Geodetic Control

Euler Poles and Hinge Lines: How Plate Tectonics and Isostatic Adjustment Affect Geographic Coordinates

May 28, 2021

More details on the National Geodetic Survey’s models of crustal motion for the new National Spatial Reference System.

Update on National Spatial Reference System Modernization Plans

May 17, 2021

The National Geodetic Survey has updated its plans and schedule for modernization of the National Spatial Reference System.

Participate in GPS on Benchmarks Program

November 24, 2020

The National Geodetic Survey is asking surveyors to collect GPS observations to improve the accuracy of the new National Spatial Reference System.

David Vogel to serve as liaison to surveying and geodetic communities

April 15, 2020

With Brenda Hemstead’s retirement, David Vogel will become the SCO’s liaison to Wisconsin’s surveying and geodetic communities.

Professor Alan Vonderohe’s book on the new 2022 datums is now available

May 13, 2019

In 2022 the National Geodetic Survey (NGS) will replace NAD 83 and NAVD 88 with new horizontal and vertical reference systems known as the North American Terrestrial Reference Frame of 2022 (NATRF2022) and the North …

Geodetic Control Point Data

July 13, 2017

Geodetic control refers to permanent reference markers placed in the ground and precisely marked, located and documented. These markers provide accurate reference points to support the production of consistent and compatible data collection for surveying and mapping projects. Wisconsin has tens of thousands of survey control monuments placed by numerous agencies over many decades, so the avenues for finding control point information are varied.