1039 lines
37 KiB
Fortran
1039 lines
37 KiB
Fortran
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
!
|
|
! This routine reads remapping information from files written
|
|
! by remap_setup. If remapping in both directions are required,
|
|
! two input files must be specified.
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! CVS:$Id: remap_read.f,v 1.6 2000/04/19 21:56:26 pwjones Exp $
|
|
!
|
|
! Copyright (c) 1997, 1998 the Regents of the University of
|
|
! California.
|
|
!
|
|
! This software and ancillary information (herein called software)
|
|
! called SCRIP is made available under the terms described here.
|
|
! The software has been approved for release with associated
|
|
! LA-CC Number 98-45.
|
|
!
|
|
! Unless otherwise indicated, this software has been authored
|
|
! by an employee or employees of the University of California,
|
|
! operator of the Los Alamos National Laboratory under Contract
|
|
! No. W-7405-ENG-36 with the U.S. Department of Energy. The U.S.
|
|
! Government has rights to use, reproduce, and distribute this
|
|
! software. The public may copy and use this software without
|
|
! charge, provided that this Notice and any statement of authorship
|
|
! are reproduced on all copies. Neither the Government nor the
|
|
! University makes any warranty, express or implied, or assumes
|
|
! any liability or responsibility for the use of this software.
|
|
!
|
|
! If software is modified to produce derivative works, such modified
|
|
! software should be clearly marked, so as not to confuse it with
|
|
! the version available from Los Alamos National Laboratory.
|
|
!
|
|
!***********************************************************************
|
|
|
|
module remap_read
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! contains routines for reading a remap file
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
use kinds_mod ! defines common data types
|
|
use constants ! defines useful constants
|
|
use grids ! includes all grid information
|
|
use netcdf_mod ! module with netcdf vars and utilities
|
|
use remap_vars ! module for all required remapping variables
|
|
|
|
implicit none
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! module variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! various netCDF ids for files variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
integer (kind=int_kind), private :: & ! netCDF ids
|
|
ncstat, nc_file_id, &
|
|
nc_srcgrdsize_id, nc_dstgrdsize_id, &
|
|
nc_srcgrdcorn_id, nc_dstgrdcorn_id, &
|
|
nc_srcgrdrank_id, nc_dstgrdrank_id, &
|
|
nc_srcgrddims_id, nc_dstgrddims_id, &
|
|
nc_numlinks_id, nc_numwgts_id, &
|
|
nc_srcgrdimask_id, nc_dstgrdimask_id, &
|
|
nc_srcgrdcntrlat_id, nc_srcgrdcntrlon_id, &
|
|
nc_srcgrdcrnrlat_id, nc_srcgrdcrnrlon_id, &
|
|
nc_srcgrdarea_id, nc_srcgrdfrac_id, &
|
|
nc_dstgrdcntrlat_id, nc_dstgrdcntrlon_id, &
|
|
nc_dstgrdcrnrlat_id, nc_dstgrdcrnrlon_id, &
|
|
nc_dstgrdarea_id, nc_dstgrdfrac_id, &
|
|
nc_srcgrdadd_id, nc_dstgrdadd_id, nc_rmpmatrix_id
|
|
|
|
!***********************************************************************
|
|
|
|
contains
|
|
|
|
!***********************************************************************
|
|
|
|
subroutine read_remap(map_name, interp_file)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! this driver routine reads some global attributes and then
|
|
! calls a specific read routine based on file conventions
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! input variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
character(char_len), intent(in) :: &
|
|
interp_file ! filename for remap data
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! output variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
character(char_len), intent(out) :: &
|
|
map_name ! name for mapping
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! local variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
character(char_len) :: &
|
|
map_method & ! character string for map_type
|
|
, normalize_opt & ! character string for normalization option
|
|
, convention ! character string for output convention
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! open file and read some global information
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_open(interp_file, NF_NOWRITE, nc_file_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!***
|
|
!*** map name
