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It should be available if you downloaded their update software to your computer. I go into it every so often by connecting the gps to the computer thru their software and check for map updates. If the update is large then you will need a larger memory card to handle the updated maps.
Maximize your GPS Memory
Your Garmin StreetPilot 7200 has limited storage space for waypoints, routes, and tracks. Once you reach that limit, your GPS can't hold any more data. Smart ExpertGPS users have figured out how to eke out every last bit of memory space on their Garmin GPS receivers. Before each outdoor adventure or visit to a project site, they use ExpertGPS to back up the contents of their GPS, and then clear the GPS data memory. They can then download as much data as possible onto their GPS (leaving some room for GPS data collection out in the field). When they get back, they use ExpertGPS to upload all of their Garmin waypoints, routes, and tracks onto their computer and save it. Once they've backed up the new data from their GPS, they can clear the memory again, keeping their GPS ready for their next trip.
There is freeware out there provided by the Minnesota Department of Natural Resources that allows Garmin users to download their data in a number of different format. Search "DNRGarmin GPS Application" and follow the instructions. This is great for GIS user because it will download to a shapefile.
It has the ability to upload some data, as well. Although, I suspect there are fewer options for uploading data than, say, Mapsource.
I would say that it has a bit of Umzumbe fever probably from the water it sucked up when you failed to warn me that it was in my pocket when i jumped over board, a bit like a beer can, no upload available