I have a Topo map which doesn't show trails, which I'd like. So I found an overlay of trails, and when loaded into my GPS (eTrex 30) it overlays the topo map perfectly. But I can't get the maps to work together in BaseCamp. I can see the topo, and I can see the trails overlay, but can't get them put together. Am I missing something? Can BaseCamp do this or not? If it currently can't, it would be a nice feature to add in. Help is solicited.
BaseCamp cannot show more than one map at the same time.
There is a possible workaround:
You can combine several maps in one file on your device with MapInstall. Normally the maps in this file aren't visible in BaseCamp (when you have your device connected), but with a small adjustment you can make them visible.
For some unknown reasons (but it comes handy in this case) BaseCamp doesn't treat multiple maps in one file as separate ones, but as a single map and does show all contents simultanously.
You can use JaVaWa Device Manager to make the maps in the file visible to BaseCamp.