program plotgrids
use map_utils
implicit none
! Parameters
integer, parameter :: MAX_DOMAINS = 21
! Variables
integer :: iproj_type, n_domains, io_form_output, dyn_opt
integer :: i, j, max_dom, funit, io_form_geogrid
integer :: interval_seconds
integer, dimension(MAX_DOMAINS) :: parent_grid_ratio, parent_id, ixdim, jydim
integer, dimension(MAX_DOMAINS) :: i_parent_start, j_parent_start, &
s_we, e_we, s_sn, e_sn, &
start_year, start_month, start_day, start_hour, &
end_year, end_month, end_day, end_hour
logical, dimension(MAX_DOMAINS) :: active_grid
real :: known_lat, known_lon, stand_lon, truelat1, truelat2, known_x, known_y, &
dxkm, dykm, ref_lat, ref_lon, ref_x, ref_y
real :: dx, dy
real :: ri, rj, rlats, rlons, rlate, rlone
real :: polat , rot
real :: rparent_gridpts
real :: xa,xb,ya,yb,xxa,xxy,yya,yyb
real :: xs, xe, ys, ye
integer :: jproj, jgrid, jlts, iusout, idot, ier
integer :: ltype , idom
real, dimension(MAX_DOMAINS) :: parent_ll_x, parent_ll_y, parent_ur_x, parent_ur_y
character (len=128) :: geog_data_path, opt_output_from_geogrid_path, opt_geogrid_tbl_path
character (len=128), dimension(MAX_DOMAINS) :: geog_data_res
character (len=128) :: map_proj
character (len=128), dimension(MAX_DOMAINS) :: start_date, end_date
character (len=3) :: wrf_core
character (len=1) :: gridtype
logical :: do_tiled_output
integer :: debug_level
logical :: is_used
logical :: nocolons
integer :: isize
type (proj_info) :: map_projection
namelist /share/ wrf_core, max_dom, start_date, end_date, &
start_year, end_year, start_month, end_month, &
start_day, end_day, start_hour, end_hour, &
interval_seconds, io_form_geogrid, opt_output_from_geogrid_path, &
debug_level, active_grid, nocolons
namelist /geogrid/ parent_id, parent_grid_ratio, &
i_parent_start, j_parent_start, s_we, e_we, s_sn, e_sn, &
map_proj, ref_x, ref_y, ref_lat, ref_lon, &
truelat1, truelat2, stand_lon, dx, dy, &
geog_data_res, geog_data_path, opt_geogrid_tbl_path
! Set defaults for namelist variables
debug_level = 0
io_form_geogrid = 2
wrf_core = 'ARW'
max_dom = 1
geog_data_path = 'NOT_SPECIFIED'
ref_x = NAN
ref_y = NAN
ref_lat = NAN
ref_lon = NAN
dx = 10000.
dy = 10000.
map_proj = 'Lambert'
truelat1 = NAN
truelat2 = NAN
stand_lon = NAN
do i=1,MAX_DOMAINS
geog_data_res(i) = 'default'
parent_id(i) = 1
parent_grid_ratio(i) = INVALID
s_we(i) = 1
e_we(i) = INVALID
s_sn(i) = 1
e_sn(i) = INVALID
start_year(i) = 0
start_month(i) = 0
start_day(i) = 0
start_hour(i) = 0
end_year(i) = 0
end_month(i) = 0
end_day(i) = 0
end_hour(i) = 0
start_date(i) = '0000-00-00_00:00:00'
end_date(i) = '0000-00-00_00:00:00'
end do
opt_output_from_geogrid_path = './'
opt_geogrid_tbl_path = 'geogrid/'
interval_seconds = INVALID
! Read parameters from Fortran namelist
do funit=10,100
inquire(unit=funit, opened=is_used)
if (.not. is_used) exit
end do
open(funit,file='namelist.wps',status='old',form='formatted',err=1000)
read(funit,share)
read(funit,geogrid)
close(funit)
dxkm = dx
dykm = dy
known_lat = ref_lat
known_lon = ref_lon
known_x = ref_x
known_y = ref_y
! Convert wrf_core to uppercase letters
do i=1,3
if (ichar(wrf_core(i:i)) >= 97) wrf_core(i:i) = char(ichar(wrf_core(i:i))-32)
end do
! Before doing anything else, we must have a valid grid type
gridtype = ' '
if (wrf_core == 'ARW') then
gridtype = 'C'
dyn_opt = 2
else if (wrf_core == 'NMM') then
gridtype = 'E'
dyn_opt = 4
end if
if (gridtype /= 'C' .and. gridtype /= 'E') then
write(6,*) 'A valid wrf_core must be specified in the namelist. '// &
'Currently, only "ARW" and "NMM" are supported.'
