In this week's build, we have simplified the process of downloading multiple offline maps for Android, including topo maps, aerial photography, and other map sources.
As always, it's good to choose a map source for preview when you start BackCountry Navigator. The map that you preview can be different than the one you want to download, if desired.
Next, it is helpful to center the map on a place where you might want to spend time in the outdoors. Use the menu item, Find Places.
Toggle the select button and drag your finger to select an area.
The button that looks like a pencil on a CD will allow you to select map sources to download as offline maps.
You can select additional map sources and press the "Begin Download" button to add them to the queue. When you press done, you return to the map screen, but can still see an icon indicating a download is in progress.
This map download's progress can be seen in Android's notification area. It can be pressed to cancel or continue progress.
As one layer completes, the next map source is started, until all map layers have been completed. You can choose any of the map sources you have downloaded by choosing Map Src and then Offline Maps.