Grid families
Topologies and metric structure of the seven grid families ESD targets.
The seven seeded grid families. Each page describes the family’s topology,
coordinate system, and metric tensor, with a visualization of a typical
configuration generated from the canonical fixtures under
discretizations/grids/<family>/.
- Arakawa staggered grid
arakawa
grid
Staggered grid wrapping a base curvilinear grid — A / B / C / D variants — with per-stagger location keys.
- Cartesian
cartesian
grid
Logically rectangular Cartesian mesh with optional non-uniform spacing per axis (1D / 2D / 3D).
- Cubed-sphere
cubed_sphere
grid
Six gnomonic panels covering the sphere; in-panel curvilinear (ξ, η) coordinates with cross-panel ghost stitching.
- Duo (geodesic triangular)
duo
grid
Geodesic triangular mesh on the sphere; recursively subdivided icosahedron.
- Lat-Lon
latlon
grid
Regular spherical lat-lon mesh with metric corrections for the spherical surface.
- MPAS
mpas
grid
Quasi-uniform Voronoi mesh on the sphere with icosahedral dual (12 pentagons + hexagons).
- Vertical
vertical
grid
1D vertical column with arbitrary level spacing — pressure / sigma / hybrid coordinates.