Tabs Page |
---|
| Code Block |
---|
language | cpp |
---|
title | bufr_attributes.c |
---|
linenumbers | false |
---|
| /*
* Copyright 2005-2015 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_attributes
*
* Description: how to read attributes of keys in 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;
char* units= NULL;
char* unitsPercent= NULL;
long longVal;
double doubleVal;
size_t values_len=0, desc_len=0, len=0;
int i, err=0;
int cnt=0;
char* infile = "../../data/bufr/syno_multi.bufr";
in=fopen(infile,"r");
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);
/* ----------------------------------------------------------------
We will read the value and all the attributes available for
the 2m temperature.
-------------------------------------------------------------------*/
/* get the value as double */
CODES_CHECK(codes_get_double(h,"airTemperatureAt2M",&doubleVal),0);
printf(" airTemperatureAt2M: %.2f\n",doubleVal);
/* get the element's code (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->code",&longVal),0);
printf(" airTemperatureAt2M->code: %ld\n",longVal);
/* get the element's units (see BUFR code table B) */
/* get the size and allocate memory*/
CODES_CHECK(codes_get_length(h, "airTemperatureAt2M->units", &len), 0);
units = (char*)malloc(len*sizeof(char));
/* get the values*/
codes_get_string(h, "airTemperatureAt2M->units", units, &len);
printf(" airTemperatureAt2M->units: %s\n", units);
/* get the element's scale (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->scale",&longVal),0);
printf(" airTemperatureAt2M->scale: %ld\n",longVal);
/* get the element's reference (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->reference",&longVal),0);
printf(" airTemperatureAt2M->reference: %ld\n",longVal);
/* get the element's width (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->width",&longVal),0);
printf(" airTemperatureAt2M->width: %ld\n",longVal);
/* --------------------------------------------------------------------
The 2m temperature data element in this message has an associated
field: percentConfidence. Its value and attributes can be accessed
in a similar manner as was shown above for 2m temperature.
-------------------------------------------------------------------*/
/* get the value as long */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->percentConfidence",&longVal),0);
printf(" airTemperatureAt2M->percentConfidence: %ld\n",longVal);
/* get the element's code (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->percentConfidence->code",&longVal),0);
printf(" airTemperatureAt2M->percentConfidence->code: %ld\n",longVal);
/* get the element's units (see BUFR code table B) */
/* get the size and allocate memory*/
CODES_CHECK(codes_get_length(h, "airTemperatureAt2M->percentConfidence->units", &len), 0);
unitsPercent = (char*)malloc(len*sizeof(char));
/* get the values*/
codes_get_string(h, "airTemperatureAt2M->percentConfidence->units", unitsPercent, &len);
printf(" airTemperatureAt2M->percentConfidence->units: %s\n", unitsPercent);
/* get the element's scale (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->percentConfidence->scale",&longVal),0);
printf(" airTemperatureAt2M->percentConfidence->scale: %ld\n",longVal);
/* get the element's reference (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->percentConfidence->reference",&longVal),0);
printf(" airTemperatureAt2M->percentConfidence->reference: %ld\n",longVal);
/* get the element's width (see BUFR code table B) */
CODES_CHECK(codes_get_long(h,"airTemperatureAt2M->percentConfidence->width",&longVal),0);
printf(" airTemperatureAt2M->percentConfidence->width: %ld\n",longVal);
/* free allocated arrays */
free(units);
free(unitsPercent);
/* delete handle */
codes_handle_delete(h);
cnt++;
}
fclose(in);
return 0;
}
|
|
Tabs Page |
---|
| Code Block |
---|
language | none |
---|
title | bufr_attributes.f90 |
---|
linenumbers | false |
---|
| !
!Copyright 2005-2015 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.
!
!
! FOTRAN 90 Implementation: bufr_attributes
!
! Description: how to read attributes of keys in BUFR messages.
!
!
program bufr_attributes
use eccodes
implicit none
integer :: ifile
integer :: iret
integer :: ibufr
integer :: i, count=0
integer(kind=4) :: iVal,conf
real(kind=8) :: t2m
character(len=32) :: units, confUnits
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)
! 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);
! ----------------------------------------------------------------
! We will read the value and all the attributes available for
! the 2m temperature.
