| 1 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
|---|
| 2 | ! |
|---|
| 3 | ! This program creates a remapping grid file for a lat/lon grid. |
|---|
| 4 | ! |
|---|
| 5 | !----------------------------------------------------------------------- |
|---|
| 6 | ! |
|---|
| 7 | ! CVS:$Id$ |
|---|
| 8 | ! |
|---|
| 9 | ! Copyright (c) 1997, 1998 the Regents of the University of |
|---|
| 10 | ! California. |
|---|
| 11 | ! |
|---|
| 12 | ! Unless otherwise indicated, this software has been authored |
|---|
| 13 | ! by an employee or employees of the University of California, |
|---|
| 14 | ! operator of the Los Alamos National Laboratory under Contract |
|---|
| 15 | ! No. W-7405-ENG-36 with the U.S. Department of Energy. The U.S. |
|---|
| 16 | ! Government has rights to use, reproduce, and distribute this |
|---|
| 17 | ! software. The public may copy and use this software without |
|---|
| 18 | ! charge, provided that this Notice and any statement of authorship |
|---|
| 19 | ! are reproduced on all copies. Neither the Government nor the |
|---|
| 20 | ! University makes any warranty, express or implied, or assumes |
|---|
| 21 | ! any liability or responsibility for the use of this software. |
|---|
| 22 | ! |
|---|
| 23 | !*********************************************************************** |
|---|
| 24 | |
|---|
| 25 | program create_latlon |
|---|
| 26 | |
|---|
| 27 | !----------------------------------------------------------------------- |
|---|
| 28 | ! |
|---|
| 29 | ! This file creates a remapping grid file for a Gaussian grid |
|---|
| 30 | ! |
|---|
| 31 | !----------------------------------------------------------------------- |
|---|
| 32 | |
|---|
| 33 | use kinds_mod |
|---|
| 34 | use constants |
|---|
| 35 | use iounits |
|---|
| 36 | use netcdf_mod |
|---|
| 37 | |
|---|
| 38 | implicit none |
|---|
| 39 | |
|---|
| 40 | !----------------------------------------------------------------------- |
|---|
| 41 | ! |
|---|
| 42 | ! variables that describe the grid |
|---|
| 43 | ! |
|---|
| 44 | !----------------------------------------------------------------------- |
|---|
| 45 | |
|---|
| 46 | integer (kind=int_kind), parameter :: |
|---|
| 47 | & nx = 360, ny = 180, |
|---|
| 48 | & grid_size = nx*ny, |
|---|
| 49 | & grid_rank = 2, |
|---|
| 50 | & grid_corners = 4 |
|---|
| 51 | |
|---|
| 52 | character(char_len), parameter :: |
|---|
| 53 | & grid_name = 'Lat/lon 1 degree Grid', |
|---|
| 54 | & grid_file_out = 'll1deg_grid.nc' |
|---|
| 55 | |
|---|
| 56 | integer (kind=int_kind), dimension(grid_rank) :: |
|---|
| 57 | & grid_dims |
|---|
| 58 | |
|---|
| 59 | !----------------------------------------------------------------------- |
|---|
| 60 | ! |
|---|
| 61 | ! grid coordinates and masks |
|---|
| 62 | ! |
|---|
| 63 | !----------------------------------------------------------------------- |
|---|
| 64 | |
|---|
| 65 | integer (kind=int_kind), dimension(grid_size) :: |
|---|
| 66 | & grid_imask |
|---|
| 67 | |
|---|
| 68 | real (kind=dbl_kind), dimension(grid_size) :: |
|---|
| 69 | & grid_center_lat, ! lat/lon coordinates for |
|---|
| 70 | & grid_center_lon ! each grid center in degrees |
|---|
| 71 | |
