| 1 | PROGRAM ncregular |
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| 2 | ! |
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| 3 | !$Id$ |
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| 4 | !--------------------------------------------------------------------- |
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| 5 | !- This code replaces a 2D surface grid by vectors. |
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| 6 | !- Obviously it only works if you have a regular grid. |
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| 7 | !- |
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| 8 | !- Jan Polcher (polcher@lmd.jussieu.fr) |
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| 9 | !- Jacques Bellier (jacques.bellier@cea.fr) |
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| 10 | !--------------------------------------------------------------------- |
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| 11 | USE netcdf |
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| 12 | !- |
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| 13 | IMPLICIT NONE |
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| 14 | !- |
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| 15 | INTEGER :: iread, if, in, iv, sz |
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| 16 | INTEGER :: ier, nb_files, iret, ndims, nvars, nb_glat |
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| 17 | INTEGER :: lon_dim_id, lat_dim_id |
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| 18 | INTEGER :: lon_len, lat_len, lon_id, lat_id |
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| 19 | INTEGER :: nav_lon_id, nav_lat_id |
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| 20 | INTEGER :: alloc_stat_lon, alloc_stat_lat |
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| 21 | !- |
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| 22 | INTEGER,ALLOCATABLE :: file_id(:), tax_id(:) |
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| 23 | CHARACTER(LEN=80),ALLOCATABLE :: names(:) |
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| 24 | CHARACTER(LEN=80) :: dim_name |
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| 25 | CHARACTER(LEN=80) :: varname |
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| 26 | CHARACTER(LEN=20) :: xname, yname, lonname, latname |
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| 27 | LOGICAL :: check, regular |
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| 28 | !- |
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| 29 | REAL,ALLOCATABLE :: lon(:), lat(:), lon2(:), lat2(:) |
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| 30 | REAL,ALLOCATABLE :: del_lon(:), del_lat(:) |
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| 31 | !- |
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| 32 | INTEGER iargc, getarg |
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| 33 | EXTERNAL iargc, getarg |
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| 34 | !--------------------------------------------------------------------- |
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| 35 | alloc_stat_lon = 0 |
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| 36 | alloc_stat_lat = 0 |
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| 37 | !- |
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| 38 | iread = iargc() |
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| 39 | !- |
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| 40 | ALLOCATE (names(iread),stat=ier) |
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| 41 | IF (ier /= 0) THEN |
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| 42 | WRITE (*,*) ' Could not allocate names of size ', iread |
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| 43 | STOP 'nctax' |
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| 44 | ENDIF |
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| 45 | !- |
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| 46 | CALL nct_getarg (iread, nb_files, names, check, & |
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| 47 | & xname, yname, lonname, latname) |
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| 48 | !- |
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| 49 | ! Allocate space |
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| 50 | !- |
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| 51 | ALLOCATE (file_id(nb_files),stat=ier) |
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| 52 | IF (ier /= 0) THEN |
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| 53 | WRITE (*,*) ' Could not allocate file_id of size ', nb_files |
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| 54 | STOP 'nctax' |
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| 55 | ENDIF |
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| 56 | !- |
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| 57 | ALLOCATE (tax_id(nb_files),stat=ier) |
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| 58 | IF (ier /= 0) THEN |
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| 59 | WRITE (*,*) ' Could not allocate tax_id of size ', nb_files |
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| 60 | STOP 'nctax' |
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| 61 | ENDIF |
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| 62 | !- |
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| 63 | DO if=1,nb_files |
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| 64 | !--- |
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| 65 | IF (check) THEN |
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| 66 | WRITE(*,*) 'ncregular : ', if, names(if) |
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| 67 | ENDIF |
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| 68 | !--- |
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| 69 | iret = NF90_OPEN (names(if),NF90_WRITE,file_id(if)) |
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| 70 | iret = NF90_INQUIRE (file_id(if),ndims,nvars,nb_glat,tax_id(if)) |
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| 71 | !--- |
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| 72 | !-- Get the IDs of the variables |
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| 73 | !--- |
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| 74 | lon_len = -9999 |
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| 75 | lat_len = -9999 |
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| 76 | DO in=1,ndims |
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| 77 | !----- |
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| 78 | iret = NF90_INQUIRE_DIMENSION (file_id(if), in, dim_name, sz) |
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| 79 | !----- |
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| 80 | IF ( (LEN_TRIM(dim_name) == 1) & |
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| 81 | & .AND.(INDEX(dim_name,TRIM(xname)) == 1) ) THEN |
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| 82 | lon_dim_id = in |
