2013-04-02 14:02:10 +00:00
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< h1 > get.f90< / h1 > How to get values through the key names.< p >
2015-01-05 15:45:46 +00:00
< div class = "fragment" > < pre class = "fragment" > < a name = "l00001" > < / a > 00001 ! Copyright 2005-2015 ECMWF
2013-04-02 14:02:10 +00:00
< a name = "l00002" > < / a > 00002 ! This software is licensed under the terms of the Apache Licence Version 2.0
< a name = "l00003" > < / a > 00003 ! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
< a name = "l00004" > < / a > 00004 !
< a name = "l00005" > < / a > 00005 ! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
< a name = "l00006" > < / a > 00006 ! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
< a name = "l00007" > < / a > 00007 !
< a name = "l00008" > < / a > 00008 !
< a name = "l00009" > < / a > 00009 ! Description: how to < span class = "keyword" > get< / span > values < span class = "keyword" > using< / span > keys.
< a name = "l00010" > < / a > 00010 !
< a name = "l00011" > < / a > 00011 ! Author: Enrico Fucile
< a name = "l00012" > < / a > 00012 !
< a name = "l00013" > < / a > 00013 !
< a name = "l00014" > < / a > 00014 program < span class = "keyword" > get< / span >
< a name = "l00015" > < / a > 00015 use grib_api
< a name = "l00016" > < / a > 00016 implicit none
< a name = "l00017" > < / a > 00017
< a name = "l00018" > < / a > 00018 integer :: ifile
< a name = "l00019" > < / a > 00019 integer :: iret
< a name = "l00020" > < / a > 00020 integer :: igrib
< a name = "l00021" > < / a > 00021 real :: latitudeOfFirstPointInDegrees
< a name = "l00022" > < / a > 00022 real :: longitudeOfFirstPointInDegrees
< a name = "l00023" > < / a > 00023 real :: latitudeOfLastPointInDegrees
< a name = "l00024" > < / a > 00024 real :: longitudeOfLastPointInDegrees
< a name = "l00025" > < / a > 00025 integer :: numberOfPointsAlongAParallel
< a name = "l00026" > < / a > 00026 integer :: numberOfPointsAlongAMeridian
< a name = "l00027" > < / a > 00027 real, dimension(:), allocatable :: values
< a name = "l00028" > < / a > 00028 integer :: numberOfValues
< a name = "l00029" > < / a > 00029 real :: average,min_val, max_val
< a name = "l00030" > < / a > 00030 integer :: is_missing
< a name = "l00031" > < / a > 00031
< a name = "l00032" > < / a > 00032 call grib_open_file(ifile, &
< a name = "l00033" > < / a > 00033 '../../data/reduced_latlon_surface.grib1< span class = "charliteral" > ','< / span > r')
< a name = "l00034" > < / a > 00034
< a name = "l00035" > < / a > 00035 ! Loop on all the messages in a file.
< a name = "l00036" > < / a > 00036
< a name = "l00037" > < / a > 00037 ! a < span class = "keyword" > new< / span > grib message is loaded from file
< a name = "l00038" > < / a > 00038 ! igrib is the grib < span class = "keywordtype" > id< / span > to be used in subsequent calls
< a name = "l00039" > < / a > 00039 call grib_new_from_file(ifile,igrib, iret)
< a name = "l00040" > < / a > 00040
< a name = "l00041" > < / a > 00041 LOOP: DO WHILE (iret /= < a name = "a0" > < / a > < a class = "code" href = "grib__api_8h.html#3bd3d72fe8bc116ca08c2d4b99203768" title = "End of ressource reached." > GRIB_END_OF_FILE< / a > )
< a name = "l00042" > < / a > 00042
< a name = "l00043" > < / a > 00043 !check if the value of the key is MISSING
< a name = "l00044" > < / a > 00044 is_missing=0;
< a name = "l00045" > < / a > 00045 call grib_is_missing(igrib,'numberOfPointsAlongAParallel', &
< a name = "l00046" > < / a > 00046 is_missing);
< a name = "l00047" > < / a > 00047 if ( is_missing /= 1 ) then
< a name = "l00048" > < / a > 00048 ! get as a integer
< a name = "l00049" > < / a > 00049 call grib_get(igrib,'numberOfPointsAlongAParallel', &
< a name = "l00050" > < / a > 00050 numberOfPointsAlongAParallel)
< a name = "l00051" > < / a > 00051 write(*,*) 'numberOfPointsAlongAParallel=', &
< a name = "l00052" > < / a > 00052 numberOfPointsAlongAParallel
< a name = "l00053" > < / a > 00053 else
< a name = "l00054" > < / a > 00054 write(*,*) 'numberOfPointsAlongAParallel is missing'