|---|
| 72 | real (kind=dbl_kind), dimension(grid_corners,grid_size) :: |
|---|
| 73 | & grid_corner_lat, ! lat/lon coordinates for |
|---|
| 74 | & grid_corner_lon ! each grid corner in degrees |
|---|
| 75 | |
|---|
| 76 | !----------------------------------------------------------------------- |
|---|
| 77 | ! |
|---|
| 78 | ! other local variables |
|---|
| 79 | ! |
|---|
| 80 | !----------------------------------------------------------------------- |
|---|
| 81 | |
|---|
| 82 | integer (kind=int_kind) :: i, j, iunit, atm_add |
|---|
| 83 | |
|---|
| 84 | integer (kind=int_kind) :: |
|---|
| 85 | & ncstat, ! general netCDF status variable |
|---|
| 86 | & nc_grid_id, ! netCDF grid dataset id |
|---|
| 87 | & nc_gridsize_id, ! netCDF grid size dim id |
|---|
| 88 | & nc_gridcorn_id, ! netCDF grid corner dim id |
|---|
| 89 | & nc_gridrank_id, ! netCDF grid rank dim id |
|---|
| 90 | & nc_griddims_id, ! netCDF grid dimension size id |
|---|
| 91 | & nc_grdcntrlat_id, ! netCDF grid center lat id |
|---|
| 92 | & nc_grdcntrlon_id, ! netCDF grid center lon id |
|---|
| 93 | & nc_grdimask_id, ! netCDF grid mask id |
|---|
| 94 | & nc_grdcrnrlat_id, ! netCDF grid corner lat id |
|---|
| 95 | & nc_grdcrnrlon_id ! netCDF grid corner lon id |
|---|
| 96 | |
|---|
| 97 | integer (kind=int_kind), dimension(2) :: |
|---|
| 98 | & nc_dims2_id ! netCDF dim id array for 2-d arrays |
|---|
| 99 | |
|---|
| 100 | real (kind=dbl_kind) :: dlon, minlon, maxlon, centerlon, |
|---|
| 101 | & dlat, minlat, maxlat, centerlat |
|---|
| 102 | |
|---|
| 103 | !----------------------------------------------------------------------- |
|---|
| 104 | ! |
|---|
| 105 | ! compute longitudes and latitudes of cell centers and corners. |
|---|
| 106 | ! |
|---|
| 107 | !----------------------------------------------------------------------- |
|---|
| 108 | |
|---|
| 109 | grid_dims(1) = nx |
|---|
| 110 | grid_dims(2) = ny |
|---|
| 111 | |
|---|
| 112 | dlon = 360./nx |
|---|
| 113 | dlat = 180./ny |
|---|
| 114 | |
|---|
| 115 | do j=1,ny |
|---|
| 116 | |
|---|
| 117 | minlat = -90._dbl_kind + (j-1)*dlat |
|---|
| 118 | maxlat = -90._dbl_kind + j *dlat |
|---|
| 119 | centerlat = minlat + half*dlat |
|---|
| 120 | |
|---|
| 121 | do i=1,nx |
|---|
| 122 | centerlon = (i-1)*dlon |
|---|
| 123 | minlon = centerlon - half*dlon |
|---|
| 124 | maxlon = centerlon + half*dlon |
|---|
| 125 | |
|---|
| 126 | atm_add = (j-1)*nx + i |
|---|
| 127 | |
|---|
| 128 | grid_center_lat(atm_add ) = centerlat |
|---|
| 129 | grid_corner_lat(1,atm_add) = minlat |
|---|
| 130 | grid_corner_lat(2,atm_add) = minlat |
|---|
| 131 | grid_corner_lat(3,atm_add) = maxlat |
|---|
| 132 | grid_corner_lat(4,atm_add) = maxlat |
|---|
| 133 | |
|---|
| 134 | grid_center_lon(atm_add ) = centerlon |
|---|
| 135 | grid_corner_lon(1,atm_add) = minlon |
|---|
| 136 | grid_corner_lon(2,atm_add) = maxlon |
|---|
| 137 | grid_corner_lon(3,atm_add) = maxlon |
|---|
| 138 | grid_corner_lon(4,atm_add) = minlon |
|---|
| 139 | end do |
|---|
| 140 | end do |
|---|
| 141 | |
|---|
| 142 | !----------------------------------------------------------------------- |
|---|
| 143 | ! |
|---|
| 144 | ! define mask |
|---|
