mirror of https://github.com/ecmwf/eccodes.git
131 lines
4.0 KiB
Fortran
131 lines
4.0 KiB
Fortran
C Copyright 2005-2014 ECMWF.
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C
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C This software is licensed under the terms of the Apache Licence Version 2.0
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C which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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C
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C In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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C virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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C
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C
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C Fortran 77 Implementation: get_fortran
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C
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C Description: how to get values using keys.
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C
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C
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C
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C
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program get
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implicit none
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integer maxNumberOfValues
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parameter( maxNumberOfValues = 10000 )
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include 'grib_api_fortran.h'
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integer ifile
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integer iret
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integer igrib
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integer i
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real*8 latitudeOfFirstPointInDegrees
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real*8 longitudeOfFirstPointInDegrees
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real*8 latitudeOfLastPointInDegrees
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real*8 longitudeOfLastPointInDegrees
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real*8 jDirectionIncrementInDegrees
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real*8 iDirectionIncrementInDegrees
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integer*4 numberOfPointsAlongAParallel
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integer*4 numberOfPointsAlongAMeridian
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real*8 values(maxNumberOfValues)
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integer*4 numberOfValues
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real*8 average
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character*256 error
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integer*4 size
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size=maxNumberOfValues
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ifile=5
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iret=grib_open_file(ifile
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X,'../data/reduced_latlon_surface.grib1','r')
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call grib_check(iret)
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C a new grib message is loaded from file
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C igrib is the grib id to be used in subsequent calls
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call grib_check( grib_new_from_file(ifile,igrib) )
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C get as a integer
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call grib_check(grib_get_int(igrib,'numberOfPointsAlongAParallel'
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X,numberOfPointsAlongAParallel) )
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write(*,*) 'numberOfPointsAlongAParallel='
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X,numberOfPointsAlongAParallel
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C get as a integer
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call grib_check( grib_get_int(igrib,'numberOfPointsAlongAMeridian'
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X,numberOfPointsAlongAMeridian) )
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write(*,*) 'numberOfPointsAlongAMeridian='
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X,numberOfPointsAlongAMeridian
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C get as a real8
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call grib_check( grib_get_real8(igrib
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X,'latitudeOfFirstGridPointInDegrees'
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X,latitudeOfFirstPointInDegrees) )
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write(*,*) 'latitudeOfFirstGridPointInDegrees='
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X,latitudeOfFirstPointInDegrees
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C get as a real8
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call grib_check( grib_get_real8(igrib
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X,'longitudeOfFirstGridPointInDegrees'
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X,longitudeOfFirstPointInDegrees) )
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write(*,*) 'longitudeOfFirstGridPointInDegrees='
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X,longitudeOfFirstPointInDegrees
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C get as a real8
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call grib_check( grib_get_real8(igrib
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X,'latitudeOfLastGridPointInDegrees'
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X,latitudeOfLastPointInDegrees) )
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write(*,*) 'latitudeOfLastGridPointInDegrees='
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X,latitudeOfLastPointInDegrees
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C get as a real8
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call grib_check( grib_get_real8(igrib
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X,'longitudeOfLastGridPointInDegrees'
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X,longitudeOfLastPointInDegrees) )
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write(*,*) 'longitudeOfLastGridPointInDegrees='
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X,longitudeOfLastPointInDegrees
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C get as a real8
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call grib_check( grib_get_real8(igrib
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X,'jDirectionIncrementInDegrees'
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X,jDirectionIncrementInDegrees) )
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write(*,*) 'jDirectionIncrementInDegrees='
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X,jDirectionIncrementInDegrees
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C get as a real8
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call grib_check( grib_get_real8(igrib
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X,'iDirectionIncrementInDegrees'
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X,iDirectionIncrementInDegrees) )
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write(*,*) 'iDirectionIncrementInDegrees='
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X,iDirectionIncrementInDegrees
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C get the size of the values array
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call grib_check(grib_get_size(igrib,'values',numberOfValues))
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write(*,*) 'numberOfValues=',numberOfValues
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C get data values
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call grib_check(grib_get_real8_array(igrib,'values',values,size))
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if ( size .ne. numberOfValues ) then
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write(*,*) 'ERROR: wrong numberOfValues'
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stop
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endif
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average = 0
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do i=1,numberOfValues
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average = average + values(i);
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enddo
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average =average / numberOfValues
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write(*,*)'There are ',numberOfValues
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X,' average is ',average
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call grib_check(grib_release(igrib))
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call grib_check(grib_close_file(ifile))
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end
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