Tactile 3-D GPS.

I used to do a lot of fairly extreme hiking, I'd pick a spot on the map I wanted to see or a mountain I had to get to the top of and take off into the bush for days at a time. This got me to thinking about how handy it must be for hikers that have GPS maps of the area they are in, especially topographical maps.
Then I thought why not combine GPS technology with a 3-D pin sculpture, [link] to create a hand held tactile map with real topography. This would let you look at the mountain you are climbing from all sides in real time. Pick an area on the general map and see an enlarged close up of a specific area. I have heard that it's possible to read a persons watch from a satellite so I would imagine that very detailed images of specific locations could be rendered in 3-D.
By making each push rod hollow with a fiber optic core, color coded highlights could accent things like waterways, rock formations and recent slides. Of course one pin would always be highlighted in red signifying your position relative to the terrain.
An added memory feature would allow you to mark locations, like where you left your vehicle, (coulda used this one a few times), or find locations in the deep bush accurately years later, (recently I asked fellow halfbakers for little help on a gold hunting expedition and ended up way, Way off course. Thanks for the help all, there's still gold in them thar hills I just knows it).