Origins of the Technology
 
 
- Ideas developed over last 10 years
- Early methods used brute force search
- 
- Geographical Analysis Machine (1987)
- Geographical Correlates Exploration Machine (1990)
- Geographical Explanations Machine (1997)
 
- Later versions seek to emulate the brute force results in a fraction of the time
- 
- STAC (1992)
- MAPEX (1995)
- MAPEX-GEM (1998)
 
- User interface and results are common to all