stop
end if
if (max_dom > MAX_DOMAINS) then
write(6,*) 'In namelist, max_dom must be <= ',MAX_DOMAINS,'. To run with more'// &
' than ',MAX_DOMAINS,' domains, increase the MAX_DOMAINS parameter.'
stop
end if
! Every domain must have a valid parent id
do i=2,max_dom
if (parent_id(i) <= 0 .or. parent_id(i) >= i) then
write(6,*) 'In namelist, the parent_id of domain ',i,' must be in '// &
'the range 1 to ',i-1
stop
end if
end do
! Convert map_proj to uppercase letters
do i=1,len(map_proj)
if (ichar(map_proj(i:i)) >= 97) map_proj(i:i) = char(ichar(map_proj(i:i))-32)
end do
! Assign parameters to module variables
if ((index(map_proj, 'LAMBERT') /= 0) .and. &
(len_trim(map_proj) == len('LAMBERT'))) then
iproj_type = PROJ_LC
rot=truelat1
polat=truelat2
jproj = 3
else if ((index(map_proj, 'MERCATOR') /= 0) .and. &
(len_trim(map_proj) == len('MERCATOR'))) then
iproj_type = PROJ_MERC
rot=0.
polat=0.
jproj = 9
else if ((index(map_proj, 'POLAR') /= 0) .and. &
(len_trim(map_proj) == len('POLAR'))) then
iproj_type = PROJ_PS
rot=0.
polat=SIGN(90., ref_lat)
jproj = 1
else if ((index(map_proj, 'ROTATED_LL') /= 0) .and. &
(len_trim(map_proj) == len('ROTATED_LL'))) then
iproj_type = PROJ_ROTLL
else
write(6,*) 'In namelist, invalid map_proj specified. Valid '// &
'projections are "lambert", "mercator", "polar", '// &
'and "rotated_ll".'
stop
end if
n_domains = max_dom
do i=1,n_domains
ixdim(i) = e_we(i) - s_we(i) + 1
jydim(i) = e_sn(i) - s_sn(i) + 1
end do
! If the user hasn't supplied a known_x and known_y, assume the center of domain 1
if (known_x == NAN) known_x = ixdim(1) / 2.
if (known_y == NAN) known_y = jydim(1) / 2.
! Checks specific to C grid
if (gridtype == 'C') then
! C grid does not support the rotated lat/lon projection
if (iproj_type == PROJ_ROTLL) then
write(6,*) 'Rotated lat/lon projection is not supported for the ARW core. '// &
'Valid projecitons are "lambert", "mercator", and "polar".'
stop
end if
! Check that nests have an acceptable number of grid points in each dimension
do i=2,n_domains
rparent_gridpts = real(ixdim(i)-1)/real(parent_grid_ratio(i))
if (floor(rparent_gridpts) /= ceiling(rparent_gridpts)) then
write(6,*) 'For nest ',i,' (e_we-s_we+1) must be one greater than an '// &
'integer multiple of the parent_grid_ratio.'
write(6,*) 'Current values are s_we(i) = ',s_we(i),' e_we(i) = ',e_we(i)
isize = nint(real(ixdim(i)-1)/real(parent_grid_ratio(i)))
write(6,*) 'An e_we = ',isize * parent_grid_ratio(i) + 1,' might work'
stop
end if
rparent_gridpts = real(jydim(i)-1)/real(parent_grid_ratio(i))
if (floor(rparent_gridpts) /= ceiling(rparent_gridpts)) then
write(6,*) 'For nest ',i,' (e_sn-s_sn+1) must be one greater than an '// &
'integer multiple of the parent_grid_ratio.'
