Spatial - Ed.com

NOAA Datums Videos 2014

Differential correction with NA2011 and the newest epoch of NAD83

See our and Datums Basics and GPS Tutorials for the long-awaited results of months of rigorous testing and peer review

Trimble Positions software has replaced Trimble GPS Analyst in ArcGIS 10.1

ALASKA GPS and GIS users - check out Joel Cusick's Datum and Projections presentation Feb 2013

ArcGIS 10.1 - New and Cool improvements see Presentation from Melita Kennedy, ESRI : Projections and Datums Dec 2012

Home GPS Tutorials Request to Trimble
Request to Trimble PDF Print E-mail

This series of pages is in no way meant to assign blame to Trimble, NGS or any agency.  Rather it has sparked communication and revealed the mixed blessings brought by the latest high accuracy receivers, processing and imagery. 

Users trust Trimble.  This trust is not misplaced as it is a very powerful product on which many of us have relied upon for years.  As an international company, Trimble literally has uses across the entire globe.  However, a significant portion of the users are based in NAD83.   Given NAD83(2011) has been adopted as the standard by NGS, USCG real-time beacons, OPUS solutions and the US federal government (i.e. NPS, BLM, USFS and BIA).

We trust Trimble will do the Right Thing for North American users and

move from ITRF00 epoch 1997 to the latest NAD83(2011)… please


Related request: Nightmare on GIS Street