306 lines
9.9 KiB
Fortran
Executable File
306 lines
9.9 KiB
Fortran
Executable File
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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!
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! This program creates a remapping grid file for a lat/lon grid.
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!
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!-----------------------------------------------------------------------
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!
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! CVS:$Id: create_latlon.f,v 1.1 2000/04/19 22:05:58 pwjones Exp $
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!
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! Copyright (c) 1997, 1998 the Regents of the University of
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! California.
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!
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! Unless otherwise indicated, this software has been authored
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! by an employee or employees of the University of California,
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! operator of the Los Alamos National Laboratory under Contract
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! No. W-7405-ENG-36 with the U.S. Department of Energy. The U.S.
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! Government has rights to use, reproduce, and distribute this
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! software. The public may copy and use this software without
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! charge, provided that this Notice and any statement of authorship
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! are reproduced on all copies. Neither the Government nor the
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! University makes any warranty, express or implied, or assumes
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! any liability or responsibility for the use of this software.
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!
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!***********************************************************************
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program create_latlon
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!-----------------------------------------------------------------------
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!
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! This file creates a remapping grid file for a Gaussian grid
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!
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!-----------------------------------------------------------------------
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use kinds_mod
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use constants
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use iounits
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use netcdf_mod
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implicit none
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!-----------------------------------------------------------------------
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!
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! variables that describe the grid
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!
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!-----------------------------------------------------------------------
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integer (kind=int_kind), parameter ::
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& nx = 360, ny = 180,
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& grid_size = nx*ny,
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& grid_rank = 2,
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& grid_corners = 4
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character(char_len), parameter ::
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& grid_name = 'Lat/lon 1 degree Grid',
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& grid_file_out = 'll1deg_grid.nc'
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integer (kind=int_kind), dimension(grid_rank) ::
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& grid_dims
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!-----------------------------------------------------------------------
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!
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! grid coordinates and masks
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!
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!-----------------------------------------------------------------------
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integer (kind=int_kind), dimension(grid_size) ::
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& grid_imask
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real (kind=dbl_kind), dimension(grid_size) ::
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& grid_center_lat, ! lat/lon coordinates for
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& grid_center_lon ! each grid center in degrees
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real (kind=dbl_kind), dimension(grid_corners,grid_size) ::
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& grid_corner_lat, ! lat/lon coordinates for
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& grid_corner_lon ! each grid corner in degrees
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!-----------------------------------------------------------------------
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!
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! other local variables
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!
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!-----------------------------------------------------------------------
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integer (kind=int_kind) :: i, j, iunit, atm_add
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integer (kind=int_kind) ::
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& ncstat, ! general netCDF status variable
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& nc_grid_id, ! netCDF grid dataset id
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& nc_gridsize_id, ! netCDF grid size dim id
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& nc_gridcorn_id, ! netCDF grid corner dim id
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& nc_gridrank_id, ! netCDF grid rank dim id
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& nc_griddims_id, ! netCDF grid dimension size id
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& nc_grdcntrlat_id, ! netCDF grid center lat id
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& nc_grdcntrlon_id, ! netCDF grid center lon id
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& nc_grdimask_id, ! netCDF grid mask id
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& nc_grdcrnrlat_id, ! netCDF grid corner lat id
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& nc_grdcrnrlon_id ! netCDF grid corner lon id
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integer (kind=int_kind), dimension(2) ::
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& nc_dims2_id ! netCDF dim id array for 2-d arrays
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real (kind=dbl_kind) :: dlon, minlon, maxlon, centerlon,
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& dlat, minlat, maxlat, centerlat
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!-----------------------------------------------------------------------
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!
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! compute longitudes and latitudes of cell centers and corners.
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!
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!-----------------------------------------------------------------------
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grid_dims(1) = nx
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grid_dims(2) = ny
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dlon = 360./nx
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dlat = 180./ny
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do j=1,ny
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minlat = -90._dbl_kind + (j-1)*dlat
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maxlat = -90._dbl_kind + j *dlat
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centerlat = minlat + half*dlat
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do i=1,nx
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centerlon = (i-1)*dlon
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minlon = centerlon - half*dlon
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maxlon = centerlon + half*dlon
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atm_add = (j-1)*nx + i
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grid_center_lat(atm_add ) = centerlat
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grid_corner_lat(1,atm_add) = minlat
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grid_corner_lat(2,atm_add) = minlat
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grid_corner_lat(3,atm_add) = maxlat
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grid_corner_lat(4,atm_add) = maxlat
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grid_center_lon(atm_add ) = centerlon
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grid_corner_lon(1,atm_add) = minlon
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grid_corner_lon(2,atm_add) = maxlon
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grid_corner_lon(3,atm_add) = maxlon
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grid_corner_lon(4,atm_add) = minlon
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end do
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end do
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!-----------------------------------------------------------------------
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!
