Periodic Mesh Support#
We currently make the simplifying assumption that spherical meshes are a
special instance of periodic meshes, which are periodic across the antimeridian.
We support both planar periodic and map projected spherical meshes, using the
same methods, by assuming that the period (in the x and y directions
respectively) is constant. This assumption is valid for planar periodic meshes
and for some map projections, but falls apart for certain map projection where
the antimeridian does not follow a strait line. Therefore we only support a
subset of cartopy projections, which are listed below. Future work will
develop a more elaborate method of dealing with spherical mesh periodicity,
which in turn will expand the list supported map projections.
For patches that cross a periodic boundary we simply correct the coordinates to remove the periodicity, which enables plotting. Future work will mirror the patches across the periodic boundary, so as to more accurately demonstrate the periodic nature of the mesh.
Supported Map Projections for Spherical Meshes#
Currently, the only support map projection are:
It is important to note that planer (non-periodic) meshes are not limited to
this list of map projections and can choose from the full list of cartopy
projections.