GIRAS : a geographic information retrieval and analysis system for handling land use and land cover data /

Autor Mitchell, William B., Guptill, Stephen C., Anderson, K. Eric, Fegeas, Robin G., Hallam, Cheryl A.
Vydáno 1977

An enhanced digital line graph design : a feature-beased data model for digital spatial data bases that represent geographic phenomenon /

Autor Boyko, Kenneth J., Domaratz, Michael A., Fegeas, Robin G., Rossmeissl, Hedy J., Usery, E. Lynn
Vydáno 1990