write(6,*) ' Current values are, s_sn(i) = ',s_sn(i),' e_sn(i) = ',e_sn(i)
isize = nint(real(jydim(i)-1)/real(parent_grid_ratio(i)))
write(6,*) 'An e_sn = ',isize * parent_grid_ratio(i) + 1,' might work'
stop
end if
end do
end if
! Checks specific to E grid
if (gridtype == 'E') then
! E grid supports only the rotated lat/lon projection
if (iproj_type /= PROJ_ROTLL) then
write(6,*) 'Rotated lat/lon is the only supported projection for the NMM core.'
stop
end if
! Check that the parent_grid_ratio is set to 3 for all nests
do i=2,n_domains
if (parent_grid_ratio(i) /= 3) then
write(6,*) 'The parent_grid_ratio must be set to 3 for the NMM core.'
stop
end if
end do
CALL plot_e_grid ( ref_lat , -1. * ref_lon , &
dy , dx, &
n_domains , &
e_we , e_sn , &
parent_id , parent_grid_ratio , &
i_parent_start , j_parent_start )
stop
end if
do i=1,n_domains
parent_ll_x(i) = real(i_parent_start(i))
parent_ll_y(i) = real(j_parent_start(i))
parent_ur_x(i) = real(i_parent_start(i))+real(ixdim(i))/real(parent_grid_ratio(i))-1.
parent_ur_y(i) = real(j_parent_start(i))+real(jydim(i))/real(parent_grid_ratio(i))-1.
end do
call map_init(map_projection)
call map_set(iproj_type, map_projection, &
lat1=known_lat, &
lon1=known_lon, &
knowni=known_x, &
knownj=known_y, &
dx=dx, &
stdlon=stand_lon, &
truelat1=truelat1, &
truelat2=truelat2, &
ixdim=ixdim(1), &
jydim=jydim(1))
call ij_to_latlon(map_projection, 0.5, 0.5, rlats, rlons)
call ij_to_latlon(map_projection, real(e_we(1))-0.5, real(e_sn(1))-0.5, rlate, rlone)
call opngks
! Set some colors
call gscr(1, 0, 1.00, 1.00, 1.00)
call gscr(1, 1, 0.00, 0.00, 0.00)
! Do not grind them with details
jgrid=10
jlts=-2
iusout=1
idot=0
call supmap(jproj,polat,stand_lon,rot,&
rlats,rlons,rlate,rlone, &
jlts,jgrid,iusout,idot,ier)
call setusv('LW',1000)
call perim(e_we(1)-1,1,e_sn(1)-1,1)
call getset(xa,xb,ya,yb,xxa,xxy,yya,yyb,ltype)
call set (xa,xb,ya,yb, &
1.,real(e_we(1)),1.,real(e_sn(1)),ltype)
do idom = 2 , max_dom
call getxy ( xs, xe, ys, ye, &
idom , max_dom , &
e_we , e_sn , &
parent_id , parent_grid_ratio , &
i_parent_start , j_parent_start )
call line ( xs , ys , xe , ys )
call line ( xe , ys , xe , ye )
call line ( xe , ye , xs , ye )
call line ( xs , ye , xs , ys )
end do
call frame
write(6,*) ' '
write(6,*) 'Creating plot in NCAR Graphics metafile...'
write(6,*) ' '
call clsgks
write(6,*) ' *** Successful completion of program plotgrids.exe *** '
stop
1000 write(6,*) 'Error opening namelist.wps'
stop
end program plotgrids
subroutine getxy ( xs, xe, ys, ye, &
dom_id , num_domains , &
e_we , e_sn , &
parent_id , parent_grid_ratio , &
i_parent_start , j_parent_start )
implicit none
integer , intent(in) :: dom_id
integer , intent(in) :: num_domains
integer , intent(in) , dimension(num_domains):: e_we , e_sn , &
parent_id , parent_grid_ratio , &
i_parent_start , j_parent_start
real , intent(out) :: xs, xe, ys, ye
! local vars
integer :: idom
xs = 0.
xe = e_we(dom_id) -1
ys = 0.
