Uruguay (IGM110)
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Author: W.H. Subiza Piña, et al.
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Created: 2023
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Resp: W.H. Subiza Piña
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Description:
The official Uruguayan geoid model, called IGM110, was calculated by the Military Geographic Institute (IGM) in 2023 and consists of a grid of 1´ x 1´ geoidal undulations with a total of 151,981 points. The extent is from 29.5° S to 35.5° S in latitude, and 52.5° W to 59.5° W in longitude, covering parts of Argentina and Brazil. The geodetic reference system is SIRGAS ROU-98 (the reference ellipsoid is GRS80). IGM110 was computed by adapting the UruGeoide110 gravimetric model by a bias and a tilt to the national vertical system, Cabildo 1948. This was performed by fitting GNSS/levelling observations, with a mean of 1 cm and a standard deviation of 7 cm. The IGM110 model with some applications is available at the IGM webpage.
Model Citations:
W.H. Subiza Piña (2023). The Uruguayan hybrid geoid: IGM110. V. 1.0. GFZ Data Services. DOI: 10.5880/isg.2023.003
Reference:
Servicio Geografico Militar (2023). UruGeoide110. Report of Servicio Geografico Militar, Montevideo, Uruguay.
Digital object identifier:
DOI: 10.5880/isg.2023.003 (geoid in ISG format)
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