We have a university project that will reconstruct a historical part of an Italian city in 3D. I am thinking of taking some photographs and will also have to explore the site on foot. So, I am considering using a GPS device to get a rough survey of the terrain and to locate my photographs. I have never used GPS before and am looking for an advice on what to buy and which software/workflow to use (I have a Canon 20D). As usual, our budget is limited but we can spend some cash so I would be interested to hear of both consumer-oriented and professional options if possible (even if for the future). A device that could be as precise as reasonably possible, that would be registering altitude, had compass, could incorporate maps and could reliably transfer the information into EXIF (even if not in the field) would be great.
As the task in question is a historical reconstruction, we would have to use detailed, large scale custom maps. Any suggestions as to what software can allow us to use such maps in the GPS device and/or with the generated data would be great too.
Thank you for the ideas.