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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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This article is tagged with David B. Zilkoski, experimental geoid models, gravity interpolation tool, National Geodetic Survey, NGS, Survey Scene, xGeoid20 and posted in Opinions, Survey

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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This article is tagged with COVID-19, GNSS receiver, GNSS technology, Leica, Ligado, National Geodetic Survey, NGS, survey, Tim Burch, Topcon, Trimble and posted in Opinions, Survey

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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This article is tagged with ArcGIS, David B. Zilkoski, Esri ArcGIS, GEOID18, GNSS Leveling Web Application, National Geodetic Survey, NGS, NGS GPS on Bench Marks, orthometric heights, survey and posted in Opinions, Survey

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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This article is tagged with beta tool, David B. Zilkoski, GEOID18, GNSS, GPS on Bench Mark, NAD 83, National Geodetic Survey, NGS, NGS datasheet, orthometric height and posted in Opinions, Survey

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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This article is tagged with Continuously Operating Reference Stations, CORS, David B. Zilkoski, GNSS, GNSS-derived coordinates, National Geodetic Survey, NGS, orthometric heights, real-time network, Space Shuttle Radar Topography Mission and posted in Opinions, Survey

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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This article is tagged with aeronautical survey program, Airport Improvement Program, airport survey, ARCBridge Consulting, FAA, GIS, Irv Leveson, National Geodetic Survey, NGS, scoping study and posted in Latest News, Transportation

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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This article is tagged with David B. Zilkoski, modernized NSRS, National Geodetic Survey, National Spatial Reference System, NGS, NSRS and posted in Opinions, Survey

David B. Zilkoski

Number of trained US geodesists at crisis level

July 20, 2020

By David Zilkoski, contributing editor, survey scene I attended The Ohio State University (OSU) to obtain my graduate […]

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This article is tagged with David B. Zilkoski, First Fix, geodesists, geodesy, Google FedEx, location-based services, National Geodetic Survey, navigation, precision agriculture, Smart Cities, The Ohio State University, United States and posted in Opinions, Survey