< a name = "l00055" > < / a > 00055 endif
< a name = "l00056" > < / a > 00056 ! get as a integer
< a name = "l00057" > < / a > 00057 call grib_get(igrib,'numberOfPointsAlongAMeridian', &
< a name = "l00058" > < / a > 00058 numberOfPointsAlongAMeridian)
< a name = "l00059" > < / a > 00059 write(*,*) 'numberOfPointsAlongAMeridian=', &
< a name = "l00060" > < / a > 00060 numberOfPointsAlongAMeridian
< a name = "l00061" > < / a > 00061
< a name = "l00062" > < / a > 00062 ! get as a real
< a name = "l00063" > < / a > 00063 call grib_get(igrib, 'latitudeOfFirstGridPointInDegrees', &
< a name = "l00064" > < / a > 00064 latitudeOfFirstPointInDegrees)
< a name = "l00065" > < / a > 00065 write(*,*) 'latitudeOfFirstGridPointInDegrees=', &
< a name = "l00066" > < / a > 00066 latitudeOfFirstPointInDegrees
< a name = "l00067" > < / a > 00067
< a name = "l00068" > < / a > 00068 ! get as a real
< a name = "l00069" > < / a > 00069 call grib_get(igrib, 'longitudeOfFirstGridPointInDegrees', &
< a name = "l00070" > < / a > 00070 longitudeOfFirstPointInDegrees)
< a name = "l00071" > < / a > 00071 write(*,*) 'longitudeOfFirstGridPointInDegrees=', &
< a name = "l00072" > < / a > 00072 longitudeOfFirstPointInDegrees
< a name = "l00073" > < / a > 00073
< a name = "l00074" > < / a > 00074 ! get as a real
< a name = "l00075" > < / a > 00075 call grib_get(igrib, 'latitudeOfLastGridPointInDegrees', &
< a name = "l00076" > < / a > 00076 latitudeOfLastPointInDegrees)
< a name = "l00077" > < / a > 00077 write(*,*) 'latitudeOfLastGridPointInDegrees=', &
< a name = "l00078" > < / a > 00078 latitudeOfLastPointInDegrees
< a name = "l00079" > < / a > 00079
< a name = "l00080" > < / a > 00080 ! get as a real
< a name = "l00081" > < / a > 00081 call grib_get(igrib, 'longitudeOfLastGridPointInDegrees', &
< a name = "l00082" > < / a > 00082 longitudeOfLastPointInDegrees)
< a name = "l00083" > < / a > 00083 write(*,*) 'longitudeOfLastGridPointInDegrees=', &
< a name = "l00084" > < / a > 00084 longitudeOfLastPointInDegrees
< a name = "l00085" > < / a > 00085
< a name = "l00086" > < / a > 00086
< a name = "l00087" > < / a > 00087 ! get the size of the values array
< a name = "l00088" > < / a > 00088 call < a name = "a1" > < / a > < a class = "code" href = "group__get__set.html#g18b622ed86b24d5e5fcab70c309fc245" title = "Get the number of coded value from a key, if several keys of the same name are present..." > grib_get_size< / a > (igrib,'values',numberOfValues)
< a name = "l00089" > < / a > 00089 write(*,*) 'numberOfValues=',numberOfValues
< a name = "l00090" > < / a > 00090
< a name = "l00091" > < / a > 00091 allocate(values(numberOfValues), stat=iret)
< a name = "l00092" > < / a > 00092 ! get data values
< a name = "l00093" > < / a > 00093 call grib_get(igrib,'values',values)
< a name = "l00094" > < / a > 00094 call grib_get(igrib,'min',min_val) ! can also be obtained through minval(values)
< a name = "l00095" > < / a > 00095 call grib_get(igrib,'max',max_val) ! can also be obtained through maxval(values)
< a name = "l00096" > < / a > 00096 call grib_get(igrib,'average',average) ! can also be obtained through maxval(values)
< a name = "l00097" > < / a > 00097
< a name = "l00098" > < / a > 00098 write(*,*)'There are ',numberOfValues, &
< a name = "l00099" > < / a > 00099 ' average is ',average, &
< a name = "l00100" > < / a > 00100 ' min is ', min_val, &
< a name = "l00101" > < / a > 00101 ' max is ', max_val
< a name = "l00102" > < / a > 00102
< a name = "l00103" > < / a > 00103 call grib_release(igrib)
< a name = "l00104" > < / a > 00104
< a name = "l00105" > < / a > 00105 call grib_new_from_file(ifile,igrib, iret)
< a name = "l00106" > < / a > 00106
< a name = "l00107" > < / a > 00107 end do LOOP
< a name = "l00108" > < / a > 00108
< a name = "l00109" > < / a > 00109 call grib_close_file(ifile)
< a name = "l00110" > < / a > 00110
< a name = "l00111" > < / a > 00111 deallocate(values)
< a name = "l00112" > < / a > 00112 end program get
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