id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
879	IMPORTANT: Added several Matlab scripts to manipulate grids	arango		"I have several Matlab grid manipulation scripts that may be useful to some Users.

* '''cartesian_grid.m:''' Given a larger donor grid ('''D'''), this function extracts a rotated Cartesian grid centered at ('''Xc''', '''Yc''') and rotated by angle '''theta'''. The larger donor grid is used during plotting to display the location of the rotated grid.

* '''spherical_grid.m:''' Given a larger donor grid ('''D'''), this function extracts a rotated Spherical grid centered at ('''Tlon''', '''Tlat''') and rotated by angle '''alpha'''.

* '''grid_rotated.m:''' Given a larger Grid NetCDF file ('''Ginp'''), this function extracts and creates a rotated subdomain (Cartesian or Spherical) Grid NetCDF file ('''Gout''') centered at ('''Xmid''','''Ymid''') and rotated by angle '''theta'''.

* '''roms_metrics.m:''' Computes the several ROMS grid metrics from the ('''lon''','''lat''') coordinates.

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I highly recommend using '''roms_metrics''' when building the ROMS '''GRID''' NetCDF file to have consistent grid variables. The function '''grid_metrics''' is deprecated. Use the robust '''roms_metrics''' instead.  The '''grid_metrics''' function will be removed in the future.

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Notice that the rotated grids are experimental.  They were designed to have rotated nested grids. Such capability is not available in the ROMS numerical kernel. "	upgrade	closed	major	Matlab Processing Scripts	Matlab	3.9	Done