Hi everyone,
I'm one of the developers of a free (I'm not spamming ) iPhone and Android app called MakkaMappa. It allows anyone to turn any image into a GPS-enabled map for use on their iPhone, iPad and Android. You can find out more about it on [url]makkamappa.com[/url], but if you want a quick demo then you can go to http://makkamappa.com/maps/707 and click on Try It Out! You can then click anywhere on the Google map and see where you would be on the map of Glasgow in 1896. This is the position that the iPhone/Android would display if you were out with your device at that location. So, essentially, you can walk around 1896's Glasgow.
You can turn literally ANY image into a map, and we think it's perfect for using old maps of now-hidden buildings/tunnels/trainlines as real GPS-enabled maps. We've also had people upload old aerial photos, hand-drawn maps, and hundreds of others.
The app is available as a free (Lite) version, allowing you to download two public maps and any that you make on MakkaMappa.com, and there's a not-too-expensive paid-for version also. Both are available on the Android Market and Apple's App Store - just search for MakkaMappa.
Thanks for taking a look, and let me know if you have any questions!
Michael