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| 83 | lon_len = sz |
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| 84 | ENDIF |
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| 85 | !----- |
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| 86 | IF ( (LEN_TRIM(dim_name) == 1) & |
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| 87 | & .AND.(INDEX(dim_name,TRIM(yname)) == 1) ) THEN |
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| 88 | lat_dim_id = in |
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| 89 | lat_len = sz |
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| 90 | ENDIF |
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| 91 | !----- |
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| 92 | ENDDO |
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| 93 | !--- |
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| 94 | IF ( (lon_len == -9999).OR.(lat_len == -9999) ) THEN |
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| 95 | WRITE(*,*) 'ncregular : The specified dimensions were not' |
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| 96 | WRITE(*,*) 'found in file : ',names(if) |
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| 97 | iret = NF90_CLOSE (file_id(if)) |
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| 98 | STOP |
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| 99 | ENDIF |
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| 100 | !--- |
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| 101 | IF (check) THEN |
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| 102 | WRITE(*,*) 'ncregular : lon_dim_id, lon_len',lon_dim_id,lon_len |
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| 103 | WRITE(*,*) 'ncregular : lat_dim_id, lat_len',lat_dim_id,lat_len |
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| 104 | ENDIF |
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| 105 | !--- |
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| 106 | !-- Look for the right variables |
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| 107 | !--- |
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| 108 | nav_lon_id = -9999 |
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| 109 | nav_lat_id = -9999 |
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| 110 | DO iv=1,nvars |
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| 111 | iret = NF90_INQUIRE_VARIABLE (file_id(if),iv,name=varname) |
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| 112 | IF (INDEX(varname,TRIM(lonname)) > 0) THEN |
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| 113 | nav_lon_id = iv |
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| 114 | ENDIF |
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| 115 | IF (INDEX(varname,TRIM(latname)) > 0) THEN |
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| 116 | nav_lat_id = iv |
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| 117 | ENDIF |
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| 118 | ENDDO |
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| 119 | !--- |
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| 120 | IF ( (nav_lon_id == -9999).OR.(nav_lat_id == -9999) ) THEN |
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| 121 | WRITE(*,*) 'ncregular : The specified coordinate fields' |
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| 122 | WRITE(*,*) 'were not found in file : ',names(if) |
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| 123 | iret = NF90_CLOSE (file_id(if)) |
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| 124 | STOP |
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| 125 | ENDIF |
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| 126 | !--- |
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| 127 | IF (check) THEN |
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| 128 | WRITE(*,*) 'ncregular : nav_lon_id :', nav_lon_id |
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| 129 | WRITE(*,*) 'ncregular : nav_lat_id :', nav_lat_id |
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| 130 | ENDIF |
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| 131 | !--- |
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| 132 | !-- Read variables from file and check if regular |
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| 133 | !--- |
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| 134 | !-- Do we have the variable to read the |
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| 135 | !--- |
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| 136 | IF ( alloc_stat_lon < lon_len) THEN |
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| 137 | IF ( alloc_stat_lon > 0) THEN |
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| 138 | deallocate(lon) |
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| 139 | deallocate(lon2) |
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| 140 | deallocate(del_lon) |
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| 141 | ENDIF |
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| 142 | allocate(lon(lon_len)) |
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| 143 | allocate(lon2(lon_len)) |
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| 144 | allocate(del_lon(lon_len)) |
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| 145 | alloc_stat_lon = lon_len |
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| 146 | ENDIF |
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| 147 | !--- |
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| 148 | IF ( alloc_stat_lat < lat_len) THEN |
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| 149 | IF ( alloc_stat_lat > 0) THEN |
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| 150 | deallocate(lat) |
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| 151 | deallocate(lat2) |
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| 152 | deallocate(del_lat) |
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| 153 | ENDIF |
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| 154 | allocate(lat(lat_len)) |
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| 155 | allocate(lat2(lat_len)) |
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| 156 | allocate(del_lat(lat_len)) |
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| 157 | alloc_stat_lat = lat_len |
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| 158 | ENDIF |
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| 159 | !--- |
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| 160 | !-- Read data |
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| 161 | !--- |
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| 162 | iret = NF90_GET_VAR (file_id(if),nav_lon_id,lon, & |
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| 163 | & start=(/1,1/),count=(/lon_len,1/),stride=(/1,1/)) |
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| 164 | iret = NF90_GET_VAR (file_id(if),nav_lon_id,lon2, & |
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| 165 | & start=(/1,int(lat_len/2)/),count=(/lon_len,1/),stride=(/1,1/)) |
