The ability to show maps and custom overlays even without internet access is crucial to some applications. 

We have extensive experience creating highly optimised map packs that can provide world, country, state or even city street level accuracy for a wide range of use cases. 

All packs use the popular MapBox vector tile format, and are produced via a mostly automated workflow that can take as input a series of polygons from ESRI SHP or GeoJSON files and produce a .mbtiles file for each region.

For base layers we utilise the frequently updated OpenStreetMap data, these layers provide streets, rivers, water bodies, parks and other popular features. 

For overlays we can convert from most popular formats to the MapBox vector tile format

Multiple packs can be used to provide seamless coverage across a wide area.