Description:
ITALGEO95 is a gravimetric quasi-geoid
for the Italian territory computed at
Politecnico di Milano. The area covered
is 36° < lat < 47°, 6° <
lon < 19° with grid spacing of 3'
both in latitude and in longitude. The
Italian gravity database already used
for the previous releases of ITALGEO
has been augmented with the
digitalized Morelli's gravity maps
over Adriatic and Tyrrhenian Seas, and
with the BGI gravity anomalies on land
areas on the northern Italian border
plus data covering the Corsica island.
The reference global model and DTM
have been also updated with respect to
ITAGEO90. In particular the
remove-restore procedure is based on
the OSU91A global gravity model and on
a unique DTM obtained by merging
several national DTMs, Morelli's
bathymetry and the ETOPO5U global
model. Differently from ITALGEO90,
which was based on local collocation
over several overlapping areas, the
computation of ITALGEO95 is based on
fast collocation, leading to a
solution in one step only over the
whole area. The precision is about 10-5
ppm.
References:
R. Barzaghi, M.A. Brovelli, A. Manzino,
D. Sguerso, G. Sona (1996). The new
Italian quasi-geoid ITALGEO95.
Bollettino di Geodesia e Scienze Affini,
55(1), 57-72.
Web of Science ID:
DRCI:DATA2019017015400520
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