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| 166 | del_lon = lon-lon2 |
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| 167 | !- |
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| 168 | iret = NF90_GET_VAR (file_id(if),nav_lat_id,lat, & |
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| 169 | & start=(/1,1/),count=(/1,lat_len/),stride=(/lon_len,1/)) |
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| 170 | iret = NF90_GET_VAR (file_id(if),nav_lat_id,lat2, & |
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| 171 | & start=(/int(lon_len/2),1/),count=(/1,lat_len/),stride=(/lon_len,1/)) |
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| 172 | del_lat = lat-lat2 |
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| 173 | !- |
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| 174 | regular = ( (MAXVAL(del_lon) < 0.001) & |
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| 175 | & .OR.(MAXVAL(del_lat) < 0.001) ) |
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| 176 | !--- |
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| 177 | !-- Create the new variables |
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| 178 | !--- |
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| 179 | IF (regular) THEN |
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| 180 | IF (check) THEN |
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| 181 | WRITE(*,*) 'Regular case' |
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| 182 | ENDIF |
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| 183 | iret = NF90_REDEF (file_id(if)) |
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| 184 | iret = NF90_RENAME_DIM (file_id(if), lon_dim_id, 'lon') |
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| 185 | iret = NF90_RENAME_DIM (file_id(if), lat_dim_id, 'lat') |
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| 186 | IF (check) THEN |
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| 187 | WRITE(*,*) 'Dimensions renamed' |
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| 188 | ENDIF |
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| 189 | iret = NF90_DEF_VAR (file_id(if), 'lon', NF90_FLOAT, & |
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| 190 | & lon_dim_id, lon_id) |
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| 191 | iret = NF90_DEF_VAR (file_id(if), 'lat', NF90_FLOAT, & |
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| 192 | & lat_dim_id, lat_id) |
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| 193 | IF (check) THEN |
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| 194 | WRITE(*,*) 'New variables defined' |
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| 195 | ENDIF |
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| 196 | !----- |
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| 197 | !---- Copy attributes |
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| 198 | !----- |
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| 199 | iret = NF90_COPY_ATT (file_id(if),nav_lon_id,'units', & |
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| 200 | & file_id(if),lon_id) |
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| 201 | iret = NF90_COPY_ATT (file_id(if),nav_lon_id,'title', & |
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| 202 | & file_id(if),lon_id) |
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| 203 | iret = NF90_COPY_ATT (file_id(if),nav_lon_id,'valid_max', & |
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| 204 | & file_id(if),lon_id) |
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| 205 | iret = NF90_COPY_ATT (file_id(if),nav_lon_id,'valid_min', & |
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| 206 | & file_id(if),lon_id) |
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| 207 | !----- |
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| 208 | iret = NF90_COPY_ATT (file_id(if),nav_lat_id,'units', & |
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| 209 | & file_id(if),lat_id) |
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| 210 | iret = NF90_COPY_ATT (file_id(if),nav_lat_id,'title', & |
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| 211 | & file_id(if),lat_id) |
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| 212 | iret = NF90_COPY_ATT (file_id(if),nav_lat_id,'valid_max', & |
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| 213 | & file_id(if),lat_id) |
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| 214 | iret = NF90_COPY_ATT (file_id(if),nav_lat_id,'valid_min', & |
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| 215 | & file_id(if),lat_id) |
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| 216 | !----- |
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| 217 | !---- Go into write mode |
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| 218 | !----- |
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| 219 | iret = NF90_ENDDEF (file_id(if)) |
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| 220 | !----- |
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| 221 | !---- Write data |
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| 222 | !----- |
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| 223 | iret = NF90_PUT_VAR (file_id(if),lon_id,lon(1:lon_len)) |
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| 224 | iret = NF90_PUT_VAR (file_id(if),lat_id,lat(1:lat_len)) |
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| 225 | !- |
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| 226 | iret = NF90_CLOSE (file_id(if)) |
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| 227 | ELSE |
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| 228 | WRITE(*,*) 'ncregular : Your grid is not regular' |
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| 229 | WRITE(*,*) names(if), 'remains unchanged' |
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| 230 | iret = NF90_CLOSE (file_id(if)) |
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| 231 | ENDIF |
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| 232 | !- |
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| 233 | ENDDO |
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| 234 | !-------------------- |
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| 235 | END PROGRAM ncregular |
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| 236 | !- |
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| 237 | !=== |
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| 238 | !- |
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| 239 | SUBROUTINE nct_getarg (argx, nb_files, names, check, & |
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| 240 | & xname, yname, lonname, latname) |
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| 241 | !--------------------------------------------------------------------- |
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| 242 | !- Read the arguments of nctax. |