| 145 | ! |
|---|
| 146 | !----------------------------------------------------------------------- |
|---|
| 147 | |
|---|
| 148 | grid_imask = 1 |
|---|
| 149 | |
|---|
| 150 | !----------------------------------------------------------------------- |
|---|
| 151 | ! |
|---|
| 152 | ! set up attributes for netCDF file |
|---|
| 153 | ! |
|---|
| 154 | !----------------------------------------------------------------------- |
|---|
| 155 | |
|---|
| 156 | !*** |
|---|
| 157 | !*** create netCDF dataset for this grid |
|---|
| 158 | !*** |
|---|
| 159 | |
|---|
| 160 | ncstat = nf_create (grid_file_out, NF_CLOBBER, |
|---|
| 161 | & nc_grid_id) |
|---|
| 162 | call netcdf_error_handler(ncstat) |
|---|
| 163 | |
|---|
| 164 | ncstat = nf_put_att_text (nc_grid_id, NF_GLOBAL, 'title', |
|---|
| 165 | & len_trim(grid_name), grid_name) |
|---|
| 166 | call netcdf_error_handler(ncstat) |
|---|
| 167 | |
|---|
| 168 | !*** |
|---|
| 169 | !*** define grid size dimension |
|---|
| 170 | !*** |
|---|
| 171 | |
|---|
| 172 | ncstat = nf_def_dim (nc_grid_id, 'grid_size', grid_size, |
|---|
| 173 | & nc_gridsize_id) |
|---|
| 174 | call netcdf_error_handler(ncstat) |
|---|
| 175 | |
|---|
| 176 | !*** |
|---|
| 177 | !*** define grid corner dimension |
|---|
| 178 | !*** |
|---|
| 179 | |
|---|
| 180 | ncstat = nf_def_dim (nc_grid_id, 'grid_corners', grid_corners, |
|---|
| 181 | & nc_gridcorn_id) |
|---|
| 182 | call netcdf_error_handler(ncstat) |
|---|
| 183 | |
|---|
| 184 | !*** |
|---|
| 185 | !*** define grid rank dimension |
|---|
| 186 | !*** |
|---|
| 187 | |
|---|
| 188 | ncstat = nf_def_dim (nc_grid_id, 'grid_rank', grid_rank, |
|---|
| 189 | & nc_gridrank_id) |
|---|
| 190 | call netcdf_error_handler(ncstat) |
|---|
| 191 | |
|---|
| 192 | !*** |
|---|
| 193 | !*** define grid dimension size array |
|---|
| 194 | !*** |
|---|
| 195 | |
|---|
| 196 | ncstat = nf_def_var (nc_grid_id, 'grid_dims', NF_INT, |
|---|
| 197 | & 1, nc_gridrank_id, nc_griddims_id) |
|---|
| 198 | call netcdf_error_handler(ncstat) |
|---|
| 199 | |
|---|
| 200 | !*** |
|---|
| 201 | !*** define grid center latitude array |
|---|
| 202 | !*** |
|---|
| 203 | |
|---|
| 204 | ncstat = nf_def_var (nc_grid_id, 'grid_center_lat', NF_DOUBLE, |
|---|
| 205 | & 1, nc_gridsize_id, nc_grdcntrlat_id) |
|---|
| 206 | call netcdf_error_handler(ncstat) |
|---|
| 207 | |
|---|
| 208 | ncstat = nf_put_att_text (nc_grid_id, nc_grdcntrlat_id, 'units', |
|---|
| 209 | & 7, 'degrees') |
|---|
| 210 | call netcdf_error_handler(ncstat) |
|---|
| 211 | |
|---|
| 212 | !*** |
|---|
| 213 | !*** define grid center longitude array |
|---|
| 214 | !*** |
|---|
| 215 | |
|---|
| 216 | ncstat = nf_def_var (nc_grid_id, 'grid_center_lon', NF_DOUBLE, |
|---|
| 217 | & 1, nc_gridsize_id, nc_grdcntrlon_id) |
|---|
| 218 | call netcdf_error_handler(ncstat) |
|---|
| 219 | |
|---|
| 220 | ncstat = nf_put_att_text (nc_grid_id, nc_grdcntrlon_id, 'units', |
|---|
| 221 | & 7, 'degrees') |
|---|
| 222 | call netcdf_error_handler(ncstat) |
|---|
| 223 | |
|---|
| 224 | !*** |
|---|
| 225 | !*** define grid mask |
|---|
| 226 | !*** |
|---|
| 227 | |
|---|
| 228 | ncstat = nf_def_var (nc_grid_id, 'grid_imask', NF_INT, |
