seagrid2scrum.m

一些制作正交曲线网格的matlab源程序

name(nc{'spherical'}.option_F_, 'option(F)')
 
nc{'f0'} = ncdouble; %% 1 element.
nc{'f0'}.long_name = ncchar('Coriolis parameter central value on a beta-plane');
%	nc{'f0'}.FillValue_ = ncdouble(0);
 
nc{'dfdy'} = ncdouble; %% 1 element.
nc{'dfdy'}.long_name = ncchar('Coriolis parameter gradient on a beta-plane');
%	nc{'dfdy'}.FillValue_ = ncdouble(0);
 
nc{'hraw'} = ncdouble('bath', 'eta_rho', 'xi_rho'); %% 0 elements.
nc{'hraw'}.long_name = ncchar('Working bathymetry at RHO-points');
nc{'hraw'}.units = ncchar('meter');
nc{'hraw'}.field = ncchar('bath, scalar');
 
nc{'h'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'h'}.long_name = ncchar('Final bathymetry at RHO-points');
nc{'h'}.units = ncchar('meter');
nc{'h'}.field = ncchar('bath, scalar');
 
nc{'f'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'f'}.long_name = ncchar('Coriolis parameter at RHO-points');
nc{'f'}.units = ncchar('second-1');
nc{'f'}.field = ncchar('Coriolis, scalar');
 
nc{'pm'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'pm'}.long_name = ncchar('curvilinear coordinate metric in XI');
nc{'pm'}.units = ncchar('meter-1');
nc{'pm'}.field = ncchar('pm, scalar');
 
nc{'pn'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'pn'}.long_name = ncchar('curvilinear coordinate metric in ETA');
nc{'pn'}.units = ncchar('meter-1');
nc{'pn'}.field = ncchar('pn, scalar');
 
nc{'dndx'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'dndx'}.long_name = ncchar('xi derivative of inverse metric factor pn');
nc{'dndx'}.units = ncchar('meter');
nc{'dndx'}.field = ncchar('dndx, scalar');
 
nc{'dmde'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'dmde'}.long_name = ncchar('eta derivative of inverse metric factor pm');
nc{'dmde'}.units = ncchar('meter');
nc{'dmde'}.field = ncchar('dmde, scalar');
 
nc{'x_rho'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'x_rho'}.long_name = ncchar('x location of RHO-points');
nc{'x_rho'}.units = ncchar('meter');
 
nc{'y_rho'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'y_rho'}.long_name = ncchar('y location of RHO-points');
nc{'y_rho'}.units = ncchar('meter');
 
nc{'x_psi'} = ncdouble('eta_psi', 'xi_psi'); %% 16641 elements.
nc{'x_psi'}.long_name = ncchar('x location of PSI-points');
nc{'x_psi'}.units = ncchar('meter');
 
nc{'y_psi'} = ncdouble('eta_psi', 'xi_psi'); %% 16641 elements.
nc{'y_psi'}.long_name = ncchar('y location of PSI-points');
nc{'y_psi'}.units = ncchar('meter');
 
nc{'x_u'} = ncdouble('eta_u', 'xi_u'); %% 16770 elements.
nc{'x_u'}.long_name = ncchar('x location of U-points');
nc{'x_u'}.units = ncchar('meter');
 
nc{'y_u'} = ncdouble('eta_u', 'xi_u'); %% 16770 elements.
nc{'y_u'}.long_name = ncchar('y location of U-points');
nc{'y_u'}.units = ncchar('meter');
 
nc{'x_v'} = ncdouble('eta_v', 'xi_v'); %% 16770 elements.
nc{'x_v'}.long_name = ncchar('x location of V-points');
nc{'x_v'}.units = ncchar('meter');
 
nc{'y_v'} = ncdouble('eta_v', 'xi_v'); %% 16770 elements.
nc{'y_v'}.long_name = ncchar('y location of V-points');
nc{'y_v'}.units = ncchar('meter');
 
nc{'lat_rho'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'lat_rho'}.long_name = ncchar('latitude of RHO-points');
nc{'lat_rho'}.units = ncchar('degree_north');
 
nc{'lon_rho'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'lon_rho'}.long_name = ncchar('longitude of RHO-points');
nc{'lon_rho'}.units = ncchar('degree_east');
 
