p225fig05.34 ARTMAP was successfully used to learn maps of natural terrains with many advantages over those of mapping projects that used AI expert systems.  The advantages are so great that many mapping projects started to use this technology.<BR>||  AI expert system - 1 year: field identification of natural regions; derivation of ad hoc rules for each region by expert geographers; correct 80,000 of 250,000 site labels; 230m (site-level) scale.  ARTMAP system - 1 day: rapid, automatic, no natural regions or rules; confidence map; 30m (pixel-level) scale can see roads; equal accuracy at test sites