NGS 2018 GPS on BMs program in support of NAPGD2022 — Part 5
February 7, 2018
My last column highlighted two components of the North American-Pacific Vertical Datum of 2022 (NAPGD2022) — the geoid undulation […]
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My last column highlighted two components of the North American-Pacific Vertical Datum of 2022 (NAPGD2022) — the geoid undulation […]
My last column focused on the National Geodetic Survey’s (NGS) current plans for estimating North American-Pacific Geopotential Datum […]
My last column highlighted some of the feedback provided by guest presenters at the NGS’ 2017 Geospatial Summit […]
On April 24-25, 2017, the National Geodetic Survey (NGS) hosted the 2017 Geospatial Summit in Silver Spring, Maryland, […]
Impact of January 2016 GPS UTC Anomaly By Charles Curry / Presented at ION ITM, January 2017 On […]
![[FIGURE 1] New Datums: Approximate Orthometric Height Change](https://stage.gpsworld.com/wp-content/uploads/2016/12/Fig1-datum-NGS-ortho-height-change-250x188.jpg)
Understanding the differences between the North American Vertical Datum of 1988 and the new 2022 Vertical Reference Datum […]
At Caltrans District 7 in Los Angeles, we use the onboard GPS capability of smartphones to navigate in real time to the locations of proposed aerial targets and National Geodetic Survey (NGS) control stations.
The world of sharing positional information is filled with scenarios like “I got a cm and you got a cm, but our centimeters differ by a meter.” If our modern positioning systems are so capable, then virtually all positional data integration should be a snap. Unfortunately, that is often just not so. The failure in many cases is a lack of knowledge on the part of many GNSS users of basic principles of geodesy and geodetic surveying guidelines and providing complete metadata.
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