2026-04-04T09:01:01Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:86012025-12-17T09:37:15ZDOIDBDOIDB.ISG

false4DOIDB.ISG 10.5880/isg.2018.004 Castro Junior, Carlos Alberto Corrêa Carlos Alberto Corrêa Castro Junior 0000-0003-0276-8673 Universidade Federal de Goiás, Goiânia, Brazil Guimarães, Gabriel do Nascimento Gabriel do Nascimento Guimarães 0000-0003-4380-4650 Faculdade de Engenharia Civil, Universidade Federal de Uberlândia (UFU), Uberlândia, Brazil Ferreira, Nilson Clementino Nilson Clementino Ferreira 0000-0003-3419-6438 Universidade Federal de Goiás, Goiânia, Brazil GFZ Data Services 2018 Geodesy Geoid model ISG Stokes-Helmert approach Goiás State Brazil 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 Guimarães, Gabriel do Nascimento Instituto de Geografia, Universidade Federal de Uberlândia (UFU), Uberlândia, Brazil ISG Staff International Service for the Geoid (ISG) 2018 Dataset 10.11137/2018_3_460_469 10.1016/j.jog.2006.09.019 10.5194/essd-13-1653-2021 https://www.isgeoid.polimi.it/ 1.0 CC BY 4.0 The gravimetric geoid model for the State of Goiás covers the longitude range of -43° to -56° and the latitude range of -10° to -22°, with a resolution of 5 arc minutes. A total of 32,446 gravimetric stations were utilized for the geoid modeling. The computation was performed by the Stokes-Helmert approach through the SHGEO software package developed at the University of New Brunswick. In particular, the modified Stokes integral was applied by means of the Fast Fourier Transform. Spectral decomposition was used with the long-wavelength component represented by the EIGEN-6C4 model, up to a degree and order 250. The SAM3s_v2 digital terrain model was used too. The resulting model was assessed by comparing it with 140 GNSS/leveling stations, showing differences with a standard deviation of approximately 10 cm.

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 (Reguzzoni et al., 2021).
Gravimetric geoid model: MODGEO-GO-2018 -56 -43 -22 -10