nc{'lat_psi'} = ncdouble('eta_psi', 'xi_psi'); %% 16641 elements.
nc{'lat_psi'}.long_name = ncchar('latitude of PSI-points');
nc{'lat_psi'}.units = ncchar('degree_north');
 
nc{'lon_psi'} = ncdouble('eta_psi', 'xi_psi'); %% 16641 elements.
nc{'lon_psi'}.long_name = ncchar('longitude of PSI-points');
nc{'lon_psi'}.units = ncchar('degree_east');
 
nc{'lat_u'} = ncdouble('eta_u', 'xi_u'); %% 16770 elements.
nc{'lat_u'}.long_name = ncchar('latitude of U-points');
nc{'lat_u'}.units = ncchar('degree_north');
 
nc{'lon_u'} = ncdouble('eta_u', 'xi_u'); %% 16770 elements.
nc{'lon_u'}.long_name = ncchar('longitude of U-points');
nc{'lon_u'}.units = ncchar('degree_east');
 
nc{'lat_v'} = ncdouble('eta_v', 'xi_v'); %% 16770 elements.
nc{'lat_v'}.long_name = ncchar('latitude of V-points');
nc{'lat_v'}.units = ncchar('degree_north');
 
nc{'lon_v'} = ncdouble('eta_v', 'xi_v'); %% 16770 elements.
nc{'lon_v'}.long_name = ncchar('longitude of V-points');
nc{'lon_v'}.units = ncchar('degree_east');
 
nc{'mask_rho'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'mask_rho'}.long_name = ncchar('mask on RHO-points');
nc{'mask_rho'}.option_0_ = ncchar('land');
nc{'mask_rho'}.option_1_ = ncchar('water');
name(nc{'mask_rho'}.option_0_, 'option(0)')
name(nc{'mask_rho'}.option_1_, 'option(1)')
 
nc{'mask_u'} = ncdouble('eta_u', 'xi_u'); %% 16770 elements.
nc{'mask_u'}.long_name = ncchar('mask on U-points');
nc{'mask_u'}.option_0_ = ncchar('land');
nc{'mask_u'}.option_1_ = ncchar('water');
name(nc{'mask_u'}.option_0_, 'option(0)')
name(nc{'mask_u'}.option_1_, 'option(1)')
%	nc{'mask_u'}.FillValue_ = ncdouble(1);
 
nc{'mask_v'} = ncdouble('eta_v', 'xi_v'); %% 16770 elements.
nc{'mask_v'}.long_name = ncchar('mask on V-points');
nc{'mask_v'}.option_0_ = ncchar('land');
nc{'mask_v'}.option_1_ = ncchar('water');
name(nc{'mask_v'}.option_0_, 'option(0)')
name(nc{'mask_v'}.option_1_, 'option(1)')
%	nc{'mask_v'}.FillValue_ = ncdouble(1);
 
nc{'mask_psi'} = ncdouble('eta_psi', 'xi_psi'); %% 16641 elements.
nc{'mask_psi'}.long_name = ncchar('mask on PSI-points');
nc{'mask_psi'}.option_0_ = ncchar('land');
nc{'mask_psi'}.option_1_ = ncchar('water');
name(nc{'mask_psi'}.option_0_, 'option(0)')
name(nc{'mask_psi'}.option_1_, 'option(1)')
%	nc{'mask_psi'}.FillValue_ = ncdouble(1);

% Now, what about depths: "h" and "hraw".  <== DEPTHS.

% The following seems mistaken:
 
nc{'angle'} = ncdouble('eta_rho', 'xi_rho'); %% 16900 elements.
nc{'angle'}.long_name = ncchar('angle between xi axis and east');
nc{'angle'}.units = ncchar('degree');

% Fill the variables with data.

disp(' ## Filling Variables...')

switch lower(projection)
case 'mercator'
	theProjection = 'ME';
case 'stereographic'
	theProjection = 'ST';
case 'lambert conformal conic'
	theProjection = 'LC';
end

% Fill the variables.

