Visit ParkNet NPS Geographic Information Systems National Park Service, U.S. Department of the Interior
GPS
Applications

CORPSCON - software for datum and projection conversions
Corpscon 5.x for Windows

NOAA interactive webpage to compute a datum shift between
NAD 27 and NAD 83

Interactive NADCON NAD27<->NAD83

Data Dictionaries, Forms, and Applets, etc. for TerraSync and ArcPAD          
Trimble Data Dictionaries and ESRI ArcPAD Forms/Applets provide a method for standardizing entity attributes during field data collection.