Offline vector MapBox map packs
I 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 I utilise the frequently updated OpenStreetMap data, these layers provide streets, rivers, water bodies, parks and other popular features.
For overlays I 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.