! ----------------------------------------------------------------
! get the element's value as as real
call codes_get(ibufr,'airTemperatureAt2M',t2m);
write(*,*) ' airTemperatureAt2M:',t2m
! get the element's code (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->code',iVal);
write(*,*) ' airTemperatureAt2M->code:',iVal
! get the element's units (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->units',units)
write(*,*) ' airTemperatureAt2M->units:',units
! get the element's scale (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->scale',iVal);
write(*,*) ' airTemperatureAt2M->code:',iVal
! get the element's reference (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->reference',iVal);
write(*,*) ' airTemperatureAt2M->reference:',iVal
! get the element's width (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->width',iVal);
write(*,*) ' airTemperatureAt2M->width:',iVal
! -------------------------------------------------------------------
! The 2m temperature data element in this message has an associated
! field: percentConfidence. Its value and attributes can be accessed
! in a similar manner as was shown above for 2m temperature.
! -------------------------------------------------------------------
! get the element's value as as real
call codes_get(ibufr,'airTemperatureAt2M->percentConfidence',conf);
write(*,*) ' airTemperatureAt2M->percentConfidence:', conf
! get the element's code (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->percentConfidence->code',iVal);
write(*,*) ' airTemperatureAt2M->percentConfidence->code:',iVal
! get the element's units (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->percentConfidence->units',confUnits)
write(*,*) ' airTemperatureAt2M->percentConfidence->units:',confUnits
! get the element's scale (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->percentConfidence->scale',iVal);
write(*,*) ' airTemperatureAt2M->percentConfidence->code:',iVal
! get the element's reference (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->percentConfidence->reference',iVal);
write(*,*) ' airTemperatureAt2M->percentConfidence->reference:',iVal
! get the element's width (see BUFR code table B)
call codes_get(ibufr,'airTemperatureAt2M->percentConfidence->width',iVal);
write(*,*) ' airTemperatureAt2M->percentConfidence->width:',iVal
! 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_attributes
|
|
Tabs Page |
---|
| Code Block |
---|
language | python |
---|
title | bufr_attributes.py |
---|
linenumbers | false |
---|
| # Copyright 2005-2015 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_attributes
#
# Description: how to read attributes of keys in BUFR messages.
#
#
import traceback
import sys
from eccodes import *
INPUT='../../data/bufr/syno_multi.bufr'
VERBOSE=1 # verbose error reporting
def example():
# open bufr file
f = open(INPUT)
cnt=0
# define the attributes to be printed (see BUFR code table B)
attrs = [
'code',
'units',
'scale',
'reference',
'width'
]
# loop for the messages in the file
while 1:
# get handle for message
gid = codes_bufr_new_from_file(f)
if gid 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(gid,'unpack',1)
#---------------------------------------------------------------
# We will read the value and all the attributes available for
# the 2m temperature.
#---------------------------------------------------------------
#get the value
key='airTemperatureAt2M'
iftry:
not codes_is_defined(gid,key):
print ' raise Exception("Key%s: "%s' +% (key + " was not defined")
,codes_get(gid,key))
except CodesInternalError,err:
print 'Error with key="%s" : %s' % (key,codes_get(gid,key))err.msg)
# print the values of the attributes of the key. Attributes themselves
# are keys as well. Their name is constructed like:
# keyname->attributename
for attr in attrs:
key='airTemperatureAt2M' + "->" + attr
iftry:
not codes_is_defined(gid,key):
print ' raise Exception("Key%s: "%s' +% (key + " was not defined"),codes_get(gid,key))
except CodesInternalError,err:
print 'Error with key="%s" : %s' % (key,codes_get(gid,key))err.msg)
#--------------------------------------------------------------------
# The 2m temperature data element in this message has an associated
# field: percentConfidence. Its value and attributes can be accessed
# in a similar manner as was shown above for 2m temperature.
#-------------------------------------------------------------------
#get the value
key='airTemperatureAt2M->percentConfidence'
iftry:
not codes_is_defined(gid,key):
print ' raise Exception("Key%s: "%s' + key + " was not defined")
% (key,codes_get(gid,key))
except CodesInternalError,err:
print 'Error with key="%s" : %s' % (key,codes_get(gid,key))
err.msg)
# print the values of the attributes of the key.
for attr in attrs:
key='airTemperatureAt2M->percentConfidence' + "->" + attr
try:
key='airTemperatureAt2M->percentConfidence' + "->" + attr
print ' %s: %s' if not % (key,codes_is_definedget(gid,key):)
raise Exception("Key: " + key + " was not defined")
except CodesInternalError,err:
print 'Error with key="%s" : %s' % (key,codes_get(gid,key))
err.msg)
cnt+=1
# delete handle
codes_release(gid)
# close the file
f.close()
def main():
try:
example()
except CodesInternalError,err:
if VERBOSE:
traceback.print_exc(file=sys.stderr)
else:
print >>sys.stderr,err.msg
return 1
if __name__ == "__main__":
sys.exit(main())
|
|
|