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| 243 | !--------------------------------------------------------------------- |
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| 244 | INTEGER,INTENT(in) :: argx |
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| 245 | INTEGER, INTENT(out) :: nb_files |
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| 246 | CHARACTER(LEN=80),INTENT(out) :: names(argx) |
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| 247 | CHARACTER(LEN=20) :: xname, yname, lonname, latname |
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| 248 | !- |
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| 249 | CHARACTER(LEN=80) :: tmp, tmp_arg |
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| 250 | LOGICAL :: check |
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| 251 | !--------------------------------------------------------------------- |
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| 252 | check = .FALSE. |
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| 253 | !- |
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| 254 | ! Get the number of arguments |
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| 255 | !- |
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| 256 | nb_files = 0 |
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| 257 | !- |
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| 258 | xname = 'x' |
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| 259 | yname = 'y' |
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| 260 | lonname = 'nav_lon' |
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| 261 | latname = 'nav_lat' |
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| 262 | !- |
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| 263 | ! Go through the arguments and analyse them one by one |
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| 264 | !- |
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| 265 | IF (check) WRITE(*,*) 'Start going through the arguments' |
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| 266 | !- |
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| 267 | IF (argx == 0) THEN |
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| 268 | WRITE(*,*) 'To get usage : nctax -h ' |
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| 269 | STOP |
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| 270 | ENDIF |
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| 271 | !- |
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| 272 | iread = 1 |
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| 273 | DO WHILE (iread <= argx) |
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| 274 | iret = getarg(iread,tmp) |
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| 275 | IF (check) WRITE(*,*) ' iread, tmp :', iread, tmp |
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| 276 | SELECTCASE(tmp) |
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| 277 | CASE('-d') |
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| 278 | WRITE(*,*) 'DEBUG MODE SELECTED' |
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| 279 | check = .TRUE. |
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| 280 | iread = iread+1 |
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| 281 | CASE('-h') |
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| 282 | WRITE(*,*) 'Usage : nregular [options] file1 [file2 ...]' |
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| 283 | WRITE(*,*) ' -d : Verbose mode' |
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| 284 | WRITE(*,*) ' -h : This output' |
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| 285 | STOP |
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| 286 | CASE('-dim_lon') |
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| 287 | iread = iread+1 |
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| 288 | iret = getarg(iread,tmp_arg) |
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| 289 | xname = TRIM(tmp_arg) |
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| 290 | iread = iread+1 |
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| 291 | CASE('-dim_lat') |
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| 292 | iread = iread+1 |
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| 293 | iret = getarg(iread,tmp_arg) |
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| 294 | yname = TRIM(tmp_arg) |
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| 295 | iread = iread+1 |
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| 296 | CASE('-coo_lon') |
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| 297 | iread = iread+1 |
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| 298 | iret = getarg(iread,tmp_arg) |
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| 299 | lonname = TRIM(tmp_arg) |
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| 300 | iread = iread+1 |
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| 301 | CASE('-coo_lat') |
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| 302 | iread = iread+1 |
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| 303 | iret = getarg(iread,tmp_arg) |
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| 304 | latname = TRIM(tmp_arg) |
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| 305 | iread = iread+1 |
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| 306 | CASE DEFAULT |
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| 307 | IF (check) WRITE(*,*) 'nct_getarg : CASE default' |
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| 308 | IF (INDEX(tmp,'-') /= 1) THEN |
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| 309 | nb_files = nb_files+1 |
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| 310 | names(nb_files) = tmp |
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| 311 | iread = iread+1 |
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| 312 | ELSE |
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| 313 | WRITE(*,*) "WARNING Unknown option ",tmp |
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| 314 | WRITE(*,*) "For ore information : nctax -h" |
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| 315 | ENDIF |
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| 316 | END SELECT |
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| 317 | ENDDO |
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| 318 | !- |
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| 319 | IF (check) THEN |
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| 320 | WRITE(*,*) ' nct_getarg : output >> ' |
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| 321 | WRITE(*,*) '>> nb_files : ', nb_files |
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| 322 | WRITE(*,*) '>> names :', (names(ii), ii=1,nb_files) |
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| 323 | ENDIF |
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| 324 | !------------------------ |
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| 325 | END SUBROUTINE nct_getarg |
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