Eric Colburn, PLS

Category: OPUS

  • Federal Government Shutdown Shutters NOAA NGS OPUS Website

    If you use the Federal Government OPUS website operated by NGS and NOAA, then you may already have discovered that the site is non-functional and have already seen the notice in the image shown here. If you needed OPUS for your land surveying work, but did not realize that the OPUS website has been shuttered,…

  • GEOID12 Error Analysis Complete and GEOID12A Model Developed

    GEOID12 Error Analysis Complete and GEOID12A Model Developed

    Here’s an important notice from The National Geodetic Survey (NGS) concerning the new GEOID12 model: The National Geodetic Survey has determined that the GEOID12 model was developed using erroneous input control points, primarily in the Gulf Coast region. NGS immediately corrected these errors and developed a replacement model: GEOID12A. GEOID12A is now available for public…

  • The National Geodetic Survey Improves the National Spatial Reference System with Simultaneous Major Product Releases

    The National Geodetic Survey Improves the National Spatial Reference System with Simultaneous Major Product Releases

    The National Geodetic Survey Improves the National Spatial Reference System with Simultaneous Major Product Releases In the first week of July, NOAA’s National Geodetic Survey (NGS) released the results of three major improvements to the National Spatial Reference System (NSRS). The NSRS is the consistent coordinate system that defines latitude, longitude, height, scale, gravity, and…

  • NGS Releases New Geoid Model to Serve Surveying, Engineering, and Scientific Communities

    NGS Releases New Geoid Model to Serve Surveying, Engineering, and Scientific Communities

    NGS Releases New Geoid Model to Serve Surveying, Engineering, and Scientific Communities In the last week, the National Geodetic Survey has released a new height transformation model for surveyors, engineers, and the scientific community involved in water flow and the determination of heights with respect to mean sea level. The new “GEOID12” model, implemented in…

  • National Geodetic Survey (NGS) New CORS Coordinates and Absolute Antenna Calibration Pages

    National Geodetic Survey (NGS) New CORS Coordinates and Absolute Antenna Calibration Pages

    National Geodetic Survey (NGS) Releases New CORS Coordinates and Absolute Antenna Calibration Pages NAD83(2011,MA11,PA11) epoch 2010.00 Coordinates On September 6, 2011, NGS updated the National Spatial Reference System NAD 83 (CORS96, MARP00, PACP00) positions and velocities for all CORS sites, to NAD 83 (2011, MA11, PA11). The NAD 83 (2011) frame, which is relative to the…

  • OPUS-Projects Manager Training

    PUS-Projects Manager Training July 11-12, 2011 NGS is currently beta-testing a Network Processing Option for OPUS known as OPUS-Projects. This feature will allow the processing, adjustment and publishing of multiple stations over multiple days. Because of the increased complexity of this capability, the creation and management of Projects for OPUS is limited to those who have…

  • OPUS Soon To Have A New Look

    Yesterday, I was using the National Geodetic Survey’s (NGS) Online Positioning User Service (OPUS), where there was a bright green notice at the top of the OPUS page that said, “OPUS will feature a new look-and-feel on or about 03/01/2011”. In researching this impending change to the look of OPUS, I found the following notice on…