HVIEW2D - hatching representation
From BAWiki
Isosurfaces of a quantity are displayed using different types of hachures which are dependent on the value of the data. The hachures are made out of superpositions of bundles of parallel lines which are either horizontally, vertically or diagonally oriented. For vector quantities the hatching is representing the data value and the orientation of the vector is indicated using a superimposed vector arrow of constant length.
The following demo examples are currently available for this type of graphical data representation:
slack water time of flood current
tidal volume
maximum ebb current velocity
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