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language | none |
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title | bufr_get_keys.f90 |
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linenumbers | false |
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| !
!(C) Copyright 2005-2017 ECMWF.
!
! This software is licensed under the terms of the Apache Licence Version 2.0
!which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
!
! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
!
!
! FORTRAN 90 Implementation: bufr_get_keys
!
! Description: how to read values of different type of keys from BUFR messages.
!
!
program bufr_get_keys
use eccodes
implicit none
integer :: ifile
integer :: iret
integer :: ibufr
integer :: i, count=0
integer(kind=4) :: blockNumber,stationNumber
real(kind=8) :: t2m
integer(kind=4), dimension(:), allocatable :: descriptors
real(kind=8), dimension(:), allocatable :: values
character(len=9) :: typicalDate
call codes_open_file(ifile,'../../data/bufr/syno_multi.bufr','r')
! The first bufr message is loaded from file,
! ibufr is the bufr id to be used in subsequent calls
call codes_bufr_new_from_file(ifile,ibufr,iret)
do while (iret/=CODES_END_OF_FILE)
! For debugging
call codes_dump(ibufr)
! Get and print some keys form the BUFR header
write(*,*) 'message: ',count
! We need to instruct ecCodes to expand all the descriptors
! i.e. unpack the data values
call codes_set(ibufr,"unpack",1);
! Get as character
call codes_get(ibufr,'typicalDate',typicalDate)
write(*,*) ' typicalDate:',typicalDate
! Get as integer
call codes_get(ibufr,'blockNumber',blockNumber);
write(*,*) ' blockNumber:',blockNumber
! Get as integer
call codes_get(ibufr,'stationNumber',stationNumber);
write(*,*) ' stationNumber:',stationNumber
! get as real
call codes_get(ibufr,'airTemperatureAt2M',t2m);
write(*,*) ' airTemperatureAt2M:',t2m
! ---- array of integer ----------------
! get the expanded descriptors
call codes_get(ibufr,'bufrdcExpandedDescriptors',descriptors)
do i=1,size(descriptors)
write(*,*) ' ',i,descriptors(i)
enddo
! ---- array of real ----------------
! Get the expanded data values
call codes_get(ibufr,'numericValues',values)
do i=1,size(values)
write(*,*) ' ',i,values(i)
enddo
! Get as character
call codes_get(ibufr,'typicalDate',typicalDate)
write(*,*) ' typicalDate:',typicalDate
! Free arrays
deallocate(values)
deallocate(descriptors)
! Release the bufr message
call codes_release(ibufr)
! Load the next bufr message
call codes_bufr_new_from_file(ifile,ibufr,iret)
count=count+1
end do
! Close file
call codes_close_file(ifile)
end program bufr_get_keys
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language | python |
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title | bufr_get_keys.py |
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linenumbers | false |
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| # (C) Copyright 2005-2017 ECMWF.