|---|
| 229 | & 1, nc_gridsize_id, nc_grdimask_id) |
|---|
| 230 | call netcdf_error_handler(ncstat) |
|---|
| 231 | |
|---|
| 232 | ncstat = nf_put_att_text (nc_grid_id, nc_grdimask_id, 'units', |
|---|
| 233 | & 8, 'unitless') |
|---|
| 234 | call netcdf_error_handler(ncstat) |
|---|
| 235 | |
|---|
| 236 | !*** |
|---|
| 237 | !*** define grid corner latitude array |
|---|
| 238 | !*** |
|---|
| 239 | |
|---|
| 240 | nc_dims2_id(1) = nc_gridcorn_id |
|---|
| 241 | nc_dims2_id(2) = nc_gridsize_id |
|---|
| 242 | |
|---|
| 243 | ncstat = nf_def_var (nc_grid_id, 'grid_corner_lat', NF_DOUBLE, |
|---|
| 244 | & 2, nc_dims2_id, nc_grdcrnrlat_id) |
|---|
| 245 | call netcdf_error_handler(ncstat) |
|---|
| 246 | |
|---|
| 247 | ncstat = nf_put_att_text (nc_grid_id, nc_grdcrnrlat_id, 'units', |
|---|
| 248 | & 7, 'degrees') |
|---|
| 249 | call netcdf_error_handler(ncstat) |
|---|
| 250 | |
|---|
| 251 | !*** |
|---|
| 252 | !*** define grid corner longitude array |
|---|
| 253 | !*** |
|---|
| 254 | |
|---|
| 255 | ncstat = nf_def_var (nc_grid_id, 'grid_corner_lon', NF_DOUBLE, |
|---|
| 256 | & 2, nc_dims2_id, nc_grdcrnrlon_id) |
|---|
| 257 | call netcdf_error_handler(ncstat) |
|---|
| 258 | |
|---|
| 259 | ncstat = nf_put_att_text (nc_grid_id, nc_grdcrnrlon_id, 'units', |
|---|
| 260 | & 7, 'degrees') |
|---|
| 261 | call netcdf_error_handler(ncstat) |
|---|
| 262 | |
|---|
| 263 | !*** |
|---|
| 264 | !*** end definition stage |
|---|
| 265 | !*** |
|---|
| 266 | |
|---|
| 267 | ncstat = nf_enddef(nc_grid_id) |
|---|
| 268 | call netcdf_error_handler(ncstat) |
|---|
| 269 | |
|---|
| 270 | !----------------------------------------------------------------------- |
|---|
| 271 | ! |
|---|
| 272 | ! write grid data |
|---|
| 273 | ! |
|---|
| 274 | !----------------------------------------------------------------------- |
|---|
| 275 | |
|---|
| 276 | ncstat = nf_put_var_int(nc_grid_id, nc_griddims_id, grid_dims) |
|---|
| 277 | call netcdf_error_handler(ncstat) |
|---|
| 278 | |
|---|
| 279 | ncstat = nf_put_var_int(nc_grid_id, nc_grdimask_id, grid_imask) |
|---|
| 280 | call netcdf_error_handler(ncstat) |
|---|
| 281 | |
|---|
| 282 | ncstat = nf_put_var_double(nc_grid_id, nc_grdcntrlat_id, |
|---|
| 283 | & grid_center_lat) |
|---|
| 284 | call netcdf_error_handler(ncstat) |
|---|
| 285 | |
|---|
| 286 | ncstat = nf_put_var_double(nc_grid_id, nc_grdcntrlon_id, |
|---|
| 287 | & grid_center_lon) |
|---|
| 288 | call netcdf_error_handler(ncstat) |
|---|
| 289 | |
|---|
| 290 | ncstat = nf_put_var_double(nc_grid_id, nc_grdcrnrlat_id, |
|---|
| 291 | & grid_corner_lat) |
|---|
| 292 | call netcdf_error_handler(ncstat) |
|---|
| 293 | |
|---|
| 294 | ncstat = nf_put_var_double(nc_grid_id, nc_grdcrnrlon_id, |
|---|
| 295 | & grid_corner_lon) |
|---|
| 296 | call netcdf_error_handler(ncstat) |
|---|
| 297 | |
|---|
| 298 | ncstat = nf_close(nc_grid_id) |
|---|
| 299 | call netcdf_error_handler(ncstat) |
|---|
| 300 | |
|---|
| 301 | !----------------------------------------------------------------------- |
|---|
| 302 | |
|---|
| 303 | end program create_latlon |
|---|
| 304 | |
|---|
| 305 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
|---|