|
|
!***
|
|
map_name = ' '
|
|
ncstat = nf_get_att_text(nc_file_id, NF_GLOBAL, 'title', &
|
|
map_name)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
print *,'Reading remapping:',trim(map_name)
|
|
print *,'From file:',trim(interp_file)
|
|
|
|
!***
|
|
!*** normalization option
|
|
!***
|
|
normalize_opt = ' '
|
|
ncstat = nf_get_att_text(nc_file_id, NF_GLOBAL, 'normalization', &
|
|
normalize_opt)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case(normalize_opt)
|
|
case ('none')
|
|
norm_opt = norm_opt_none
|
|
case ('fracarea')
|
|
norm_opt = norm_opt_frcarea
|
|
case ('destarea')
|
|
norm_opt = norm_opt_dstarea
|
|
case default
|
|
print *,'normalize_opt = ',normalize_opt
|
|
stop 'Invalid normalization option'
|
|
end select
|
|
|
|
!***
|
|
!*** map method
|
|
!***
|
|
map_method = ' '
|
|
ncstat = nf_get_att_text (nc_file_id, NF_GLOBAL, 'map_method', &
|
|
map_method)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case(map_method)
|
|
case('Conservative remapping')
|
|
map_type = map_type_conserv
|
|
case('Bilinear remapping')
|
|
map_type = map_type_bilinear
|
|
case('Distance weighted avg of nearest neighbors')
|
|
map_type = map_type_distwgt
|
|
case('Bicubic remapping')
|
|
map_type = map_type_bicubic
|
|
case default
|
|
print *,'map_type = ',map_method
|
|
stop 'Invalid Map Type'
|
|
end select
|
|
|
|
!***
|
|
!*** file convention
|
|
!***
|
|
convention = ' '
|
|
ncstat = nf_get_att_text (nc_file_id, NF_GLOBAL, 'conventions', &
|
|
convention)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! call appropriate read routine based on output convention
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
select case(convention)
|
|
case ('SCRIP')
|
|
call read_remap_scrip
|
|
case ('NCAR-CSM')
|
|
call read_remap_csm
|
|
case default
|
|
print *,'convention = ',convention
|
|
stop 'unknown output file convention'
|
|
end select
|
|
|
|
!-----------------------------------------------------------------------
|
|
|
|
end subroutine read_remap
|
|
|
|
!***********************************************************************
|
|
|
|
subroutine read_remap_scrip
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! the routine reads a netCDF file to extract remapping info
|
|
! in SCRIP format
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! local variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
character (char_len) :: &
|
|
grid1_name & ! grid name for source grid
|
|
, grid2_name ! grid name for dest grid
|
|
|
|
integer (kind=int_kind) :: &
|
|
n ! dummy index
|
|
|
|
integer (kind=int_kind), dimension(:), allocatable :: &
|
|
grid1_mask_int, & ! integer masks to determine
|
|
grid2_mask_int ! cells that participate in map
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! read some additional global attributes
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
!***
|
|
!*** source and destination grid names
|
|
!***
|
|
|
|
grid1_name = ' '
|
|
grid2_name = ' '
|
|
ncstat = nf_get_att_text (nc_file_id, NF_GLOBAL, 'source_grid', &
|
|
grid1_name)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_att_text (nc_file_id, NF_GLOBAL, 'dest_grid', &
|
|
grid2_name)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
print *,' '
|
|
print *,'Remapping between:',trim(grid1_name)
|
|
print *,'and ',trim(grid2_name)
|
|
print *,' '
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! read dimension information
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'src_grid_size', &
|
|
nc_srcgrdsize_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_srcgrdsize_id, grid1_size)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'dst_grid_size', &
|
|
nc_dstgrdsize_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_dstgrdsize_id, grid2_size)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'src_grid_corners', &
|
|
nc_srcgrdcorn_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_srcgrdcorn_id, &
|
|
grid1_corners)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'dst_grid_corners', &
|
|
nc_dstgrdcorn_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_dstgrdcorn_id, &
|
|
grid2_corners)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'src_grid_rank', &
|
|
nc_srcgrdrank_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_srcgrdrank_id, &
|
|
grid1_rank)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'dst_grid_rank', &
|
|
