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TAG: NGS

Photo: NGS

The effects of geoid changes in NGS’s new, modernized 2022 NSRS

June 1, 2022

The new, modernized NSRS has a time-dependent component. This includes the geoid model. 


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Image: Dave Zilkoski

The effects of vertical movement on NGS’s modernized 2022 NSRS

April 6, 2022

This newsletter will address estimates of vertical movement that will have to be accounted for in the new, modernized National Spatial Reference System.


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NGS Regional Geodetic Advisors. (Image: NGS Website)

Estimating heights with subsidence changes using NGS data and tools

June 2, 2021

This column details the potential effects of crustal movement on published heights in various regions of the United […]


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Figure 10 from NOAA Technical Report NOS NGS 67 — Diagram of fictional case study location. The arrows correspond to hypothetical rates of ground subsidence. (Image: NGS)

NGS revises NOAA report on working in the modernized NSRS

April 7, 2021

The National Geodetic Survey (NGS) has revised an important technical document on the modernized National Spatial Reference System […]


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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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