Great Circle Distance Calculator
Calculate distances using great circles, NOT road distances!
Decimal Degrees to Degrees, Minutes, and Seconds
Converts between decimal degrees and degrees/minutes/seconds and back again
Lat/Long to UTM
Converts latitude/longitude to UTM and UTM to latitude/longitude.
Map Date Codes
Part of the WAML Map Librarian’s Toolbox .
Online Distance and Length Conversion
Convert modern and ancient distance measures.
Cartographic Reference Resources
Among other resources, includes map projections and map scales. Compiled by the map library at the University of Texas at Austin.