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 David B. Zilkoski, GEOID18, GNSS, GPS on Bench Mark, NAD 83, National Geodetic Survey, NGS, NGS datasheet, orthometric height and posted in Opinions, Survey

Image: National Geodetic Survey

The differences between published Geoid18 and Geoid12B values in Southern Louisiana

April 1, 2020

My February 2020 column provided an analysis of the differences between the latest published hybrid Geoid18 values provided […]

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This article is tagged with David B. Zilkoski, GEOID12B, GEOID18, GEOID18 Gulf Coast, GPS data, GPS on Bench Marks, National Geodetic Survey, NGS, Southern Louisiana and posted in Opinions, Survey

Image: National Geodetic Survey

The differences between Geoid18 values and NAD 83, NAVD 88 values

February 5, 2020

My last column, December 2019, highlighted the National Geodetic Survey’s (NGS) new Geoid Monitoring Service (GeMS); and, that […]

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This article is tagged with David B. Zilkoski, GEOID18, NAD 83, National Geodetic Survey, NAVD 88, NGS and posted in Opinions, Survey

Example of a Large Difference Between Geoid12B and Geoid18 in Western North Carolina (Screenshot: National Geodetic Survey)

How to use the NGS Beta GEOID18 web map

June 5, 2019

This column discusses the results of the National Geodetic Survey (NGS) beta hybrid Geoid18 model and the differences […]

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This article is tagged with David B. Zilkoski, GEOID12B, GEOID18, GPS on BMs program, hybrid geoid model, National Geodetic Survey, NGS and posted in Opinions, Survey

Photo: National Geodetic Survey

NGS releases beta coordinates and multi-year CORS solution

April 3, 2019

My last column discussed the preliminary results of NGS’ second Multi-Year CORS Beta Solution of the National CORS. […]

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This article is tagged with Beta OPUS Project, CORS solution, David B. Zilkoski, GEOID18, MYCS2 process, National Geodetic Survey, NGS and posted in Featured Stories, Opinions, Survey

Photo: National Geodetic Survey

A look at NGS’ experimental and hybrid geoid models

December 5, 2018

On Aug. 10, the National Geodetic Survey (NGS) released its latest experimental geoid model, xGeoid18. In early 2019, […]

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This article is tagged with David B. Zilkoski, experimental geoid models, GEOID18, hybrid geoid model, NAPGD2022, National Geodetic Survey, NGS, xGeoid18 and posted in Opinions, Survey

Image: National Oceanic and Atmospheric Administration

NGS 2018 GPS on BMs program in support of NAPGD2022 — Part 9

October 3, 2018

The number of GPS on Bench Mark (BM) stations highlighted as complete on the National Geodetic Survey (NGS) […]

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This article is tagged with David B. Zilkoski, GEOID18, GPS on Bench Mark stations, NAPGD2022, National Geodetic Survey, NGS, OPUS, OPUS Shared and posted in Opinions, Survey