2026-04-05T13:29:48Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:69852021-04-21T10:57:31ZDOIDBDOIDB.ISG

false4DOIDB.ISG 10.5880/isg.2004.001 Avalos Naranjo, David David Avalos Naranjo 0000-0003-4468-9092 Instituto Nacional de Estadística y Geografía (INEGI), Aguascalientes, Mexico Hernández Navarro, Antonio Antonio Hernández Navarro Instituto Nacional de Estadística y Geografía (INEGI), Aguascalientes, Mexico Muñoz Abundes, Raúl Raúl Muñoz Abundes Instituto Nacional de Estadística y Geografía (INEGI), Aguascalientes, Mexico Sosa Gaytán, Manuel Manuel Sosa Gaytán Instituto Nacional de Estadística y Geografía (INEGI), Aguascalientes, Mexico GFZ Data Services 2004 Geodesy Geoid model ISG Stokes-Helmert technique Mexico EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY Reguzzoni, Mirko Mirko Reguzzoni 0000-0002-4027-9347 International Service for the Geoid (ISG), Politecnico di Milano, Italy Carrion, Daniela Daniela Carrion 0000-0003-1262-9394 International Service for the Geoid (ISG), Politecnico di Milano, Italy Rossi, Lorenzo Lorenzo Rossi 0000-0001-6050-1972 International Service for the Geoid (ISG), Politecnico di Milano, Italy Avalos Naranjo, David Instituto Nacional de Estadística y Geografía (INEGI), Aguascalientes, Mexico ISG Staff International Service for the Geoid (ISG) 2004 Dataset https://comisiones.ipgh.org/CARTOGRAFIA/RCA078-079.html https://www.isgeoid.polimi.it/Geoid/America/Mexico/INEGI-2005%20El%20Geoide%20en%20Mexico.pdf http://www.isgeoid.polimi.it/Geoid/format_specs.html 10.1007/s00190-020-01434-z http://www.isgeoid.polimi.it/ 10.5880/isg.200510.001 10.5880/isg.2006.001 10.5880/isg.2005.001 1.0 CC BY 4.0 GGM04 is the first gravimetric geoid model for Mexico computed by INEGI on 2004 (GGM stands for Geoide Gravimetrico Mexicano). The main input of terrestrial gravity data included 100,000 points inside Mexico and nearly 400,000 more over neighboring countries, all unfiltered. The source for this dataset was INEGI, PEMEX and US-DMA. Marine gravity was derived from Topex/Poseidon altimetry. The used digital terrain models were Mexico-CEM1, US-NED and SRTM. A reference satellite geoid model was also used up to degree and order 40 from the geopotential model GRIM4-S4. The computation methodology was based on the Stokes-Helmert technique with the software provided by the University of New Brunswick (UNB, Canada). The resulting GGM04 model is referred to the GRS80 reference ellipsoid in the ITRF92 frame (epoch 1988.0). The error RMS of geoidal heights is 58 cm, estimated from 1377 GPS/leveling data.

The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
The International Service for the Geoid (ISG) was founded in 1992 (as International Geoid Service - IGeS) and it is now an official service of the International Association of Geodesy (IAG), under the umbrella of the International Gravity Field Service (IGFS). The main activities of ISG consist in collecting, analysing and redistributing local and regional geoid models, as well as organizing international schools on the geoid determination.
Gravimetric geoid model GGM04 -118.979 -86.0208 14.0208 32.9792