netcdf_mpas

netcdf_mpas a MATLAB code which reads an MPAS NETCDF grid file.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

netcdf_mpas is available in a C++ version and a MATLAB version.

Related Programs:

cdl, a data directory which contains examples of CDL files, a text version of NETCDF files created by the NCDUMP program;

gfd2, a dataset directory which contains geophysical data, stored in NETCDF format.

mpas_grid_display, a MATLAB code which reads an MPAS NETCDF grid file and displays the primary polygonal mesh or the dual triangular mesh.

netcdf, a data directory which contains examples of NETCDF files, a format for the interchange of scientific data.

netcdf_gis_read, a MATLAB code which reads GIS data stored as a NETCDF file.

netcdf_mpas, a data directory which contains examples of MPAS grid data stored as NETCDF files.

Reference:

1. The MPAS home page, https://mpas-dev.github.io .
2. Russ Rew, Glenn Davis, Steve Emmerson, Harvey Davies, Ed Hartne,
   The NetCDF User's Guide,
   Unidata Program Center, March 2009.
3. Todd Ringler, John Thuburn, Joseph Klemp, William Skamarock,
   A unified approach to energy conservation and potential vorticity dynamics for arbitrarily-structured C-grids,
   Journal of Computational Physics,
   Volume 229, Number 9, 1 May 2010, pages 3065-3090.

Source Code:

• netcdf_mpas_read_cellsonedge.m, reads the cell locations, and the pairs of cells that define the edges of the triangulation.
• netcdf_mpas_read_cellsonvertex.m, reads the cell locations, and the triples of cells that define the triangles of the triangulation.
• netcdf_mpas_read_xyzcell.m, reads the cell locations.
• netcdf_mpas_report.m, reads a NETCDF MPAS grid file and reports its contents.
• timestamp.m, prints the YMDHMS date as a timestamp.

Examples and Tests:

NETCDF_MPAS_TEST calls the tests.

• netcdf_mpas_test.m, calls the tests.
• netcdf_mpas_test01.m, reads the file and prints some information;
• netcdf_mpas_test02.m, extracts information about the number and location of cells.
• cells.png, a PNG image of the cells.
• netcdf_mpas_test03.m, extracts information about the cell locations and the pairs of cells that define each line of the triangulation, allowing us to draw the lines of the triangulation.
• triangulation_lines.png, a PNG image of the lines of the triangulation.
• netcdf_mpas_test04.m, extracts information about the cell locations and the three cells that form each triangle, allowing us to draw the faces of the triangulation.
• triangulation_faces.png, a PNG image of the faces of the triangulation.
• netcdf_mpas_test.txt, the output file.

X1.642.GRID is a dataset of 642 cells used by the example.

• x1.642.grid.nc, an MPAS grid file for a mesh on the sphere, using 642 nodes, 1280 vertices, 1920 edges.
• x1.642.grid.header, a text printout of the header information in the file, created by the command "ncdump -h x1.642.grid.nc > x1.642.grid.header"

You can go up one level to the MATLAB source codes.