ye = e_sn(dom_id) -1
idom = dom_id
compute_xy : DO
xs = (i_parent_start(idom) + xs -1 ) / &
real(parent_grid_ratio(parent_id(idom)))
xe = xe / real(parent_grid_ratio(idom))
ys = (j_parent_start(idom) + ys -1 ) / &
real(parent_grid_ratio(parent_id(idom)))
ye = ye / real(parent_grid_ratio(idom))
idom = parent_id(idom)
if ( idom .EQ. 1 ) then
exit compute_xy
end if
END DO compute_xy
xs = xs + 1
xe = xs + xe
ys = ys + 1
ye = ys + ye
end subroutine getxy
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!! E GRID MAP INFO BELOW !!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE plot_e_grid ( rlat0d , rlon0d , dphd , dlmd, &
n_domains , &
e_we , e_sn , &
parent_id , parent_grid_ratio , &
i_parent_start , j_parent_start )
! This routine generates a gmeta file of the area covered by an Arakawa e-grid.
! We assume that NCAR Graphics has not been called yet (and will be closed
! upon exit). The required input fields are as from the WPS namelist file.
IMPLICIT NONE
! 15 April 2005 NCEP/EMC
! The Code and some instructions are provided by Tom BLACK to
! NCAR/DTC Meral Demirtas
! 4 May 2005 NCAR/DTC Meral DEMIRTAS
! - An include file (plot_inc) is added to get
! Domain size: IM,JM
! Central latitute and longnitute: RLAT0D,RLON0D
! Horizontal resolution: DPHD, DLMD
! Feb 2007 NCAR/MMM
! Turn into f90
! Add implicit none
! Remove non-mapping portions
! Make part of WPS domain plotting utility
! Dec 2008 NCAR/DTC
! Pass additional arguments to enable plotting of nests
! Input map parameters for E grid.
REAL , INTENT(IN) :: rlat0d , & ! latitude of grid center (degrees)
rlon0d ! longitude of grid center (degrees, times -1)
REAL , INTENT(IN) :: dphd , & ! angular distance between rows (degrees)
dlmd ! angular distance between adjacent H and V points (degrees)
INTEGER , INTENT(in) :: n_domains ! number of domains
INTEGER , INTENT(in) , DIMENSION(n_domains):: e_we , &
e_sn , &
parent_id , &
parent_grid_ratio , &
i_parent_start , &
j_parent_start
! Some local vars
REAL :: rlat1d , &
rlon1d
INTEGER :: im, & ! number of H points in odd rows
jm , & ! number of rows
ngpwe , &
ngpsn , &
ilowl , &
jlowl
INTEGER :: imt , imtjm
REAL :: latlft,lonlft,latrgt,lonrgt
im = e_we(1)-1
jm = e_sn(1)-1
imt=2*im-1
imtjm=imt*jm
rlat1d=rlat0d
rlon1d=rlon0d
ngpwe=2*im-1
ngpsn=jm
! Get lat and lon of left and right points.
CALL corners ( rlat1d,rlon1d,im,jm,rlat0d,rlon0d,dphd,dlmd,&
ngpwe,ngpsn,ilowl,jlowl,latlft,lonlft,latrgt,lonrgt)
! With corner points, make map background.
CALL mapbkg_egrid ( imt,jm,ilowl,jlowl,ngpwe,ngpsn,&
rlat0d,rlon0d,latlft,lonlft,latrgt,lonrgt,&
dlmd,dphd,&
n_domains,&
e_we,e_sn,&
parent_id,parent_grid_ratio,&
i_parent_start,j_parent_start)
END SUBROUTINE plot_e_grid
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE corners ( glatd,glond,im,jm,tph0d,tlm0d,dphd,dlmd,&
ngpwe,ngpsn,ilowl,jlowl,glatl,glonl,glatr,glonr)
IMPLICIT NONE
REAL , INTENT(IN) :: glatd,glond,tph0d,tlm0d,dphd,dlmd,&
glatl,glonl,glatr,glonr
INTEGER , INTENT(IN) :: im,jm,ngpwe,ngpsn
INTEGER , INTENT(OUT) :: ilowl,jlowl
! Local vars
REAL , PARAMETER :: d2r = 1.74532925E-2 , r2D = 1./D2R
REAL :: glat , glon , dph , dlm , tph0 , tlm0
REAL :: x , y , z , tlat , tlon , tlat1 , tlat2 , tlon1 , tlon2
REAL :: row , col
REAL :: dlm1 , dlm2 , d1 , d2 , d3 , d4 , dmin
INTEGER :: jmt , ii , jj , iuppr , juppr
INTEGER :: nrow , ncol
jmt = jm/2+1
! Convert from geodetic to transformed coordinates (degrees).
