y}&type=vector&style=0&v=1.1.2",
"runThreadCount": 1
//不设置output，则默认为png方式保存瓦片；
}
{
"resolutions": [
//156543.0339,
//78271.516953125,
//39135.7584765625,
19567.87923828125,
9783.939619140625
//,4891.9698095703125 //测试需要,只下载2级；
//,2445.9849047851562
//,1222.9924523925781
//,611.4962261962891,
//305.74811309814453,
//152.87405654907226,
//76.43702827453613,
//38.218514137268066,
//19.109257068634033,
//9.554628534317016,
//4.777314267158508,
//2.388657133579254,
//1.194328566789627,
//0.5971642833948135
],
"offsetZoom": 3, //resolutions如果设置了某一部分级别，必须要设置这个偏移量;
"tileSize": [ 256, 256 ],
"extent": [-20037508.342789244, -20037508.342789244, 20037508.342789244, 20037508.342789244],
"origin": [-20037508.342789244, 20037508.342789244],
"type": "gaode",
"output": "sqliteAndBase64", //用sqlite保存瓦片,瓦片以base64方式编码；
"url": "http://webrd01.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=8&x={x}&y={y}&z={z}",
"runThreadCount": 1
}
瓦片存储路径：{savePath}\Tiles\Zoom+offsetZoom\x\y.png
