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Title
International cooperation and technology transfer
Author
Mussio, Luigi

360
GEOID MODELLING IN THE SOUTHERN REGION OF THE
BUENOS AIRES PROVINCE
Raúl Perdomo*, Daniel Del Cogliano*
Nilda Di Croche**, Esteban Napal**, Beatriz Aldalur**,
Pablo Napal**, Irene Pintos**
*Fac. de Cs. Astronómicas y Geofísicas UNLP, CONICET, La Plata
**Dto. de Ingeniería UNS, Bahía Blanca
ISPRS Commission VI Working Group 3
Abstract
During the end of 1997 and the beginning of 1998 a GPS network was measured in the South of
Buenos Aires province.
Most of the points of this network coincided with existing points of the Altimetric Network of the
Country.
Geoidal undulations were calculated using the ellipsoidal heights (h) obtained as the result of the
GPS measurements and the orthometric heights (H) which were provided by the Military
Geographic Institute. (N = h - H). The values of these geoidal undulations were compared with
those obtained using the EGM96 global model. The range between the maximum and minimum
differences was few centimeters.
One aim of this work is to test the global geoid model for long and short distances and to detect
critical zones where a densification of the observations is necessary to adjust the geoidal model in
study.
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