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Introduction
The use of bathymetry is a very central element when working with the determination of the extension of the continental shelf according to UNCLOS Article 76. It is relevant both for the depth constraint (2500m depth +100M) and the determination of the foot of the continental slope. In Geocap, bathymetry can have several different forms:
- Singlebeam bathymetry may be imported as bathymetric profiles.
- Multibeam bathymetry or other spread point data with depth measurements can also be imported. In order to use the foot of slope analysis tool on point data, the dataset must be gridded first.
- Grids may be imported directly into Geocap. Geocap supports import of several different file formats; the most common and useful kind of bathymetric data is the ETOPO1 grid. The ETOPO1 Grid is provided by NGDC (National Geophysical Data Center). This grid will not be accepted by the Commission as a basis for your foot of slope points. However once you have imported the grid you will be able to see the shape of the sea floor, and in particular the approximate position of the Foot of Slope or base of slope region.
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Exercises
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Download the ETOPO1 grid from the Internet
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