nc_dstgrdrank_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_dstgrdrank_id, &
|
|
grid2_rank)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'num_links', &
|
|
nc_numlinks_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_numlinks_id, &
|
|
num_links_map1)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'num_wgts', &
|
|
nc_numwgts_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_numwgts_id, num_wts)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! allocate arrays
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
allocate( grid1_dims (grid1_rank), &
|
|
grid1_center_lat(grid1_size), &
|
|
grid1_center_lon(grid1_size), &
|
|
grid1_area (grid1_size), &
|
|
grid1_frac (grid1_size), &
|
|
grid1_mask (grid1_size), &
|
|
grid1_mask_int (grid1_size), &
|
|
grid1_corner_lat(grid1_corners, grid1_size), &
|
|
grid1_corner_lon(grid1_corners, grid1_size) )
|
|
|
|
allocate( grid2_dims (grid2_rank), &
|
|
grid2_center_lat(grid2_size), &
|
|
grid2_center_lon(grid2_size), &
|
|
grid2_area (grid2_size), &
|
|
grid2_frac (grid2_size), &
|
|
grid2_mask (grid2_size), &
|
|
grid2_mask_int (grid2_size), &
|
|
grid2_corner_lat(grid2_corners, grid2_size), &
|
|
grid2_corner_lon(grid2_corners, grid2_size) )
|
|
|
|
allocate( grid1_add_map1(num_links_map1), &
|
|
grid2_add_map1(num_links_map1), &
|
|
wts_map1(num_wts,num_links_map1) )
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! get variable ids
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_dims', &
|
|
nc_srcgrddims_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_imask', &
|
|
nc_srcgrdimask_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_center_lat', &
|
|
nc_srcgrdcntrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_center_lon', &
|
|
nc_srcgrdcntrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_corner_lat', &
|
|
nc_srcgrdcrnrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_corner_lon', &
|
|
nc_srcgrdcrnrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_area', &
|
|
nc_srcgrdarea_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_frac', &
|
|
nc_srcgrdfrac_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_dims', &
|
|
nc_dstgrddims_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_imask', &
|
|
nc_dstgrdimask_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_center_lat', &
|
|
nc_dstgrdcntrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_center_lon', &
|
|
nc_dstgrdcntrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_corner_lat', &
|
|
nc_dstgrdcrnrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_corner_lon', &
|
|
nc_dstgrdcrnrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_area', &
|
|
nc_dstgrdarea_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_frac', &
|
|
nc_dstgrdfrac_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_address', &
|
|
nc_srcgrdadd_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_address', &
|
|
nc_dstgrdadd_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'remap_matrix', &
|
|
nc_rmpmatrix_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! read all variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_srcgrddims_id, &
|
|
grid1_dims)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_srcgrdimask_id, &
|
|
grid1_mask_int)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcntrlat_id, &
|
|
grid1_center_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcntrlon_id, &
|
|
grid1_center_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
grid1_units = ' '
|
|
ncstat = nf_get_att_text(nc_file_id, nc_srcgrdcntrlat_id, 'units', &
|
|
grid1_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid1_units(1:7))
|
|
case ('degrees')
|
|
grid1_center_lat = grid1_center_lat*deg2rad
|
|
grid1_center_lon = grid1_center_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid1 center lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcrnrlat_id, &
|
|
grid1_corner_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcrnrlon_id, &
|
|
grid1_corner_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
grid1_units = ' '
|
|
ncstat = nf_get_att_text(nc_file_id, nc_srcgrdcrnrlat_id, 'units', &
|
|
grid1_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid1_units(1:7))
|
|
case ('degrees')
|
|
grid1_corner_lat = grid1_corner_lat*deg2rad
|
|
grid1_corner_lon = grid1_corner_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid1 corner lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdarea_id, &
