Datum of GNSS (GPS) receivers

4 Nov 2021

Note: This information is only provided as a general reference and does not imply that Juniper Systems will provide full support for any specific GIS or other mapping system based on any specific datum, coordinate system, projection, or other references.

GNSS (GPS) receivers such as the Juniper Systems Geode and the u-Blox NEO M8 series (integrated into our Mesa 3 Windows and other rugged handheld computers) follow the NMEA 4.1 standard. Generally, when using these receivers with SBAS they provide data based on ITRF-2000 Current Epoch which is basically equivalent to WGS-84. For further technical details, see ublox Geodetic Coordinate Systems and Ellipsoids.

If you are using NTRIP corrections within the USA (such as with the Juniper Systems Geode), in general, the datum may be equivalent to NAD-83.

If you need to reference a specific map while in the field that uses a datum not based on a WGS-84 (or NAD-83) equivalent global frame, some GPS/GIS field data collection apps that allow this include the following.

If needed, we can provide more options if you contact us at support@junipersys.com.

For information on how to apply a Datum Transformation with ESRI ArcGIS Field Maps, see:

Errors can occur when data (or other geo-referenced layers such as background imagery) are loaded using different map systems. For more information, see Geode appears to be inaccurate in good conditions.

For Uinta, data can initially be imported into Google Earth Pro to automatically convert it, and then the KML file can be imported into Uinta.

Content of article updated 4 Nov 2021, original article from 28 Feb 2020