nc{'JPRJ'}(:) = theProjection;
nc{'spherical'}(:) = 'T';

nc{'x_rho'}(:) = grid_x(i_rho, j_rho);
nc{'y_rho'}(:) = grid_y(i_rho, j_rho);

nc{'x_psi'}(:) = grid_x(i_psi, j_psi);
nc{'y_psi'}(:) = grid_y(i_psi, j_psi);

% [size(nc{'x_u'}) size(grid_x(i_u, j_u))]

nc{'x_u'}(:) = grid_x(i_u, j_u);
nc{'y_u'}(:) = grid_y(i_u, j_u);

nc{'x_v'}(:) = grid_x(i_v, j_v);
nc{'y_v'}(:) = grid_y(i_v, j_v);

nc{'lon_rho'}(:) = geogrid_lon(i_rho, j_rho);
nc{'lat_rho'}(:) = geogrid_lat(i_rho, j_rho);

nc{'lon_psi'}(:) = geogrid_lon(i_psi, j_psi);
nc{'lat_psi'}(:) = geogrid_lat(i_psi, j_psi);

nc{'lon_u'}(:) = geogrid_lon(i_u, j_u);
nc{'lat_u'}(:) = geogrid_lat(i_u, j_u);

nc{'lon_v'}(:) = geogrid_lon(i_v, j_v);
nc{'lat_v'}(:) = geogrid_lat(i_v, j_v);

whos

nc{'h'}(:) = bathymetry;

water = zeros(m, n);
water(2:2:end, 2:2:end) = 1 - mask;

nc{'mask_rho'}(:) = water(i_rho, j_rho);
nc{'mask_psi'}(:) = water(i_psi, j_psi);
nc{'mask_u'}(:) = water(i_u, j_u);
nc{'mask_v'}(:) = water(i_v, j_v);

temp = 0.5*(ang(1:end-1, :) + ang(2:end, :));
ang = zeros(m, n);
ang(2:2:end, 2:2:end) = temp;

nc{'angle'}(:) = ang(i_rho, j_rho);

if (0)
	sx = abs(spaced_x(:, 2:end) - spaced_x(:, 1:end-1));
	sy = abs(spaced_x(2:end, :) - spaced_x(1:end-1, :));
elseif (0)
	sx = abs(spaced_x(1:2:end, 3:2:end) - spaced_x(1:2:end, 1:2:end-2));
	sy = abs(spaced_y(3:2:end, 1:2:end) - spaced_y(1:2:end-2, 1:2:end));
	sx = 0.5 * (sx(1:end-1, :) + sx(2:end, :));
	sy = 0.5 * (sy(:, 1:end-1) + sy(:, 2:end));
end

% Use geometry from seagrid file.
% Note: need half the number of points.

gx = geometry{1};   % Spherical distances in meters.
gy = geometry{2};

% raw_grid_size = [m, n]

% geometry_sizes = [size(gx) size(gy)]

sx = 0.5*(gx(1:end-1, :) + gx(2:end, :));
sy = 0.5*(gy(:, 1:end-1) + gy(:, 2:end));

% raw_s_sizes = [size(sx) size(sy)]

% sx = sx(2:end-1, :);
% sy = sy(:, 2:end-1);

pm = 1 ./ sx;
pn = 1 ./ sy;

% p_sizes = [size(pm) size(pn)]

dmde = zeros(size(pm));
dndx = zeros(size(pn));

dmde(:, 2:end-1) = 0.5*(1./pm(:, 3:end) - 1./pm(:, 1:end-2));
dndx(2:end-1, :) = 0.5*(1./pn(3:end, :) - 1./pn(1:end-2, :));

% d_sizes = [size(dmde) size(dndx)]

% dmde = dmde(:, 1:2:end);
% dndx = dndx(1:2:end, :);

nc{'pm'}(:) = pm;
nc{'pn'}(:) = pn;

% [size(dmde) size(nc{'dmde'})]

nc{'dmde'}(:) = dmde;

% [size(dndx) size(nc{'dndx'})]

nc{'dndx'}(:) = dndx;

% Final size of file:

s = size(nc);
disp([' ## Dimensions: ' int2str(s(1))])
disp([' ## Variables: ' int2str(s(2))])
disp([' ## Global Attributes: ' int2str(s(3))])
disp([' ## Record Dimension: ' name(recdim(nc))])
 
endef(nc)
close(nc)