orog_mask_tools 1.14.0
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mask.f90
1 program mask_netcdf
2
3! Convert the UMD land use data to netcdf.
4
5 use netcdf
6
7 implicit none
8
9 integer*4, parameter :: idim=43200
10 integer*4, parameter :: jdim=21600
11 integer*4, parameter :: idim_p1=43201
12 integer*4, parameter :: jdim_p1=21601
13
14 character(len=150) :: filenetcdf, fileraw
15
16 integer :: i, istat, ncid, status, dim_i, dim_j
17 integer :: dim_ip1, dim_jp1
18 integer :: id_lon, id_lat, id_data
19 integer :: id_lat_corner, id_lon_corner
20
21 integer(kind=1), allocatable :: mask(:,:)
22
23 real(kind=8), allocatable :: lats(:), lons(:)
24 real(kind=8), allocatable :: lats_corner(:), lons_corner(:)
25 real(kind=8) :: lat11, lon11, dx, dy
26
27 dx = 1.0_8/120.0_8
28 dy = -(1.0_8/120.0_8)
29
30 lat11 = 90.0_8 + dy*0.5_8
31 lon11 = -180.0_8 + dx*0.5_8
32
33 allocate(lons(idim),lats(jdim),mask(idim,jdim))
34 allocate(lons_corner(idim_p1),lats_corner(jdim_p1))
35
36 do i = 1, idim
37 lons(i) = real((i-1),8) * dx + lon11
38 print*,'lon ',i,lons(i)
39 enddo
40
41 do i = 1, jdim
42 lats(i) = real((i-1),8) * dy + lat11
43 print*,'lat ',i,lats(i)
44 enddo
45
46 lat11 = 90.0_8
47 lon11 = -180.0_8
48
49 do i = 1, idim_p1
50 lons_corner(i) = real((i-1),8) * dx + lon11
51 print*,'lon_corner ',i,lons_corner(i)
52 enddo
53
54 do i = 1, jdim_p1
55 lats_corner(i) = real((i-1),8) * dy + lat11
56 print*,'lat_corner ',i,lats_corner(i)
57 enddo
58
59 fileraw="/scratch3/NCEPDEV/global/role.glopara/fix/raw/orog/landcover30.fixed"
60
61 open(11, file=trim(fileraw), access='direct', recl=idim*jdim)
62 read(11, rec=1, iostat=istat) mask
63 if (istat /= 0) stop 99
64 close(11)
65
66 print*,'mask ', maxval(mask),minval(mask)
67 where(mask > 0) mask = 1
68
69 filenetcdf="./landcover.umd.30s.nc"
70
71 print*,"- CREATE FILE: ", trim(filenetcdf)
72 status=nf90_create(filenetcdf, ior(nf90_netcdf4,nf90_classic_model), ncid)
73 if (status /= nf90_noerr) stop 1
74
75 status=nf90_def_dim(ncid, 'idim', idim, dim_i)
76 if (status /= nf90_noerr) stop 3
77
78 status=nf90_def_dim(ncid, 'jdim', jdim, dim_j)
79 if (status /= nf90_noerr) stop 2
80
81 status=nf90_def_dim(ncid, 'idim_p1', (idim+1), dim_ip1)
82 if (status /= nf90_noerr) stop 4
83
84 status=nf90_def_dim(ncid, 'jdim_p1', (jdim+1), dim_jp1)
85 if (status /= nf90_noerr) stop 5
86
87 status=nf90_put_att(ncid, nf90_global, 'source', 'Univ. of Maryland land use data')
88 if (status /= nf90_noerr) stop 6
89
90 status=nf90_put_att(ncid, nf90_global, 'reference', 'http://glcf.umiacs.umd.edu/data/landcover/data.shtml')
91 if (status /= nf90_noerr) stop 66
92
93 status=nf90_put_att(ncid, nf90_global, 'projection', 'regular lat/lon')
94 if (status /= nf90_noerr) stop 67
95
96 status=nf90_def_var(ncid, 'lat', nf90_double, dim_j, id_lat)
97 if (status /= nf90_noerr) stop 17
98
99 status=nf90_put_att(ncid, id_lat, 'long_name', 'grid cell center latitude')
100 if (status /= nf90_noerr) stop 10
101
102 status=nf90_put_att(ncid, id_lat, 'units', 'degrees')
103 if (status /= nf90_noerr) stop 65
104
105 status=nf90_def_var(ncid, 'lat_corner', nf90_double, dim_jp1, id_lat_corner)
106 if (status /= nf90_noerr) stop 37
107
108 status=nf90_put_att(ncid, id_lat_corner, 'long_name', 'grid cell corner latitude')
109 if (status /= nf90_noerr) stop 38
110
111 status=nf90_put_att(ncid, id_lat_corner, 'units', 'degrees')
112 if (status /= nf90_noerr) stop 68
113
114 status=nf90_def_var(ncid, 'lon', nf90_double, dim_i, id_lon)
115 if (status /= nf90_noerr) stop 16
116
117 status=nf90_put_att(ncid, id_lon, 'long_name', 'grid cell center longitude')
118 if (status /= nf90_noerr) stop 10
119
120 status=nf90_put_att(ncid, id_lon, 'units', 'degrees')
121 if (status /= nf90_noerr) stop 69
122
123 status=nf90_def_var(ncid, 'lon_corner', nf90_double, dim_ip1, id_lon_corner)
124 if (status /= nf90_noerr) stop 16
125
126 status=nf90_put_att(ncid, id_lon_corner, 'long_name', 'grid cell corner longitude')
127 if (status /= nf90_noerr) stop 40
128
129 status=nf90_put_att(ncid, id_lon_corner, 'units', 'degrees')
130 if (status /= nf90_noerr) stop 70
131
132 status=nf90_def_var(ncid, 'land_mask', nf90_byte, (/dim_i,dim_j/), id_data)
133 if (status /= nf90_noerr) stop 20
134
135 status=nf90_put_att(ncid, id_data, 'units', 'category')
136 if (status /= nf90_noerr) stop 75
137
138 status=nf90_put_att(ncid, id_data, 'Non-land', int((/0/)))
139 if (status /= nf90_noerr) stop 55
140
141 status=nf90_put_att(ncid, id_data, 'Land', int((/1/)))
142 if (status /= nf90_noerr) stop 59
143
144 status=nf90_enddef(ncid)
145 if (status /= nf90_noerr) stop 22
146
147 status=nf90_put_var(ncid, id_lon, lons)
148 if (status /= nf90_noerr) stop 19
149
150 status=nf90_put_var(ncid, id_lon_corner, lons_corner)
151 if (status /= nf90_noerr) stop 59
152
153 status=nf90_put_var(ncid, id_lat, lats)
154 if (status /= nf90_noerr) stop 20
155
156 status=nf90_put_var(ncid, id_lat_corner, lats_corner)
157 if (status /= nf90_noerr) stop 57
158
159 status=nf90_put_var(ncid, id_data, mask)
160 if (status /= nf90_noerr) stop 24
161
162 status=nf90_close(ncid)
163
164 end program mask_netcdf