Rigorous geodetic point positioning in Mexico
Hernandes-Navarro, Antonio and Tomas Soler
Thanks to the scientific cooperation between the General Direction of Geography of the Mexican Instituto Nacional de Estaddstica, Geograffa e Informmtica (INEGI) and the National Geodetic Survey (NGS) of the U.S., is now feasible to accurately position points located within the Mexican territory using GPS observations and the access, through Internet, to NGSS OPUS (On-line Positioning User Service). This service, free of charge, determines with minimum delay, the final coordinates referred to the new -in process of official adoption- Mexican datum, specifically, ITRF 2000, epoch 2004.0. Therefore, OPUS could be used in Mexico for geodetic, topographic, cartographic, GIS, and cadastral work, obtaining always consistent results with the reference frame that defines the Mexican geocentric datum the basis for all cartographic work in the country. Important to this new development is the role of the GPS stations belonging to the Mexican Red Geoddsica Nacional Activa (RGNA) whose data take part in the OPUS process to achieve the best positioning results in the Mexican Republic. Most of the information presented here was published in the trade journal The American Surveyor.
Event: XXIII International FIG Congress : Shaping the change
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