glat = glatd * d2r
glon = glond * d2r
dph = dphd * d2r
dlm = dlmd * d2r
tph0 = tph0d * d2r
tlm0 = tlm0d * d2r
x = COS(tph0) * COS(glat) * COS(glon-tlm0)+SIN(tph0) * SIN(glat)
y = -COS(glat) * SIN(glon-tlm0)
z = COS(tph0) * SIN(glat)-SIN(tph0) * COS(glat) * COS(glon-tlm0)
tlat = r2d * ATAN(z/SQRT(x*x + y*y))
tlon = r2d * ATAN(y/x)
! Find the real (non-integer) row and column of the input location on
! the filled e-grid.
row = tlat/dphd+jmt
col = tlon/dlmd+im
nrow = INT(row)
ncol = INT(col)
tlat = tlat * d2r
tlon = tlon * d2r
! E2 E3
!
!
! X
! E1 E4
tlat1 = (nrow-jmt) * dph
tlat2 = tlat1+dph
tlon1 = (ncol-im) * dlm
tlon2 = tlon1+dlm
dlm1 = tlon-tlon1
dlm2 = tlon-tlon2
d1 = ACOS(COS(tlat) * COS(tlat1) * COS(dlm1)+SIN(tlat) * SIN(tlat1))
d2 = ACOS(COS(tlat) * COS(tlat2) * COS(dlm1)+SIN(tlat) * SIN(tlat2))
d3 = ACOS(COS(tlat) * COS(tlat2) * COS(dlm2)+SIN(tlat) * SIN(tlat2))
d4 = ACOS(COS(tlat) * COS(tlat1) * COS(dlm2)+SIN(tlat) * SIN(tlat1))
dmin = MIN(d1,d2,d3,d4)
IF ( ABS(dmin-d1) .LT. 1.e-6 ) THEN
ii = ncol
jj = nrow
ELSE IF ( ABS(dmin-d2) .LT. 1.e-6 ) THEN
ii = ncol
jj = nrow+1
ELSE IF ( ABS(dmin-d3) .LT. 1.e-6 ) THEN
ii = ncol+1
jj = nrow+1
ELSE IF ( ABS(dmin-d4) .LT. 1.e-6 ) THEN
ii = ncol+1
jj = nrow
END IF
! Now find the i and j of the lower left corner of the desired grid
! region and of the upper right.
ilowl = ii-ngpwe/2
jlowl = jj-ngpsn/2
iuppr = ii+ngpwe/2
juppr = jj+ngpsn/2
! Find their geodetic coordinates.
CALL e2t2g(ilowl,jlowl,im,jm,tph0d,tlm0d,dphd,dlmd,glatl,glonl)
CALL e2t2g(iuppr,juppr,im,jm,tph0d,tlm0d,dphd,dlmd,glatr,glonr)
END SUBROUTINE corners
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE mapbkg_egrid ( imt,jm,ilowl,jlowl,ngpwe,ngpsn,&
rlat0d,rlon0d,glatl,glonl,glatr,glonr,&
dlmd,dphd,&
n_domains,&
e_we,e_sn,&
parent_id,parent_grid_ratio,&
i_parent_start , j_parent_start )
! IMPLICIT NONE
INTEGER , INTENT(in) :: n_domains
INTEGER , INTENT(in) , DIMENSION(n_domains):: e_we , e_sn , &
parent_id , parent_grid_ratio , &
i_parent_start , j_parent_start
! Some local vars
CHARACTER (LEN=97) :: string
INTEGER :: i
REAL :: xs, xe, ys, ye
! Yet more center lon messing around, hoo boy.
