VENDORS

Pipestone Mountaineering
Inner Mountain Outfitters
On Rope 1
Bob and Bob's
Karst Sports
Speleobooks
Gonzo Guano Gear
  COMPASS  Cave survey software
Walls  Cave survey software

MAPS and GPS

Google Earth  3-D imaging.  Downloadable program.  MUST have high speed connection.
Terraserver -- Free topo maps and aerial photos
Montana Location Finder -- Free topo maps and aerial photos, This site will also give you precise GPS coordintates in NAD 83 or NAD 27
Montana GIS Cadastral -- Find out who who's permission you need to cross their land
NGS Geodetic Tool Kit -- Declination Calculator and other cartography tools
GPS Reciever Information, Software, Hardware Reviews -- everything about GPS