TAG: NGS

Discussing the new North American-Pacific Geopotential Datum of 2022 — Part 1

June 7, 2017By

On April 24-25, 2017, the National Geodetic Survey (NGS) hosted the 2017 Geospatial Summit in Silver Spring, Maryland, to discuss its plans for replacing the North American Datum of 1983 (NAD 83) and the North American Vertical Datum of 1988 (NAVD 88) in 2022. The Summit was a day and a half long and provided an opportunity for NGS to... read more

Surveyors’ coordinate systems for 2022 and beyond

May 3, 2017By

Time. Ask anyone what time means to them, and they will give you a different answer. Benjamin Franklin famously stated that “time is money.” Time for the surveyor can mean being out in the field retracing a boundary, drafting a plat or working with a client to help them see their goals achieved. Just like any other profession, time can... read more

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Analyzing NGS’ GPS on benchmark dataset used to make GEOID12B

October 5, 2016By

These columns have focused on procedures and routines for establishing GNSS-derived orthometric heights. There are many ways to analyze and investigate GNSS data and adjustment results. I have provided some basic concepts that I believe are important for users to understand. The selection of constraints is a very important part of establishing accurate and consistent NAVD 88 GNSS-derived orthometric heights. All... read more

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Highest Peak in North America to be Surveyed

June 16, 2015By

A new GPS survey of Mount McKinley, the highest point in North America, will update the commonly accepted elevation of McKinley’s peak, 20,320 feet. The last survey was completed in 1953. The USGS, along with NOAA’s National Geodetic Survey (NGS) and the University of Alaska Fairbanks (UAF), are supporting a GPS survey of the Mount McKinley apex. Surveying technology and processes... read more

NGS Seeks Geodesist

November 24, 2014By

The National Geodetic Survey is seeking applicants for a geodesist (real-time kinematic network) with the Spatial Reference System Division. Applications are being accepted through December 4. The individual selected for this position will: Serve as subject matter expert and liaison to the Real-Time Kinematic Network (RTN) community. Assist in defining policy and guidance related to RTN for geodetic products and services. Serve as customer service representative... read more

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Seven Free Alternatives to OPUS GPS Post-Processing During U.S. Federal Government Shutdown

October 2, 2013By

On October 1, 2013, the U.S. federal government shut down and furloughed 800,000 non-essential workers. While services considered essential remained active, those considered non-essential services, like the National Geodetic Survey’s Online Positioning User Service (OPUS), were shutdown. OPUS is a free, online GPS post-processing service. If you try to access www.ngs.noaa.gov, the following screen will be displayed: For those of... read more