Figure 8: Legend on GPS on Bench Marks Web Map Application Site (Photo: National Geodetic Survey)

Using the new “GPS on Bench Marks” interactive map

August 7, 2019

The National Geodetic Survey (NGS) is now developing the 2022 transformation model. Once again, NGS requests the assistance […]

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This article is tagged with bench marks, benchmarks, GPS benchmarks, GPS on Bench Marks Program, National Geodetic Survey, 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 Beta Geoid18 Web Map, David 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

Sources: Esri, DeLorme, USGS, NPS, NOAA

NGS to perform another Multi-Year CORS Solution

February 6, 2019

The National Geodetic Survey (NGS) is performing another Multi-Year CORS Solution (MYCS) of the National CORS. This will […]

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This article is tagged with David B. Zilkoski, International Terrestrial Reference Frame of 2014, ITRF2014, Multi-Year CORS Solution, MYCS, National CORS, National Geodetic Survey, NGS and posted in Opinions

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 model, 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 2018 GPS on BMs program, David B. Zilkoski, GEOID18, GPS on Bench Mark stations, NAPGD2022, National Geodetic Survey, NGS, OPUS, OPUS Shared and posted in Opinions, Survey

Image: National Geodetic Survey

NGS 2018 GPS on BMs program in support of NAPGD2022 — Part 8

August 1, 2018

My last two columns (NGS 2018 GPS on BMs program in support of NAPGD2022 — Part 6 and […]

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This article is tagged with David B. Zilkoski, GEOID12B, GEOID18, GPS on BMs program, NAPGD2022, National Geodetic Survey, NAVD 88, NGS 2018, OPUS and posted in Opinions, Survey

Click to enlarge. (Image: NGS)

NGS 2018 GPS on BMs program in support of NAPGD2022 — Part 7

June 6, 2018

My last column described the National Geodetic Survey’s (NGS) GPS on Bench Marks (BM) 2018 interactive web map, […]

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This article is tagged with 2018 GPS on BMs program, David B. Zilkoski, GPS on Bench Marks Program, National Geodetic Survey, NGS, OPUS and posted in Opinions, Survey