Recently, while working on an offline map deployment project, I found that the transfer efficiency was relatively low and offline deployment cumbersome when dealing with massive amounts of scattered tile files. Initially, I considered using a ZIP package for transfer and extraction, but later discovered that a format already existed which implements this concept and does so even better: MBTiles. MBTiles is a map tile storage specification based on an SQLite database. It packages thousands of independent map tiles (PNG, JPG, or vector PBF) into a single .mbtiles file.