Neb Map Service
era:
sün
=ig. 6: German research chmın
orocessed bathymetry in the Black See
v(MARUM ancı e. (
Jr
1b,
nNerge all data sets covering this area provided by
“he data providers.
The German marine geoscience research com-
Munity acquired numerous hydroacoustic data
within the European seas. Raw data sets are be
ng archived by the BSH (www.bsh.de/EN/DATA,
Iceanographic_Data_Center/Surveying_data/
surveying_data_node.html). Within the EMOD
1et Bathymetry project the University of Bremen
and MARUM have processed (full hydrographic
oarocessing including tidal, sound velocity cor
‚ection, manual soundings editing and draft cor-
‚ections), prepared metadata and sampled some
af these data sets. More specifically, benefiting
‘rom two decades of strong interest in the Black
ea region, MARUM has shared their processed
oathymetric data for the area (14 out of 16 survey
zruises, see Fig. 6). Moreover, German bathymetric
zontribution has generated a number of scien-
tific peer-reviewed papers such as Gutscher et al.
2017) in the lonian Sea (Fig..Z) Loher et al. (2018)
or the Calabrian Arc or the Gibraltar/Alboran Sea
Wienbera et al. 2013). The German research com
000
‚500
2a. ; : High-resolution bathvmetry contribution af the German research commMmUNÄIN
N the lonian Sea
munity has also been largely contributing to the
Arctic area as part of a tight collaboration between
EMODnet Bathymetry and the IBCAO community
(Jakobsson et al. 2020).
Contribution to global bathymetric
grids and regional programmes
As outlined above, since early years of the EMOD
net Bathymetry programme, collaboration has
aeen key factor for its development and success.
Beyond the strong internal collaboration between
contributors of the EMODnet consortium, as de-
scribed earlier, EMODnet Bathymetry has also
elaborated strong relations with several interna-
tional actors.
The EMODnet DTM along with the description
of the source bathymetric data enable contribut-
ng partners to fulfil their obligations against the
NSPIRE Directive. Moreover, because the EMOD-
ı1et DTM extends over national borders and that
netadata are uniformly describing the data sourc
es in a unique portal, user groups of similar inter-
est have been selecting the EMODnet products as
their main source of information. For example, both
the North Sea Hydrographic Commission and the
3altic Sea Hydrographic Commission are using the
aathymetric information originating from EMOD-
1et as part of their Marine Spatial Data Infrastruc
‚ure, This is also the case for the Baltic Environmen
)rotection Commission (Jakobsson et al. 2019).
zMODnet Bathymetry also shares mutual com
olementary benefits with the International Hy-
drographic Organization (IHO) as a number of
:MODnet contributors are themselves Hydro-
graphic Offices and as the IHO sees the EMODnet
3Zathymetry products (DTM and data Inventory)
as an authoritative best estimate, trans-nationa!
digital bathymetric grid vital to the development
of economic, scientihc and environmental activi-
ties. This collaboration is embodied as part of the
Memorandum of Understanding signed betweer
the IHO and the European Commission in 2012. It is
naterialised through the full integration of the CDI/
CPRD metadata inventory services in the IHO DCDB
(Data Centre for Digital Bathymetry) viewer (https:/
Naps.ngdc.noaa.gov/viewers/iho_dcdb) through
OGC services, giving the possibility for any user to
‚etrieve metadata information from European data
1olders and to be redirected to the EMODnet Ba-
thymetry portal for further exploration.
Additionally, GEBCO and EMODnet communities
Nutually integrate their bathymetric grids (respec
üvely at 115 and approximately 500 m horizonta
esolution). Fig. 8 shows the geographical distri-
aution of measured data sources composing the
'ecent 2019 GEBCO release. Note that darker areas
ndicate regions without direct measurement. In
these areas, the bathymetry is predicted from sat
ellite altimetry (Smith and Sandwell 1994). One can
see in Fig. 8 that the European seas have largely
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