Northern Andalusia - Spain
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Authors: M.C. de Lacy, et al.
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Created: 2001
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Resp: M.C. de Lacy
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Description:
This is a gravimetric geoid for the Spanish region of Northern Andalusia. In particular it covers the area with
limits 37.3° < lat. < 38.5°, -4.3° < lon. < -2.3°, and with a grid resolution of 3'x 3'. It is referred to
the GRS80 ellipsoid and it is based on a subset of 1874 free-air anomalies extracted from the database of the Instituto
Geografico Nacional (Spain). The gravimetric geoid was computed by the fast collocation technique in the framework of a
remove-restore procedure. The used global geopotential model was OSU91A up to degree and order 360. The digital terrain model
with a grid spacing of 100 m x 100 m was provided by the Servicio Geografico del Ejercito (Spain). The resulting gravimetric
model was assessed by comparing it with GPS/levelling data at benchmarks belonging to the Spanish first-order levelling network.
After removing a plane from the discrepancies, their standard deviation amounts to 5 cm.
References:
M.C. de Lacy, G. Rodriguez-Caderot, E. Marin, A. Ruíz, M.J. Borque, A.J. Gil, L. Biagi (2001). A gravimetric geoid
computation and comparison with GPS results in Northern Andalusia (Spain). Studia Geophysica et Geodaetica, 45(1),
pp. 55-66. DOI: 10.1023/A:1021702514130
Web of Science ID:
DRCI:DATA2018029012462774
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