|
|
grid1_area)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdfrac_id, &
|
|
grid1_frac)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_dstgrddims_id, &
|
|
grid2_dims)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_dstgrdimask_id, &
|
|
grid2_mask_int)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcntrlat_id, &
|
|
grid2_center_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcntrlon_id, &
|
|
grid2_center_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
grid2_units = ' '
|
|
ncstat = nf_get_att_text(nc_file_id, nc_dstgrdcntrlat_id, 'units', &
|
|
grid2_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid2_units(1:7))
|
|
case ('degrees')
|
|
grid2_center_lat = grid2_center_lat*deg2rad
|
|
grid2_center_lon = grid2_center_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid2 center lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcrnrlat_id, &
|
|
grid2_corner_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcrnrlon_id, &
|
|
grid2_corner_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
grid2_units = ' '
|
|
ncstat = nf_get_att_text(nc_file_id, nc_dstgrdcrnrlat_id, 'units', &
|
|
grid2_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid2_units(1:7))
|
|
case ('degrees')
|
|
grid2_corner_lat = grid2_corner_lat*deg2rad
|
|
grid2_corner_lon = grid2_corner_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid2 corner lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdarea_id, &
|
|
grid2_area)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdfrac_id, &
|
|
grid2_frac)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_srcgrdadd_id, &
|
|
grid1_add_map1)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_dstgrdadd_id, &
|
|
grid2_add_map1)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_rmpmatrix_id, &
|
|
wts_map1)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! initialize logical mask
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
where (grid1_mask_int == 1)
|
|
grid1_mask = .true.
|
|
elsewhere
|
|
grid1_mask = .false.
|
|
endwhere
|
|
where (grid2_mask_int == 1)
|
|
grid2_mask = .true.
|
|
elsewhere
|
|
grid2_mask = .false.
|
|
endwhere
|
|
deallocate(grid1_mask_int, grid2_mask_int)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! close input file
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_close(nc_file_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!-----------------------------------------------------------------------
|
|
|
|
end subroutine read_remap_scrip
|
|
|
|
!***********************************************************************
|
|
|
|
subroutine read_remap_csm
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! the routine reads a netCDF file to extract remapping info
|
|
! in NCAR-CSM format
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! local variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
character (char_len) :: &
|
|
grid1_name & ! grid name for source grid
|
|
, grid2_name ! grid name for dest grid
|
|
|
|
integer (kind=int_kind) :: &
|
|
nc_numwgts1_id & ! extra netCDF id for num_wgts > 1
|
|
, nc_rmpmatrix2_id ! extra netCDF id for high-order remap matrix
|
|
|
|
real (kind=dbl_kind), dimension(:),allocatable :: &
|
|
wts1 ! CSM wants single array for 1st-order wts
|
|
|
|
real (kind=dbl_kind), dimension(:,:),allocatable :: &
|
|
wts2 ! write remaining weights in different array
|
|
|
|
integer (kind=int_kind) :: &
|
|
n ! dummy index
|
|
|
|
integer (kind=int_kind), dimension(:), allocatable :: &
|
|
grid1_mask_int, & ! integer masks to determine
|
|
grid2_mask_int ! cells that participate in map
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! read some additional global attributes
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
!***
|
|
!*** source and destination grid names
|
|
!***
|
|
|
|
grid1_name = ' '
|
|
grid2_name = ' '
|
|
ncstat = nf_get_att_text (nc_file_id, NF_GLOBAL, 'domain_a', &
|
|
grid1_name)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_att_text (nc_file_id, NF_GLOBAL, 'domain_b', &
|
|
grid2_name)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
print *,' '
|
|
print *,'Remapping between:',trim(grid1_name)
|
|
print *,'and ',trim(grid2_name)
|
|
print *,' '
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! read dimension information
