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The Bathymetry of the Central Mediterranean Sea in the framework of
the EMODnet projecta case study of bathymetric data
integration and processing.
Federica Foglini & Marzia RovereCNR-ISMAR – Institute of Marine Science
GEBCO Science Day 2011 – La Jolla 4th October 2011.
OUTLINE•Introduction – Overview of CNR-ISMAR Database
•Bathymetric data collection and processing
•The Bathymetry of the Adriatic sea – single beam and multi beam data integration case study
•ISMAR in EMODnet - DTM production and GEBCO data integration
•EMODnet products in the Central Mediterranean sea
•WHY BATHYMETRY? - some examples of application in Oceanography, Geology and Geohazard assessment, habitat
mapping
•Conclusions
CNR-ISMAR Database
From 1991 to 2011 ISMAR collected
about 113.500 km of seismic profile and bathymetric
data on board R/V STRAKHOV
URANIA
CNR-ISMAR Database
•SB Atlas Deso25•Reson 8160 (50
kHz)•Konsberg EM300
(30 kHz)•Kongsberg
EM710 (70–100 kHz)
•Konsberg EM3000 (300 kHz)
• Konsberg EM3002 (293 kHz, 300 kHz,
307 kHz)• Reson 8125 (455
kHz)•Geoswath Plus
(500 kHz)
CNR-ISMAR Database
•EUROSTRATAFORM(European Strata Margin
formation)
•HERMIONE (Hotspot Ecosystem Research and
Man's Impact On European Seas)
•HERMES Hot Spot Ecosystem Research on the Margins of European
Seas
•CARTOGRAPHY OF ITALIAN SEAS
•MAGIC (MArine Geohazards along the
Italian Coasts)
•MAGIC ProjectAn integrated research project for acquiring high-resolution morphobathymetry and producing geohazard maps of the
continental margins of Italy
CNR-ISMAR DATA COLLECTION
60m
GeoSwath 500 kHz
DTM 0.5m
CNR-ISMAR DATA COLLECTION
DTM RESOLUTION
5M
EM3000
CNR-ISMAR DATA COLLECTION
DTM RESOLUTION
20 m
RESON 8160
CNR-ISMAR DATA COLLECTION
DTM RESOLUTION
20 m
TWIN SLIDES
CNR-ISMAR DATA COLLECTION
DTM RESOLUTION
50M
EM1220 Km
N
CNR-ISMAR DATA COLLECTION
N
4 kM
DTM RESOLUTION25 m
EM3002D (10-150m)EM710 (150-500)
EM 12 (>500)
DATA PROCESSING – Features Detection
DATA INTERPRETION AND ACCURATE MANUAL
CLEANING
DATA ANALYSIS AND ERROR DETECTION
ADRIATIC SEA - SB and MB DATA INTEGRATION
Single Beam echo soundings
SB interpretation and processing
Variable density XYZ soundings
Multi Beam swath bathymetry
Multi beam Data Processing for single surveys
High density xyz soundings
Import SB and MB Soundings
Variable resolution Tuning filters
Variable Epsilon model (TIN)
Export final uniform GRID
600,000550,000500,000450,000400,000350,000300,000250,000200,000150,000100,00050,0000
-50
-100
-150
-200
-250
-300
-350
-400
-450
-500
-550
-600
-650
-700
-750
-800
-850
-900
-950
-1,000
-1,050
-1,100
-1,150
Venice
Pescara
Bari
THE ADRIATIC SEA -SB and MB DATA INTEGRATION
Variable resolution Tuning filters
Variable Epsilon model (TIN)
DTM 200m
THE ADRIATIC SEA -SB and MB DATA INTEGRATION
THE ADRIATIC SEA - SB and MB DATA INTEGRATION
Import SB and MB Soundings
Export final uniform GRID
Variable resolution Tuning filters
Variable Epsilon model (TIN)
EMODnet - Central Mediterranean seaDTM Regional Coordinator
EMODnet DTM procedure of production
.XYZprecessedsoundings
from different sources
Smoothing
Final DTM
1/4 arc-minute DTM
Gebco 30 arc-second integration
1/16 arc-minute DTM
CDI production
Depth is calculated for
each elementary
polygons where soundings
exists
1/16 DTM7 values
EMODnet - Central Mediterranean sea
FINAL DTM 10 values
1.Depth MIN2.Depth MAX
3.Depth Average4.Depth STD
5.Interpolation6.Elementary
surface7.Depth smoothed8.Depth smoothed
offset9.CDI ID
10.DTM SOURCE
EMODnet - Central Mediterranean sea
EMODnet - Central Mediterranean sea
WHY BATHYMETRY??
•Oceanography
•Geology and Geohazard assessment
•Habitat mapping
SOME EXAMPLESBy
Marzia Rovere
BACKSCATTER
MATTE POSIDONIA
SAND POSIDONIA
MAERL
SCATTERED GRASSLAND ON SAND
CORALLIGENOUSBIONOMICS CHART
SAND
8 km
Posada braided river
underwater shelf
edge delta22 km
10 km
4 km
4 km
5 km
Near shore canyons: Niceto Canyon oil refinery plant in Milazzo
Near shore canyons: Gioiosa Marea Touristic place
CONCLUSIONS
CNR-ISMAR collected huge amount of bathymetric data in the Central Mediterranean Sea in the framework on National and
European projects.
Bathymetric data processing and merging is one of the main challenge because of different data sources, systems, resolution
and water depth
CNR-ISMAR is able to make the bathymetric data available to the global community in the framework of EMODnet, following
EMODnet QA/QC Standard
Bathymetry is fundamental for many scientific issues and applications from oceanography to geology
