Yes, you will deploy. You will probably stay behind the wire, however (except for the odd convoy and guard detail). Time spent in garrison there will not be much to do, you will serve as support for training operations (mapping training areas, route recon maps, printing excell spreadsheets on your plotters [big printers]) and spending most of your time preparing for the next deployment (procuring map data, imagery, etc. of your next AO). You don't make TLM/CADRG data (like the kind of maps with contour lines and such), those are made by 21S, the surveyors (correct me if I'm wrong). You will however, take TLM data and make it into a finished map product, same with satellite imagery.
When I left the schoolhouse 5 months ago, you could be stationed at Drum, Korea, Bragg, Campbell, Lewis, Germany, Italy, Hood, Hawaii, and a couple others. Wherever there is a topo slot. There are only about 1,200 of us, and it's a great job, I love it, personally. Out of the army with a 4 year degree in Computer Science or Geography, the civilian job opportunities will offer between 80k and 120k a year + benefits. The major civilian employers work as government contractors, Northrup Grumman, et. al.
Do a monster.com search of Geospatial Analyst (in the D.C. area) and you'll see what I mean.
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