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'n_a', nc_srcgrdsize_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_srcgrdsize_id, grid1_size)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'n_b', nc_dstgrdsize_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_dstgrdsize_id, grid2_size)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'nv_a', nc_srcgrdcorn_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_srcgrdcorn_id, &
|
|
grid1_corners)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'nv_b', nc_dstgrdcorn_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_dstgrdcorn_id, &
|
|
grid2_corners)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'src_grid_rank', &
|
|
nc_srcgrdrank_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_srcgrdrank_id, &
|
|
grid1_rank)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'dst_grid_rank', &
|
|
nc_dstgrdrank_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_dstgrdrank_id, &
|
|
grid2_rank)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'n_s', &
|
|
nc_numlinks_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_numlinks_id, &
|
|
num_links_map1)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_dimid(nc_file_id, 'num_wgts', &
|
|
nc_numwgts_id)
|
|
call netcdf_error_handler(ncstat)
|
|
ncstat = nf_inq_dimlen(nc_file_id, nc_numwgts_id, num_wts)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
if (num_wts > 1) then
|
|
ncstat = nf_inq_dimid(nc_file_id, 'num_wgts1', &
|
|
nc_numwgts1_id)
|
|
call netcdf_error_handler(ncstat)
|
|
endif
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! allocate arrays
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
allocate( grid1_dims (grid1_rank), &
|
|
grid1_center_lat(grid1_size), &
|
|
grid1_center_lon(grid1_size), &
|
|
grid1_area (grid1_size), &
|
|
grid1_frac (grid1_size), &
|
|
grid1_mask (grid1_size), &
|
|
grid1_mask_int (grid1_size), &
|
|
grid1_corner_lat(grid1_corners, grid1_size), &
|
|
grid1_corner_lon(grid1_corners, grid1_size) )
|
|
|
|
allocate( grid2_dims (grid2_rank), &
|
|
grid2_center_lat(grid2_size), &
|
|
grid2_center_lon(grid2_size), &
|
|
grid2_area (grid2_size), &
|
|
grid2_frac (grid2_size), &
|
|
grid2_mask (grid2_size), &
|
|
grid2_mask_int (grid2_size), &
|
|
grid2_corner_lat(grid2_corners, grid2_size), &
|
|
grid2_corner_lon(grid2_corners, grid2_size) )
|
|
|
|
allocate( grid1_add_map1(num_links_map1), &
|
|
grid2_add_map1(num_links_map1), &
|
|
wts_map1(num_wts,num_links_map1), &
|
|
wts1(num_links_map1), &
|
|
wts2(num_wts-1,num_links_map1) )
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! get variable ids
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'src_grid_dims', &
|
|
nc_srcgrddims_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'mask_a', &
|
|
nc_srcgrdimask_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'yc_a', nc_srcgrdcntrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'xc_a', nc_srcgrdcntrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'yv_a', nc_srcgrdcrnrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'xv_a', nc_srcgrdcrnrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'area_a', nc_srcgrdarea_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'frac_a', nc_srcgrdfrac_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'dst_grid_dims', &
|
|
nc_dstgrddims_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'mask_b', &
|
|
nc_dstgrdimask_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'yc_b', nc_dstgrdcntrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'xc_b', nc_dstgrdcntrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'yv_b', nc_dstgrdcrnrlat_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'xv_b', nc_dstgrdcrnrlon_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'area_b', nc_dstgrdarea_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'frac_b', nc_dstgrdfrac_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'col', nc_srcgrdadd_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'row', nc_dstgrdadd_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_inq_varid(nc_file_id, 'S', nc_rmpmatrix_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
if (num_wts > 1) then
|
|
ncstat = nf_inq_varid(nc_file_id, 'S2', nc_rmpmatrix2_id)
|
|
call netcdf_error_handler(ncstat)
|
|
endif
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! read all variables
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_srcgrddims_id, &
