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Structured grids

Dimensions

D depth points, corners of grid cells
Z water level points, cell centres of grid , http://en.wikipedia.org/wiki/Face_(geometry)
UV velocity points, contravariant

Length of dimensions
i number of rows
j number of columns
D = (i+1) * (j+1)
Z = i * j
U = (i+1)j
V = i(j+1)

Unstructured grids

Networks

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