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! define mask
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!
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!-----------------------------------------------------------------------
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grid_imask = 1
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!-----------------------------------------------------------------------
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!
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! set up attributes for netCDF file
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!
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!-----------------------------------------------------------------------
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!***
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!*** create netCDF dataset for this grid
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!***
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ncstat = nf_create (grid_file_out, NF_CLOBBER,
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& nc_grid_id)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_att_text (nc_grid_id, NF_GLOBAL, 'title',
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& len_trim(grid_name), grid_name)
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid size dimension
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!***
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ncstat = nf_def_dim (nc_grid_id, 'grid_size', grid_size,
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& nc_gridsize_id)
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid corner dimension
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!***
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ncstat = nf_def_dim (nc_grid_id, 'grid_corners', grid_corners,
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& nc_gridcorn_id)
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid rank dimension
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!***
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ncstat = nf_def_dim (nc_grid_id, 'grid_rank', grid_rank,
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& nc_gridrank_id)
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid dimension size array
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!***
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ncstat = nf_def_var (nc_grid_id, 'grid_dims', NF_INT,
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& 1, nc_gridrank_id, nc_griddims_id)
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid center latitude array
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!***
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ncstat = nf_def_var (nc_grid_id, 'grid_center_lat', NF_DOUBLE,
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& 1, nc_gridsize_id, nc_grdcntrlat_id)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_att_text (nc_grid_id, nc_grdcntrlat_id, 'units',
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& 7, 'degrees')
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid center longitude array
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!***
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ncstat = nf_def_var (nc_grid_id, 'grid_center_lon', NF_DOUBLE,
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& 1, nc_gridsize_id, nc_grdcntrlon_id)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_att_text (nc_grid_id, nc_grdcntrlon_id, 'units',
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& 7, 'degrees')
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid mask
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!***
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ncstat = nf_def_var (nc_grid_id, 'grid_imask', NF_INT,
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& 1, nc_gridsize_id, nc_grdimask_id)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_att_text (nc_grid_id, nc_grdimask_id, 'units',
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& 8, 'unitless')
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid corner latitude array
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!***
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nc_dims2_id(1) = nc_gridcorn_id
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nc_dims2_id(2) = nc_gridsize_id
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ncstat = nf_def_var (nc_grid_id, 'grid_corner_lat', NF_DOUBLE,
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& 2, nc_dims2_id, nc_grdcrnrlat_id)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_att_text (nc_grid_id, nc_grdcrnrlat_id, 'units',
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& 7, 'degrees')
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call netcdf_error_handler(ncstat)
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!***
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!*** define grid corner longitude array
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!***
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ncstat = nf_def_var (nc_grid_id, 'grid_corner_lon', NF_DOUBLE,
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& 2, nc_dims2_id, nc_grdcrnrlon_id)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_att_text (nc_grid_id, nc_grdcrnrlon_id, 'units',
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& 7, 'degrees')
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call netcdf_error_handler(ncstat)
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!***
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!*** end definition stage
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!***
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ncstat = nf_enddef(nc_grid_id)
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call netcdf_error_handler(ncstat)
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!-----------------------------------------------------------------------
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!
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! write grid data
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!
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!-----------------------------------------------------------------------
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ncstat = nf_put_var_int(nc_grid_id, nc_griddims_id, grid_dims)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_var_int(nc_grid_id, nc_grdimask_id, grid_imask)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_var_double(nc_grid_id, nc_grdcntrlat_id,
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& grid_center_lat)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_var_double(nc_grid_id, nc_grdcntrlon_id,
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& grid_center_lon)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_var_double(nc_grid_id, nc_grdcrnrlat_id,
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& grid_corner_lat)
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call netcdf_error_handler(ncstat)
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ncstat = nf_put_var_double(nc_grid_id, nc_grdcrnrlon_id,
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& grid_corner_lon)
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call netcdf_error_handler(ncstat)
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ncstat = nf_close(nc_grid_id)
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call netcdf_error_handler(ncstat)
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!-----------------------------------------------------------------------
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end program create_latlon
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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