After working with APRSDroid and Mobilinkd, I found I did not have maps when I did not have an internet connection for my tablet. Luckily there is a way to have off line mapping. I found the solution here! I had to add a file editor from the Google play store so that I could add the map. All in all it is working quite well. I had it out for Field Day and there were a few interested in it. It does look to be a useful tool for SAR or weather spotting.