Hi Gregor and Roma,
Regarding the background map, it is possible to cache them before going to the field when you have internet connection in the office.
If the app crashes, the cached information should remain but it also depends on the phone and the memory usage as highlighted by Gregor.
It should work in most cases. Here are our recommendations to make it effective:
- Define the size of the grid you wish to fly and move it to the background of the location of interest.
- Move all around the grid in order to load the surrounding tiles.
- Repeat it at different levels zoom. For high level of zoom make sure to cover the area below the grid.
- Wait a bit to between each move to make sure the tiles are loaded properly.
We are aware that in some places, tiles are missing depending on the zoom level. It can be possible to zoom but no tile is displayed or the zoom level is blocked. Unfortunately, only the map provider is responsible for that. Switching from the satellite to the map view might partially solve the problem of the missing background information when adjusting your grid in Pix4Dcapture. It is indeed more up to date than the satellite view.
So far it is not planned to change the provider, but our developers are working on finding a solution that would allow the users to import/save some local maps so that you can easily perform missions when the data are completely outdated or when you are offline for instance.