by R. J. LeVeque

Figure 1:

**
Caption:
**
Quadrilateral grids on the circle and the sphere. In each case the
computational domain is a rectangular grid.

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m-files:
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- circlegrid.m ... mapc2p.m
- spheregrid.m ... mapc2m.m

**
Movies illustrating the mappings:
**

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For more information:
**

These mappings and related mappings are discussed further in the paper
Logically Rectangular Grids and Finite Volume Methods for
PDEs in Circular and Spherical Domains
by Donna A. Calhoun, Christiane Helzel, and Randall J. LeVeque
(In preparation)

**Advection on the sphere:**