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• 前端之家
• Sqlite
• MBTiles

1 Features

• Fast
  Transferring an MBTiles file is faster than transferring millions of tile images when loading them onto USB stick,mobile device,or when transferring over a network. The trade-off in database access versus filesystem access when using MBTiles is,in our experience,negligible.
• Offline
  Because MBTiles files are self contained,they can used without an Internet connection.
• Compatible
  Images are stored as blob data,so tiles can be read by most sqlite clients. There are manyimplementations of MBTiles from different organizations -- notablyTileMill,TileStream,Arc2Earth,TileStache,and MapBox for iPad.
• Open
  MBTiles is an open-source specification. The specification text itself requires attribution,but there are absolutely no restrictions or requirements placed on implementations.

2 Example

Download the Haiti Terrain Grey tileset. Then,open the MBTiles file in the sqlite client.

sqlite3 haiti-terrian-grey.mbtiles

Next,run this sql statment.

SELECT * FROM tiles WHERE zoom_level = 5;

This displays a row for each tile on zoom level five.

5|8|17|????

5|8|18|????

5|9|17|????

5|9|18|????

5|10|17|????

5|10|18|????

The ???? characters represents PNG images stored as blob data.

3 Implementations

3.1 Compliant

• python: raster2mb (write)
• python: mbutil (read/write)
• python: landez (write) (uses mbutil)
• python: TileStache (code) (read/write) - a full,high-quality tile server
• Arc2Earth (write)
• python: mapproxy (announcement) (read/write)

3.2 Others

• objc: MapDBImporter (write)
• java/android: MBTilesDroidSpitter (example) (read)
• objc/iPhone: Maptual (read)
• java/Android: Locus (read)
• Windows compatible viewer: MBTilesViewer (read)
• java/Android: Nutiteq SDK

3.3 Applications

• MapBox for iPad (read)
• js: TileMill (write)
• objc: route-me - using theRMMBTilesTileSource connector (example) (read)
• TileMill OS X QuickLook & Spotlight plugins (read)

Last edited by willwhite,September 15,2011