! clonx=180.-rlon0d
clonx=-rlon0d
! Open up NCAR Graphics
CALL opngks
CALL gopwk(8,9,3)
CALL gsclip(0)
! Make the background white, and the foreground black.
CALL gscr ( 1 , 0 , 1., 1., 1. )
CALL gscr ( 1 , 1 , 0., 0., 0. )
! Line width default thickness.
CALL setusv('LW',1000)
! Make map outline a solid line, not dots.
CALL mapsti('MV',8)
CALL mapsti('DO',0)
! Map outlines are political and states.
CALL mapstc('OU','PS')
! Cylindrical equidistant.
CALL maproj('CE',rlat0d,clonx,0.)
! Specify corner points.
CALL mapset('CO',glatl,glonl,glatr,glonr)
! Lat lon lines every 5 degrees.
CALL mapsti('GR',5)
! Map takes up this much real estate.
CALL mappos( 0.05 , 0.95 , 0.05 , 0.95 )
! Initialize and draw map.
CALL mapint
CALL mapdrw
! Line width twice default thickness.
CALL setusv('LW',2000)
! Add approx grid point tick marks
CALL perim(((imt+3)/2)-1,1,jm-1,1)
! Line width default thickness.
CALL setusv('LW',1000)
! Put on a quicky description.
WRITE ( string , FMT = '("E-GRID E_WE = ",I4,", E_SN = ",I4 , &
&", DX = ",F6.4,", DY = ",F6.4 , &
&", REF_LAT = ",F8.3,", REF_LON = ",F8.3)') &
(imt+3)/2,jm+1,dlmd,dphd,rlat0d,-1.*rlon0d
CALL getset(xa,xb,ya,yb,xxa,xxy,yya,yyb,ltype)
CALL pchiqu(xxa,yya-(yyb-yya)/20.,string,8.,0.,-1.)
CALL set (xa,xb,ya,yb,&
1.,real(e_we(1)),1.,real(e_sn(1)),ltype)
! Line width twice default thickness.
CALL setusv('LW',2000)
! Draw a box for each nest.
do i=2 , n_domains
call getxy ( xs, xe, ys, ye, &
i , n_domains , &
e_we , e_sn , &
parent_id , parent_grid_ratio , &
i_parent_start , j_parent_start )
call line ( xs , ys , xe , ys )
call line ( xe , ys , xe , ye )
call line ( xe , ye , xs , ye )
call line ( xs , ye , xs , ys )
end do
CALL frame
! Close workstation and NCAR Grpahics.
CALL gclwk(8)
CALL clsgks
END SUBROUTINE mapbkg_egrid
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
SUBROUTINE e2t2g ( ncol,nrow,im,jm,tph0d,tlm0d,dphd,dlmd,glatd,glond)
! IMPLICIT NONE
REAL , PARAMETER :: D2R=1.74532925E-2 , R2D=1./D2R
DPH=DPHD*D2R
DLM=DLMD*D2R
TPH0=TPH0D*D2R
TLM0=TLM0D*D2R
!*** FIND THE TRANSFORMED LAT (POSITIVE NORTH) AND LON (POSITIVE EAST)
TLATD=(NROW-(JM+1)/2)*DPHD
TLOND=(NCOL-IM)*DLMD
!*** NOW CONVERT TO GEODETIC LAT (POSITIVE NORTH) AND LON (POSITIVE EAST)
TLATR=TLATD*D2R
TLONR=TLOND*D2R
ARG1=SIN(TLATR)*COS(TPH0)+COS(TLATR)*SIN(TPH0)*COS(TLONR)
GLATR=ASIN(ARG1)
GLATD=GLATR*R2D
ARG2=COS(TLATR)*COS(TLONR)/(COS(GLATR)*COS(TPH0))- &
TAN(GLATR)*TAN(TPH0)
IF(ABS(ARG2).GT.1.)ARG2=ABS(ARG2)/ARG2
FCTR=1.
IF(TLOND.GT.0.)FCTR=-1.
GLOND=TLM0D+FCTR*ACOS(ARG2)*R2D
GLOND=-GLOND
END SUBROUTINE e2t2g