#
# This software is licensed under the terms of the Apache Licence Version 2.0
# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
#
# In applying this licence, ECMWF does not waive the privileges and immunities
# granted to it by virtue of its status as an intergovernmental organisation
# nor does it submit to any jurisdiction.
#
# Python implementation: bufr_get_keys
#
# Description: how to read values of different type of keys from BUFR messages.
#
#
import tracebacksys
import systraceback
from eccodes import *
INPUT = '../../data/bufr/syno_multi.bufr'
VERBOSE = 1 # verbose error reporting
def example():
# open bufr file
f = open(INPUT, 'rb')
cnt = 0
# loop for the messages in the file
while 1:
# get handle for message
bufr = codes_bufr_new_from_file(f)
if bufr is None:
break
print ("message: %s" % cnt)
# we need to instruct ecCodes to expand all the descriptors
# i.e. unpack the data values
codes_set(bufr, 'unpack', 1)
# ---------------------------------------------
# get values for keys holding a single value
# ---------------------------------------------
# Native type integer
key = 'blockNumber'
try:
print (' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print ('Error with key="%s" : %s' % (key, err.msg))
# Native type integer
key = 'stationNumber'
try:
print (' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print ('Error with key="%s" : %s' % (key, err.msg))
# Native type float
key = 'airTemperatureAt2M'
try:
print (' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print ('Error with key="%s" : %s' % (key, err.msg))
# Native type string
key = 'typicalDate'
try:
print (' %s: %s' % (key, codes_get(bufr, key)))
except CodesInternalError as err:
print ('Error with key="%s" : %s' % (key, err.msg))
# --------------------------------
# get values for an array
# --------------------------------
# Native type integer
key = 'bufrdcExpandedDescriptors'
# get size
num = codes_get_size(bufr, key)
print (' size of %s is: %s' % (key, num))
# get values
values = codes_get_array(bufr, key)
for i in xrangerange(len(values)):
print (" %d %06d" % (i + 1, values[i]))
# Native type float
key = 'numericValues'
# get size
num = codes_get_size(bufr, key)
print (' size of %s is: %s' % (key, num))
# get values
values = codes_get_array(bufr, key)
for i in xrangerange(len(values)):
print (" %d %.10e" % (i + 1, values[i]))
cnt += 1
# delete handle
codes_release(bufr)
# close the file
f.close()
def main():
try:
example()
except CodesInternalError as err:
if VERBOSE:
traceback.print_exc(file=sys.stderr)
else:
sys.stderr.write(err.msg + '\n')
return 1
if __name__ == "__main__":
sys.exit(main())
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language | cpp |
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title | bufr_get_keys.c |
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linenumbers | false |
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| /*
* (C) Copyright 2005-2017 ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
*
* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
*/
/*
* C Implementation: bufr_get_keys
*
* Description: how to read values of different type of keys from BUFR messages.
*
*/
#include "eccodes.h"
int main(int argc,char* argv[])
{
FILE* in = NULL;
/* message handle. Required in all the eccodes calls acting on a message.*/
codes_handle* h=NULL;
long *descriptors=NULL;
double *values = NULL;
char* typicalDate= NULL;
long longVal;
double doubleVal;
size_t values_len=0, desc_len=0, len=0;
int i, err=0;
int cnt=0;
const char* infile = "../../data/bufr/syno_multi.bufr";
in=fopen(infile,"rrb");
if (!in) {
printf("ERROR: unable to open file %s\n", infile);
return 1;
}
/* loop over the messages in the bufr file */
while ((h = codes_handle_new_from_file(NULL, in, PRODUCT_BUFR, &err)) != NULL || err != CODES_SUCCESS)
{
if (h == NULL) {
printf("Error: unable to create handle for message %d\n",cnt);
cnt++;
continue;
}
printf("message: %d\n",cnt);
/* we need to instruct ecCodes to expand the descriptors
i.e. unpack the data values */
CODES_CHECK(codes_set_long(h, "unpack", 1),0);
/* read and print some data values */
/* long value */
CODES_CHECK(codes_get_long(h, "blockNumber", &longVal),0);
printf(" blockNumber: %ld\n", longVal);
/* long value */
CODES_CHECK(codes_get_long(h, "stationNumber", &longVal),0);
printf(" stationNumber: %ld\n", longVal);
/* double value */
CODES_CHECK(codes_get_double(h, "airTemperatureAt2M", &doubleVal),0);
printf(" airTemperatureAt2M: %f\n", doubleVal);
/* ---- string value -----------------*/
/* get the size and allocate memory*/
CODES_CHECK(codes_get_length(h, "typicalDate", &len), 0);
typicalDate = (char*)malloc(len*sizeof(char));
/* get the values*/
codes_get_string(h, "typicalDate", typicalDate, &len);
printf(" typicalDate: %s\n", typicalDate);
/* ---- array of long ----------------*/
/* get the size and allocate memory*/
CODES_CHECK(codes_get_size(h, "bufrdcExpandedDescriptors", &desc_len),0);
descriptors = (long*)malloc(desc_len*sizeof(long));
/* get the values */
CODES_CHECK(codes_get_long_array(h, "bufrdcExpandedDescriptors", descriptors, &desc_len),0);
printf(" bufrdcExpandedDescriptors:\n");
for(i = 0; i < desc_len; i++)
{
printf(" %ld\n",descriptors[i]);
}
/* ---- array of double ---------------*/
/* get the size and allocate memory*/
CODES_CHECK(codes_get_size(h, "numericValues", &values_len),0);
values = (double*)malloc(values_len*sizeof(double));
/* get the values*/
CODES_CHECK(codes_get_double_array(h, "numericValues", values, &values_len),0);
printf(" numericValues:\n");
for(i = 0; i < values_len; i++)
{
printf(" %.10e\n",values[i]);
}
/* free allocated arrays */
free(descriptors);
free(values);
free(typicalDate);
/* delete handle */
codes_handle_delete(h);
cnt++;
}
fclose(in);
return 0;
}
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