GPS High Accuracy Geodetic Networks in Mexico
Publication: Journal of Surveying Engineering
Volume 122, Issue 2
Abstract
Recently, Mexico's Instituto Nacional de Estadística, Geografía e Informática (INEGI) adopted a geocentric three-dimensional coordinate system as the basis for all its national geodetic and mapping needs. The selected frame is the International Earth Rotation Service (IERS) Terrestrial Reference Frame of year 1992 (ITRF92), epoch 1988.0. The geometric surface of choice is the ellipsoid of the Geodetic Reference System of 1980 (GRS80). The implementation of this geocentric datum permits the integration of all geodesy, engineering surveys, mapping, and land information systems of Mexico into a modern framework consistent with present accuracies obtainable through the global positioning system (GPS). The practical realization of the spatial reference system was done in cooperation with the National Oceanic and Atmospheric Administration's (NOAA) National Geodetic Survey (NGS) through a series of coordinated GPS projects. As a result, Mexico established 14 permanent GPS trackers (A-order stations) from which the less accurate B-order GPS network was propagated. With this implementation, INEGI assures that the requirements of modern geodetic and cartographic operations in Mexico will be met for many years to come. Updated results, procedures, and data analysis are presented here.
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Published In
Journal of Surveying Engineering
Volume 122 • Issue 2 • May 1996
Pages: 80 - 94
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: May 1, 1996
Published in print: May 1996
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