Reference Tools
General
- Cartographic Reference Resources (Perry-CastaƱeda Library)
- Martindale's Geoscience Center
- Free Geography Tools
- USGS Library
Coordinate System Converters and Information
- Universal Transverse Mercator(UTM) Grid
- DMAP: UTM Grid Zones of the World
- Different degree formats
- Cool Map Tools
- Coordinate Systems Overview
Distance Calculators
- How Far Is It?
- Surface distance between points of Latitude and Longitude
- Tennessee Distance Calculator (TDOT)
Gazetteers
- Geographic Names Information System (USGS)
- GEOnet Names [NIMA foreign gazetteers]
- Getty Thesaurus of Geographic Names (Getty Research Inst.)
- U.S. Gazetteer (U.S. Census Bureau)
Map Projections
Map Scale
Zip Code
- Look Up a Zip Code (USPS)

