mirror of https://github.com/ecmwf/eccodes.git
78 lines
2.0 KiB
Fortran
Executable File
78 lines
2.0 KiB
Fortran
Executable File
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 Fortran Implementation: fieldset
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C
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C Description: how to use a fieldset.
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C
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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 nearest
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implicit none
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include 'grib_api_f77.h'
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integer err
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integer step
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integer nfiles
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integer i
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integer iset
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integer ig
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character*20 param
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integer len
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real*8 lats
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real*8 lons
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real*8 values
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real*8 distances
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integer indexes
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integer size
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real*8 lat,lon
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integer mode=0
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integer count
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character*200 filenames
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dimension filenames(5)
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integer in
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nfiles=argc-1;
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filenames=(char**)malloc(sizeof(char*)*nfiles);
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for (i=0;i<nfiles;i++)
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filenames[i]=(char*)strdup(argv[i+1]);
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set=grib_fieldset_new_from_files(0,filenames,nfiles,0,0,0,order_by,&err);
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GRIB_CHECK(err,0);
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printf("\nordering by %s\n",order_by);
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printf("\n%d fields in the fieldset\n",grib_fieldset_count(set));
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printf("n,step,param\n");
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mode=GRIB_NEAREST_SAME_GRID | GRIB_NEAREST_SAME_POINT;
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count=1;
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while ((h=grib_fieldset_next_handle(set,&err))!=NULL) {
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GRIB_CHECK(grib_get_long(h,"step",&step),0);
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GRIB_CHECK(grib_get_string(h,"param",param,&len),0);
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printf("%d %ld %s ",count,step,param);
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if (!nearest) nearest=grib_nearest_new(h,&err);
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GRIB_CHECK(err,0);
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GRIB_CHECK(grib_nearest_find(nearest,h,lat,lon,mode,lats,lons,values,distances,indexes,&size),0);
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for (i=0;i<4;i++) printf("%d %.2f %.2f %g %g - ",
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(int)indexes[i],lats[i],lons[i],distances[i],values[i]);
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printf("\n");
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grib_handle_delete(h);
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count++;
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}
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if (nearest) grib_nearest_delete(nearest);
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if (set) grib_fieldset_delete(set);
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return 0;
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}
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