The syncing part of this problem could indeed be written as an iPad app, fairly trivially. Present a list of files from an FTP server, let the user select the ones to sync, re-sync when needed, etc.<p>The geolocate part is going to be a lot harder. iOS has the MapKit framework, which makes it easy to draw a map, and put a pin into it for your current location. But using an existing PDF as the background? I'm don't think that's doable without a monumental amount of effort. The original map data is in tiles, so it stands to reason that the PDFs would also have to be tiled appropriately. And that's just the first thing that pops into my head.<p>If you do decide to hire somebody to write such an app, I could do it pretty easily. Here's some of my earlier work:<p><a href="http://www.platinumball.net/portfolio/" rel="nofollow">http://www.platinumball.net/portfolio/</a>