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RISEvolution of NAD 83 in the United States: Journey from 2D toward 4D
Publisher: American Society of Civil Engineers
Abstract: In 1986, Canada, Greenland, and the United States adopted the North American Datum of 1983 (NAD 83) to replace the North American Datum of 1927 as their official spatial reference system for geometric positioning. The rigor ...
Transforming Positions and Velocities between the International Terrestrial Reference Frame of 2000 and North American Datum of 1983
Publisher: American Society of Civil Engineers
Abstract: In December 2001, Natural Resources Canada and the U.S. National Geodetic Survey (NGS) jointly adopted values for a set of 14 parameters for transforming positional coordinates and velocities between the International ...
Continuously Operating Reference Station (CORS): History, Applications, and Future Enhancements
Publisher: American Society of Civil Engineers
Abstract: The National Oceanic and Atmospheric Administration’s National Geodetic Survey (NGS) manages the National Continuously Operating Reference Station (CORS) system that comprises a network of over 1,350 sites, each containing ...
HTDP 3.0: Software for Coping with the Coordinate Changes Associated with Crustal Motion
Publisher: American Society of Civil Engineers
Abstract: NOAA’s National Geodetic Survey has developed the horizontal time-dependent positioning (HTDP) software to provide a way for its users to estimate the coordinate changes associated with horizontal crustal motion in the ...
Geometric Combination of Multiple Terrestrial Network Solutions
Publisher: American Society of Civil Engineers
Abstract: Terrestrial network solutions prepared by different institutes and/or at different epochs imply different reference frame definitions, since various reference stations and processing strategies may be involved. A combination ...
Expanding TRANS4D’s Scope to Include 3D Crustal Velocity Estimates for a Neighborhood of the Caribbean Plate
Publisher: ASCE
Abstract: This paper introduces Version 0.3 of the TRANS4D software, where TRANS4D is short for Transformations in Four Dimensions. TRANS4D enables geospatial professionals and others to transform three-dimensional (3D) positional ...