TAG: NGS

Experimental Geoid Models 2020 (xGEOID20). (Image: NGS)

NGS releases annual experimental geoid models and gravity interpolation tools

February 3, 2021

My last column highlighted an ArcGIS web application that incorporates various datasets and data layers to assist surveyors […]


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Photo: Trimble

The year 2020 and the surveyor: What we learned

January 6, 2021

If there were ever a time to sit back and reflect on things that have happened in the […]


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Source: Esri ArcGIS GNSS Leveling Web Application

ArcGIS web app incorporates datasets, NGS data layers for surveyors

December 2, 2020

My last column described a new National Geodetic Survey (NGS) webtool for obtaining geodetic information about a passive […]


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Image: National Geodetic Survey

NGS releases beta tool for obtaining geodetic information

October 7, 2020

NGS has developed a new beta tool for obtaining geodetic information about a passive mark in their database. […]


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Auto Mining: A driverless Cat 793F CMD truck leaves an iron ore pit. (Photo: Caterpillar)

The expanded role of positioning through advancements in GNSS

September 14, 2020

Individuals who use GNSS today may not know the significant advancements that have been accomplished over the past […]


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Download the report.

New NGS study examines GIS surveys for airports

August 14, 2020

A new study for the National Geodetic Survey (NGS) reviews and validates airport surveys from a safety perspective. […]


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Figure 2 – Approximate Change Between NAPGD2022 and NGVD 29 Using GPS on BMs Data (units = cm). (Image: National Geodetic Survey)

NGS releases modernized National Spatial Reference System updates

August 5, 2020

The National Geodetic Survey (NGS) recently announced two new items related to the modernized National Spatial Reference System […]


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Image: National Geodetic Survey

Why users will need to perform GNSS occupations as part of a leveling project after 2022

June 3, 2020

This column will address why users will be required to perform GNSS occupations when submitting a leveling project […]


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