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TAG: David B. Zilkoski

Image: National Geodetic Survey

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

June 3, 2020

This article is tagged with , , , and posted in Opinions, Survey
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The differences between published Geoid18 and Geoid12B values in Southern Louisiana

April 1, 2020

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

February 5, 2020

This article is tagged with , , , , , and posted in Opinions, Survey
Figure 27: GRACE Trend over CONUS from UTCSR RL06 Model [mm/yr] (Source: Figure 27 from Technical Report NOS NGS 69)

How NGS can implement a time-dependent geopotential datum

December 4, 2019

Image: National Geodetic Survey

NGS releases beta version of NCAT 2.0

October 2, 2019

Photo: National Geodetic Survey

NGS releases beta coordinates and multi-year CORS solution

April 3, 2019

Sources: Esri, DeLorme, USGS, NPS, NOAA

NGS to perform another Multi-Year CORS Solution

February 6, 2019

Photo: National Geodetic Survey

A look at NGS’ experimental and hybrid geoid models

December 5, 2018