The bathymetry is defined by specifying a number of elevation features, either by tracing them on the screen or loading them from a file. Any combination of the following features can be used to define the bathymetry:
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Outlines This element is used to define the boundary(s) of the project area. Usually there will be only one outline, but it is possible to define more than one to create several 'islands' of bathymetry |
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Contour Lines Contour lines (or isolines) are used to define lines on the bathymetry with a fixed elevation |
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Point Levels Point levels are used to define the levels for individual points in the bathymetry area |
The properties of each feature vary depending on the feature type, but they all have a 'Tag' which can optionally be set. This is an identifier for the feature (akin to the feature's name), and it is used to help the user identify particular features.