Design Ramblings

Design Goals

• The spec must be short so developers will be willing to implement it
• Support Android
• Support iOS
• Support for tile caches > 4GB
• Must support Spherical Mercator and WGS84 at least
• Easy to copy between devices and users

Inspiration and References

• MBTiles
• TMS
• WMTS
• MapsForge
• OSM PBF Format