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! |
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! $Id: read_mask.f v 1. 2003/07/24 fletcher Exp $ |
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! |
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!_ --------------------------------------------------------------------- |
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!_ $Log: read_mask.f $ |
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!_ Revision 1. 24/07/2003 Sara Fletcher |
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!_ Started Coding |
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!_ |
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!*********************************************************************** |
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! |
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! NAME: READ_MASK.F |
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! |
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! DESCRIPTION: This program demonstrates how to read a 3-D netCDF region mask |
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! file. |
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! |
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! COMPILING: |
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! |
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! f77 -o read_mask.x read_mask.f libnetcdf.a |
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! |
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! VARIABLES: |
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! imt, jmt: indices of the region mask in the input file |
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! filename = Name of Net CDF file |
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! ndyetrac = Number of dye regions (30 or 16) |
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! region_index = 2-D array containing a region index which assigns each |
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! ocean region to a different index value |
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! region_mask = 3-D (i,j,ndyetrac) array. Gridboxes included in each |
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! model region are set to 1 and those not included are set |
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! to 0. |
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! |
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!*********************************************************************** |
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|
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PROGRAM read_mask |
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|
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! No implicit declarations |
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IMPLICIT NONE |
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INCLUDE 'netcdf.inc' |
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|
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! define variables |
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CHARACTER*256 string256,filename |
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INTEGER ndyetrac,imt,jmt, i,j,n |
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PARAMETER (ndyetrac=30) !Equals 30 or 16 |
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PARAMETER (imt= 96, jmt=40) |
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REAL*4 lon(imt) |
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REAL*4 lat(jmt) |
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CHARACTER*30, reg_name(ndyetrac) |
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CHARACTER*1, string1 |
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CHARACTER*2, string2 |
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INTEGER region_index(imt,jmt) |
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INTEGER mask_temp(imt,jmt), region_mask(imt,jmt,ndyetrac) |
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|
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|
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INTEGER*4 NC_ID, STATUS |
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INTEGER*4 idlon, idlat, idtrac, idindex, idmask(ndyetrac) |
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|
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|
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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! Generate region names |
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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|
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do i=1,ndyetrac |
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if (i.lt.10) then |
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write(string1,'(I1.1)') i |
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reg_name(i)='region'//string1 |
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else |
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write(string2,'(I2.2)') i |
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reg_name(i)='region'//string2 |
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endif |
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enddo |
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|
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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! NetCDF filename |
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! Either 30reg_regionmask.cdf or 16reg_regionmask.cdf |
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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|
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if (ndyetrac.eq.30) then |
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filename='30reg_regionmask.cdf' |
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else if (ndyetrac.eq.16) then |
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filename='16reg_regionmask.cdf' |
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endif |
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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! Open the NetCDF file |
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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STATUS=NF_OPEN(filename,NF_NOWRITE,NC_ID) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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! Get the netCDF variable dimensions |
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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|
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STATUS=NF_INQ_DIMID(NC_ID,'tlon',idlon) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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STATUS=NF_INQ_DIMID(NC_ID,'tlat',idlat) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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STATUS=NF_INQ_VARID(NC_ID,'reg_indx',idindex) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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do i=1,ndyetrac |
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STATUS=NF_INQ_VARID(NC_ID,reg_name(i),idmask(i)) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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enddo |
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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! READ the netCDF DATA |
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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|
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STATUS=NF_GET_VAR_REAL(NC_ID,idlon, lon) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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STATUS=NF_GET_VAR_REAL(NC_ID,idlat,lat) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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STATUS=NF_GET_VAR_INT(NC_ID,idindex,region_index) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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do n=1,ndyetrac |
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STATUS=NF_GET_VAR_INT(NC_ID,idmask(n),mask_temp) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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do i=1,imt |
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do j=1,jmt |
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region_mask(i,j,n)=0 |
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if(mask_temp(i,j).eq.1)region_mask(i,j,n)=1 |
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write(10,*),i,j,lon(i),lat(j),n,region_mask(i,j,n) |
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enddo |
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enddo |
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enddo |
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|
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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! Close the NetCDF file |
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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STATUS=NF_CLOSE(NC_ID) |
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IF (STATUS.NE.NF_NOERR) CALL HANDLE_ERRORS(STATUS) |
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|
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END |
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|
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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! Error handling subroutine |
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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SUBROUTINE HANDLE_ERRORS(STATUS) |
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|
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INCLUDE 'netcdf.inc' |
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INTEGER*4 STATUS |
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|
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IF (STATUS .NE. nf_noerr) THEN |
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PRINT *, nf_strerror(STATUS) |
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STOP 'stopped' |
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ENDIF |
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|
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END |
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|
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!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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