of the materials that make the seafloor by efficiently
integrating thousands of individual datasets. The goal is to bring
seabed information - and today's information - from marine geology,
into one seabed mapping that can fulfil the community needs for
information on many spatial scales. The system deals with
composition, acoustic properties, colour, geology and biology.
Many software tools can work on
integrated data: Geographic Information Systems
(GIS), Relational Databases
(RDB), modeling, visualisation, and stratigraphic .
entry efficiencies come from programs that prepare the data
in standard databases. As
of its efficiency, the US, Australian and global coverages together
hold integrated data for over 3,000 datasets and 5 million
described seafloor sites. The system is
vendor-independent and code is shared, so the system will be a legacy
into the future.
scale of operation is local, national and global: shorelines,
seaways, national EEZ's, ocean basins, and worldwide. The
database deals with coastal, estuarine, inshore,
continental shelf, continental slope and very deep sea environments.
Point-data based, so spatial
resolution improves as more datasets
Gridded and vector mappings of the seafloor materials are computed from
the point-data coverages. Accuracies are the same as for the original
data; system precision is 1m; datum is WGS84.
dbSEABED is operated
a number of cooperating institutions, who import, integrate,
and display regional datasets under a common format and software setup.
They share data, code and innovations. Some organizations use dbSEABED
on their secure premises where they add their own specialized datasets
group data holdings.
is achieved by checks on data at data entry, by error-trapping in
the data-processing software, and by working the data intensively in
collaborative research programs. dbSEABED was devised to be robust in
inexact and incomplete information environment - marine geosciences. An
uncertainty budget is calculated with map outputs.
and data handling tools are available to collaborating
in 3D renditions, stratigraphic synthesis, statistics, databasing, GIS
tools, uncertainty analysis.
of seafloor type dominances for the NW European Shelf (North Sea)
region. This regional
coverage is being developed to help with numerical modeling of tides. It holds over 60,000 sites all from public data sources. The
detailed gridded data is available on request.
dbSEABED display of integrated data from different 23 datasets for the Tasmanian region (Australia),
providing rock reef occurrences and interpolated values for seafloor
gravel. Temperate reefs are locations of extraordinary biodiversity and
also important commercial fishery resources. Because most
areas are close to coastline special methods for dealing with coastal
complexity and diverse data sources (from science and the community at
large) are needed. The interpolation does not map where uncertainties
are too large - long distances to data, or too great changes in water