Probably going to go with a better scanner, I was on DIAD 4 before I moved
and ended up starting with Express... I was floored how well the PowerPad devices
scanned in comparison, ripped labels, wrinkles, etc.. not to mention scans at all angles 0º-360º degrees, unlike the diad 0º and 180º Degrees. Speed of scanning as well.
Integration of GPS or even local maps would be simple, since both the DIAD and PowerPad Run on a Palm/Windows shell, you could have your local maps loaded on these devices, and if you ever have a question where something is, look it up, and call it good.(unless it doesn't exist)