不同瓦片地图服务概念详解
参考:https://blog.csdn.net/u013929284/article/details/53614281
开源与成熟商业的瓦片地图服务(TMS、WMTS),都有如下共同的特性,基本成为了标准:
(1) 坐标系:WGS84
(2) 投影:墨卡托投影(Marcator,正轴等角圆柱投影)
(3) 当经度范围在[-180,180],投影为正方形时,纬度范围:[-85.05113, 85.05113]
(4) 图片大小:256*256
(5) 图片格式:jpg[有损压缩率高、不透明] png[无损、透明]
OpenStreetMap(格式:png)
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z,x,y (1,0,0) (1,1,0) (1,0,1) (1,1,1)
瓦片地址格式:http://a.tile.openstreetmap.org/9/420/193.png
Cycle Map:http://c.tile.opencyclemap.org/cycle/9/420/193.png
Transport Map:http://b.tile2.opencyclemap.org/transport/9/420/193.png
MapQuest Map:http://otile3.mqcdn.com/tiles/1.0.0/osm/9/420/193.png
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Google Map(卫星地图/地形图:jpg,地图:png)
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x,y,z (0,0,1) (1,0,1) (0,1,1) (1,1,1)
瓦片地址格式:http://mt2.google.cn/vt/lyrs=m@167000000&hl=zh-CN&gl=cn&x=420&y=193&z=9
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Bing Map( 格式:png)
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瓦片地址格式:http://r1.tiles.ditu.live.com/tiles/r132122232001311321.png?g=100&mkt=zh-cn
级数:[1-18]
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Baidu Map(格式:jpg、png)
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x,y,z (0,0,3) (1,0,3) (0,M1,3) (1,M1,3)
瓦片地址格式:http://shangetu1.map.bdimg.com/it/u=x=99092;y=19997;z=19;v=017;type=web&fm=44&udt=20130712
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三维:http://d3.map.baidu.com/resource/mappic/bj/2/3/lv2/1251,1143.jpg?v=001 【z: [lv6-lv1]】
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(lv6,76,70) (lv6,77,70) (lv6,76,71) (lv6,77,71)
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瓦片下载工具
1.太乐地图:ArcTilerDesktopV3.5.rar,http://www.arctiler.com/
2.全能电子地图下载器:MapTileDownloader1.8.3.exe,http://code.google.com/p/maptiledownloader/
3.TileDownloader: http://www.softpedia.com/progDownload/Tile-Downloader-Download-198232.html
http://sourceforge.net/projects/tiledownloader/files/1.3/release1.3-bin.zip/download
坐标转换工具
http://rovertang.com/labs/tileindex/
http://rovertang.com/archives/545
http://rovertang.com/labs/GMAPIv3_Offline/
公式&代码实现:http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames