Maperitive can export OpenStreetMap maps as a _mbtiles file. You can then convert that with my MapMirage program into a Trekbuddy atlas My MapMirage program is here _ The Maperitive program is on the authers web site here. Maperitive produces very good quality sharp tiles and makes nice maps. It does not require Java. It's only needs Windows dotnet 4 or later to be able to run. It's slow to zoom but you can get around that by using command line text commmands inside the program Maperitive can generate _mbtiles files from the web, a local OSM XML file or a local GPX file. Some example command line text commmands are Reposition the map move-pos x=-l y=52 Export a map area to a _mbtiles file: generate-mbtiles minzoom=5 maxzoom=16 Change the map zoom zoom-map-scale 50000 Full instructions for using the generate-mbtiles command are on the authers web site here. The quickest way to generate an _mbtiles atlas is to dcvwnload the area you want using the OpenStreetMap_Qyerpass API In Maperitive use the load-source command to load the downloaded _ osm file. e.g. load-source "C: Oxford_osm" and then generate the _mbriles file with a generate-mbtiles command.