mirror of https://github.com/ecmwf/eccodes.git
118 lines
4.2 KiB
Fortran
118 lines
4.2 KiB
Fortran
! (C) Copyright 2005- ECMWF.
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!
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! This software is licensed under the terms of the Apache Licence Version 2.0
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! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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!
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! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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!
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! Description: how to get values using keys.
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!
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!
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program get
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use eccodes
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implicit none
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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(kind=8) :: latitudeOfFirstPointInDegrees
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real(kind=8) :: longitudeOfFirstPointInDegrees
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real(kind=8) :: latitudeOfLastPointInDegrees
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real(kind=8) :: longitudeOfLastPointInDegrees
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real(kind=8) :: jDirectionIncrementInDegrees
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real(kind=8) :: iDirectionIncrementInDegrees
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integer(kind=4) :: numberOfPointsAlongAParallel
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integer(kind=4) :: numberOfPointsAlongAMeridian
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real(kind=8), dimension(:), allocatable :: values
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integer(kind=4) :: numberOfValues
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real(kind=8) :: average
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call codes_open_file(ifile, &
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'../../data/reduced_latlon_surface.grib1', 'r')
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! A new grib message is loaded from file
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! igrib is the grib id to be used in subsequent calls
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call codes_grib_new_from_file(ifile, igrib)
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! get as a integer
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call codes_get(igrib, 'numberOfPointsAlongAParallel', &
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numberOfPointsAlongAParallel)
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write (*, *) 'numberOfPointsAlongAParallel=', &
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numberOfPointsAlongAParallel
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! get as a integer
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call codes_get(igrib, 'numberOfPointsAlongAMeridian', &
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numberOfPointsAlongAMeridian)
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write (*, *) 'numberOfPointsAlongAMeridian=', &
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numberOfPointsAlongAMeridian
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! get as a real8
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call codes_get(igrib, &
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'latitudeOfFirstGridPointInDegrees', &
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latitudeOfFirstPointInDegrees)
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write (*, *) 'latitudeOfFirstGridPointInDegrees=', &
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latitudeOfFirstPointInDegrees
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! get as a real8
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call codes_get(igrib, &
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'longitudeOfFirstGridPointInDegrees', &
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longitudeOfFirstPointInDegrees)
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write (*, *) 'longitudeOfFirstGridPointInDegrees=', &
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longitudeOfFirstPointInDegrees
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! get as a real8
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call codes_get(igrib, &
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'latitudeOfLastGridPointInDegrees', &
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latitudeOfLastPointInDegrees)
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write (*, *) 'latitudeOfLastGridPointInDegrees=', &
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latitudeOfLastPointInDegrees
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! get as a real8
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call codes_get(igrib, &
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'longitudeOfLastGridPointInDegrees', &
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longitudeOfLastPointInDegrees)
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write (*, *) 'longitudeOfLastGridPointInDegrees=', &
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longitudeOfLastPointInDegrees
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! get as a real8
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call codes_get(igrib, &
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'jDirectionIncrementInDegrees', &
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jDirectionIncrementInDegrees)
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write (*, *) 'jDirectionIncrementInDegrees=', &
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jDirectionIncrementInDegrees
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! get as a real8
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call codes_get(igrib, &
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'iDirectionIncrementInDegrees', &
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iDirectionIncrementInDegrees)
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write (*, *) 'iDirectionIncrementInDegrees=', &
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iDirectionIncrementInDegrees
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! get the size of the values array
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call codes_get_size(igrib, 'values', numberOfValues)
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write (*, *) 'numberOfValues=', numberOfValues
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allocate (values(2*numberOfValues), stat=iret)
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! get data values
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print *, size(values)
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call codes_get(igrib, 'values', values)
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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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end do
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average = average/numberOfValues
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write (*, *) 'There are ', numberOfValues, &
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' average is ', average
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call codes_release(igrib)
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call codes_close_file(ifile)
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deallocate (values)
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end program get
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