00001 C Copyright 2005-2016 ECMWF
00002 C This software is licensed under the terms of the Apache Licence Version 2.0
00003 C which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
00004 C
00005 C In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
00006 C virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
00007 C
00008 C Fortran 77 Implementation: get_fortran
00009 C
00010 C Description: how to get values using keys.
00011 C
00012 C Author: Enrico Fucile
00013 C
00014 C
00015 C
00016 program get
00017 implicit none
00018 integer maxNumberOfValues
00019 parameter( maxNumberOfValues = 10000 )
00020 include 'grib_api_f77.h'
00021 integer ifile
00022 integer iret
00023 integer igrib
00024 integer i
00025 real*8 latitudeOfFirstPointInDegrees
00026 real*8 longitudeOfFirstPointInDegrees
00027 real*8 latitudeOfLastPointInDegrees
00028 real*8 longitudeOfLastPointInDegrees
00029 real*8 jDirectionIncrementInDegrees
00030 real*8 iDirectionIncrementInDegrees
00031 integer*4 numberOfPointsAlongAParallel
00032 integer*4 numberOfPointsAlongAMeridian
00033 real*8 values(maxNumberOfValues)
00034 integer*4 numberOfValues
00035 real*8 average
00036 character*256 error
00037 integer*4 size
00038
00039 size=maxNumberOfValues
00040 ifile=5
00041
00042 iret=grib_open_file(ifile
00043 X,'../../data/regular_latlon_surface.grib1','r')
00044 call grib_check(iret)
00045
00046 C a new grib message is loaded from file
00047 C igrib is the grib id to be used in subsequent calls
00048 call grib_check( grib_new_from_file(ifile,igrib) )
00049
00050 C get as a integer
00051 call grib_check(grib_get_int(igrib,'numberOfPointsAlongAParallel'
00052 X,numberOfPointsAlongAParallel) )
00053 write(*,*) 'numberOfPointsAlongAParallel='
00054 X,numberOfPointsAlongAParallel
00055
00056 C get as a integer
00057 call grib_check( grib_get_int(igrib,'numberOfPointsAlongAMeridian'
00058 X,numberOfPointsAlongAMeridian) )
00059 write(*,*) 'numberOfPointsAlongAMeridian='
00060 X,numberOfPointsAlongAMeridian
00061
00062 C get as a real8
00063 call grib_check( grib_get_real8(igrib
00064 X,'latitudeOfFirstGridPointInDegrees'
00065 X,latitudeOfFirstPointInDegrees) )
00066 write(*,*) 'latitudeOfFirstGridPointInDegrees='
00067 X,latitudeOfFirstPointInDegrees
00068
00069 C get as a real8
00070 call grib_check( grib_get_real8(igrib
00071 X,'longitudeOfFirstGridPointInDegrees'
00072 X,longitudeOfFirstPointInDegrees) )
00073 write(*,*) 'longitudeOfFirstGridPointInDegrees='
00074 X,longitudeOfFirstPointInDegrees
00075
00076 C get as a real8
00077 call grib_check( grib_get_real8(igrib
00078 X,'latitudeOfLastGridPointInDegrees'
00079 X,latitudeOfLastPointInDegrees) )
00080 write(*,*) 'latitudeOfLastGridPointInDegrees='
00081 X,latitudeOfLastPointInDegrees
00082
00083 C get as a real8
00084 call grib_check( grib_get_real8(igrib
00085 X,'longitudeOfLastGridPointInDegrees'
00086 X,longitudeOfLastPointInDegrees) )
00087 write(*,*) 'longitudeOfLastGridPointInDegrees='
00088 X,longitudeOfLastPointInDegrees
00089
00090 C get as a real8
00091 call grib_check( grib_get_real8(igrib
00092 X,'jDirectionIncrementInDegrees'
00093 X,jDirectionIncrementInDegrees) )
00094 write(*,*) 'jDirectionIncrementInDegrees='
00095 X,jDirectionIncrementInDegrees
00096
00097 C get as a real8
00098 call grib_check( grib_get_real8(igrib
00099 X,'iDirectionIncrementInDegrees'
00100 X,iDirectionIncrementInDegrees) )
00101 write(*,*) 'iDirectionIncrementInDegrees='
00102 X,iDirectionIncrementInDegrees
00103
00104 C get the size of the values array
00105 call grib_check(grib_get_size(igrib,'values',numberOfValues))
00106 write(*,*) 'numberOfValues=',numberOfValues
00107
00108 C get data values
00109 call grib_check(grib_get_real8_array(igrib,'values',values,size))
00110 if ( size .ne. numberOfValues ) then
00111 write(*,*) 'ERROR: wrong numberOfValues'
00112 stop
00113 endif
00114
00115 average = 0
00116 do i=1,numberOfValues
00117 average = average + values(i);
00118 enddo
00119
00120 average =average / numberOfValues
00121
00122 write(*,*)'There are ',numberOfValues
00123 X,' average is ',average
00124
00125 call grib_check(grib_release(igrib))
00126
00127 call grib_check(grib_close_file(ifile))
00128
00129 end
