To minimize cellular traffic and for convenience it is better to create and download background map in the office:Although, I'm not sure if the new automated maps will work without cellular service
- be sure you have inserted SD card to the Triumph-LS.
- go to background maps list (Projects screen -> Edit current project -> Background Map).
- add a new map using "+" button.
- edit the map using edit button.
- on the edit screen select Mapbox Style.
- push "Download offline map".
- using zoom buttons select required area (the entire scene shown on the map screen).
- press "Download" button and wait while downloading will finished.
It will download all required tiles for the area.