Spatial -

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 Datums Basics IGS08 - International GNSS Service
IGS08 - International GNSS Service PDF Print E-mail


IGS08 epoch 2005.00 was introduced in 2011. 

It is a global (geocentric) system based on GPS/GNSS only and was designed to be are consistent with ITRF2008 positions.  It is not a new datum.  It is an epoch (update) of ITRF2008. The ITRF2008 positions of a particular site may differ from its corresponding IGS08 position but their velocities remain identical.

External link to more about IGS08

NOTE: As positioning technology moves towards a global solution, the term GPS is gradually being replaced by Global Navigation Satellite System (GNSS)

For more on this topic see Google GNSS and read on!