|
|
grid1_dims)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_srcgrdimask_id, &
|
|
grid1_mask_int)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcntrlat_id, &
|
|
grid1_center_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcntrlon_id, &
|
|
grid1_center_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_att_text(nc_file_id, nc_srcgrdcntrlat_id, 'units', &
|
|
grid1_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid1_units(1:7))
|
|
case ('degrees')
|
|
grid1_center_lat = grid1_center_lat*deg2rad
|
|
grid1_center_lon = grid1_center_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid1 center lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcrnrlat_id, &
|
|
grid1_corner_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdcrnrlon_id, &
|
|
grid1_corner_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_att_text(nc_file_id, nc_srcgrdcrnrlat_id, 'units', &
|
|
grid1_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid1_units(1:7))
|
|
case ('degrees')
|
|
grid1_corner_lat = grid1_corner_lat*deg2rad
|
|
grid1_corner_lon = grid1_corner_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid1 corner lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdarea_id, &
|
|
grid1_area)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_srcgrdfrac_id, &
|
|
grid1_frac)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_dstgrddims_id, &
|
|
grid2_dims)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_dstgrdimask_id, &
|
|
grid2_mask_int)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcntrlat_id, &
|
|
grid2_center_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcntrlon_id, &
|
|
grid2_center_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_att_text(nc_file_id, nc_dstgrdcntrlat_id, 'units', &
|
|
grid2_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid2_units(1:7))
|
|
case ('degrees')
|
|
grid2_center_lat = grid2_center_lat*deg2rad
|
|
grid2_center_lon = grid2_center_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid2 center lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcrnrlat_id, &
|
|
grid2_corner_lat)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdcrnrlon_id, &
|
|
grid2_corner_lon)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
|
|
ncstat = nf_get_att_text(nc_file_id, nc_dstgrdcrnrlat_id, 'units', &
|
|
grid2_units)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
select case (grid2_units(1:7))
|
|
case ('degrees')
|
|
grid2_corner_lat = grid2_corner_lat*deg2rad
|
|
grid2_corner_lon = grid2_corner_lon*deg2rad
|
|
case ('radians')
|
|
!*** no conversion necessary
|
|
case default
|
|
print *,'unknown units supplied for grid2 corner lat/lon: '
|
|
print *,'proceeding assuming radians'
|
|
end select
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdarea_id, &
|
|
grid2_area)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_dstgrdfrac_id, &
|
|
grid2_frac)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_srcgrdadd_id, &
|
|
grid1_add_map1)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_int(nc_file_id, nc_dstgrdadd_id, &
|
|
grid2_add_map1)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
ncstat = nf_get_var_double(nc_file_id, nc_rmpmatrix_id, &
|
|
wts1)
|
|
wts_map1(1,:) = wts1
|
|
deallocate(wts1)
|
|
|
|
if (num_wts > 1) then
|
|
ncstat = nf_get_var_double(nc_file_id, nc_rmpmatrix2_id, &
|
|
wts2)
|
|
wts_map1(2:,:) = wts2
|
|
deallocate(wts2)
|
|
endif
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! initialize logical mask
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
where (grid1_mask_int == 1)
|
|
grid1_mask = .true.
|
|
elsewhere
|
|
grid1_mask = .false.
|
|
endwhere
|
|
where (grid2_mask_int == 1)
|
|
grid2_mask = .true.
|
|
elsewhere
|
|
grid2_mask = .false.
|
|
endwhere
|
|
deallocate(grid1_mask_int, grid2_mask_int)
|
|
|
|
!-----------------------------------------------------------------------
|
|
!
|
|
! close input file
|
|
!
|
|
!-----------------------------------------------------------------------
|
|
|
|
ncstat = nf_close(nc_file_id)
|
|
call netcdf_error_handler(ncstat)
|
|
|
|
!-----------------------------------------------------------------------
|
|
|
|
end subroutine read_remap_csm
|
|
|
|
!***********************************************************************
|
|
|
|
end module remap_read
|
|
|
|
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|