2013-04-02 14:02:10 +00:00
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< h1 > set_bitmap.f90< / h1 > How to set and use a bitmap.< 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" > set< / span > a bitmap in a grib message
< a name = "l00010" > < / a > 00010 !
< a name = "l00011" > < / a > 00011 !
< a name = "l00012" > < / a > 00012 ! Author: Enrico Fucile
< a name = "l00013" > < / a > 00013 !
< a name = "l00014" > < / a > 00014 !
< a name = "l00015" > < / a > 00015 program set_bitmap
< a name = "l00016" > < / a > 00016 use grib_api
< a name = "l00017" > < / a > 00017 implicit none
< a name = "l00018" > < / a > 00018 integer :: infile,outfile
< a name = "l00019" > < / a > 00019 integer :: igrib, iret
< a name = "l00020" > < / a > 00020 integer :: numberOfValues
< a name = "l00021" > < / a > 00021 real, dimension(:), allocatable :: values
< a name = "l00022" > < / a > 00022 real :: missingValue
< a name = "l00023" > < / a > 00023 logical :: grib1Example
< a name = "l00024" > < / a > 00024
< a name = "l00025" > < / a > 00025 grib1Example=.true.
< a name = "l00026" > < / a > 00026
< a name = "l00027" > < / a > 00027 < span class = "keywordflow" > if< / span > (grib1Example) then
< a name = "l00028" > < / a > 00028 ! GRIB 1 example
< a name = "l00029" > < / a > 00029 call grib_open_file(infile,'../../data/regular_latlon_surface.grib1< span class = "charliteral" > ','< / span > r')
< a name = "l00030" > < / a > 00030 else
< a name = "l00031" > < / a > 00031 ! GRIB 2 example
< a name = "l00032" > < / a > 00032 call grib_open_file(infile,'../../data/regular_latlon_surface.grib2','r')
< a name = "l00033" > < / a > 00033 end if
< a name = "l00034" > < / a > 00034
< a name = "l00035" > < / a > 00035 call grib_open_file(outfile,'out.grib','w')
< a name = "l00036" > < / a > 00036
< a name = "l00037" > < / a > 00037 ! a new 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(infile,igrib)
< a name = "l00040" > < / a > 00040
< a name = "l00041" > < / a > 00041 ! The missingValue is not coded in the message.
< a name = "l00042" > < / a > 00042 ! It is a value we define as a placeholder for a missing value
< a name = "l00043" > < / a > 00043 ! in a point of the grid.
< a name = "l00044" > < / a > 00044 ! It should be choosen in a way that it cannot be confused
< a name = "l00045" > < / a > 00045 ! with a valid field value
< a name = "l00046" > < / a > 00046 missingValue=9999
< a name = "l00047" > < / a > 00047 call grib_set(igrib, 'missingValue',missingValue)
< a name = "l00048" > < / a > 00048 write(*,*) 'missingValue=',missingValue
< a name = "l00049" > < / a > 00049
< a name = "l00050" > < / a > 00050 ! get the size of the values array
< a name = "l00051" > < / a > 00051 call < a name = "a0" > < / 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 = "l00052" > < / a > 00052 write(*,*) 'numberOfValues=',numberOfValues
< a name = "l00053" > < / a > 00053
< a name = "l00054" > < / a > 00054 allocate(values(numberOfValues), stat=iret)
< a name = "l00055" > < / a > 00055
< a name = "l00056" > < / a > 00056 ! get data values
< a name = "l00057" > < / a > 00057 call grib_get(igrib,'values',values)
< a name = "l00058" > < / a > 00058
< a name = "l00059" > < / a > 00059 ! enable bitmap
< a name = "l00060" > < / a > 00060 call grib_set(igrib,"bitmapPresent",1)
< a name = "l00061" > < / a > 00061
< a name = "l00062" > < / a > 00062 ! some values are missing
< a name = "l00063" > < / a > 00063 values(1:10) = missingValue
< a name = "l00064" > < / a > 00064
< a name = "l00065" > < / a > 00065 ! set the values (the bitmap will be automatically built)
< a name = "l00066" > < / a > 00066 call grib_set(igrib,'values', values)
< a name = "l00067" > < / a > 00067
< a name = "l00068" > < / a > 00068 ! write modified message to a file
< a name = "l00069" > < / a > 00069 call grib_write(igrib,outfile)
< a name = "l00070" > < / a > 00070
< a name = "l00071" > < / a > 00071 ! FREE MEMORY
< a name = "l00072" > < / a > 00072 call grib_release(igrib)
< a name = "l00073" > < / a > 00073
< a name = "l00074" > < / a > 00074 call grib_close_file(infile)
< a name = "l00075" > < / a > 00075
< a name = "l00076" > < / a > 00076 call grib_close_file(outfile)
< a name = "l00077" > < / a > 00077
< a name = "l00078" > < / a > 00078 deallocate(values)
< a name = "l00079" > < / a > 00079
< a name = "l00080" > < / a > 00080 end program set_bitmap
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