Grid Generation

Grid Generation

ROMS uses an Arakawa "C" Grid. The grid can be specified using analytical functions or with a netcdf file. To create a netcdf grid file, there are several grid generation tools.

SEAGRID

A GUI-based Matlab program for creating curvilinear orthogonal grids with 4 corners

http://woodshole.er.usgs.gov/operations/modeling/seagrid/seagrid.html

SEAGRID includes tools to create ROMS NetCDF grid files.

Some useful additional m-files for working with SEAGRID are

• join_cst.m: Turn coastline segments (e.g. from the Coastline Extractor) into coastline polygons that will then mask land when used in SEAGRID.
• read_srtm30plus.m: Read SRTM30+ worldwide 30sec (~1km) topography via Web Mapping Service.

These tools are part of the RPSstuff Matlab toolbox available via SVN:

 svn co https://svn1.hosted-projects.com/cmgsoft/m_cmg/trunk/RPSstuff  ./rps_stuff 

GRIDGEN by Pavel Sakov

A C program for creating curvilinear orthogonal grids with an arbitrary number of corners

http://www.marine.csiro.au/~sakov/ (scroll down Pavel's page to the section on "orthogonal grid generation")