At Armacost Library, books are organized with the Library of Congress classification system, and are grouped together by topic. Because GIS is interdisciplinary, there is no one call number range that covers all materials. The following are ranges you might find useful.
- E 179.5: Historical geography
- G 70.212: Geographic Information Systems
- G 1000-3122: Atlases
- G 3180-9980: Maps
- GA 101-1776: Cartography
- GC 38.5: Marine GIS
- HD 30.213: GIS and business
- HD 101-1395: Land use
- HT 101-395: Urban and regional planning
- QL: Zoology
