splitting netcdf file into multiple files by date

• To: netcdfgroup@xxxxxxxxxxxxxxxx
• Subject: splitting netcdf file into multiple files by date
• From: Selina Satterfield <satterfields2000@xxxxxxxxx>
• Date: Mon, 11 Apr 2005 11:42:20 -0700 (PDT)

I'm new to netCDF development and currently I have a
large number of netcdf files
that contain multiple dimensions, variables , and data
for a period of time.  Here is a cdl that I generated
with ncdump of one of the files

netcdf test {
dimensions:
        lat = 141 ;
        lon = 360 ;
        time = UNLIMITED ; // (31 currently)
variables:
        float lat(lat) ;
                lat:long_name = "Latitude" ;
                lat:units = "degrees_north" ;
        float lon(lon) ;
                lon:long_name = "Longitude" ;
                lon:units = "degrees_east" ;
        float time(time) ;
                time:long_name = "Time" ;
                time:units = "hours since 1997-01-01" ;
        float age_rcnt_obs(time, lat, lon) ;
                age_rcnt_obs:_FillValue = 999.f ;
                age_rcnt_obs:long_name = "Age of Recent Observation"
;
                age_rcnt_obs:missing_value = 999.f ;
                age_rcnt_obs:units = "Hours" ;
                age_rcnt_obs:valid_max = 255.f ;
                age_rcnt_obs:valid_min = 0.f ;
        float anal_temp(time, lat, lon) ;
                anal_temp:_FillValue = 9999.f ;
                anal_temp:long_name = "Analysis Temperature" ;
                anal_temp:missing_value = 999.9f ;
                anal_temp:scale_factor = 0.1f ;
                anal_temp:units = "Deg. C" ;
                anal_temp:valid_max = 70.f ;
                anal_temp:valid_min = -10.f ;
        float avgrad(time, lat, lon) ;
                etc.....;

// global attributes:
                :title = "SST 100 KM FIELD" ;
data:

 lat = -70, -69, -68, -67, -66, -65, -64, -63, -62,
-61, -60, -59, -58, -57, 
    -56, -55, -54, -53, -52, -51, -50, -49, -48, -47,
-46, -45, -44, -43, 
    etc..............;

 lon = -180, -179, -178, -177, -176, -175, -174, -173,
-172, -171, -170, 
    -169, -168, -167, -166, -165, -164, -163, -162,
-161, -160, -159, -158, 
    -157, -156, -155, -154, -153, -152, -151, -150,
-149, -148, -147, -146, 
    -145, -144, -143, -142, -141, -140, -139, -138,
-137, -136, -135, -134, 
    etc..............;

 time = 60600, 60624, 60648, 60672, 60696, 60720,
60744, 60768, 60792, 60816, 
    60840, 60864, 60888, 60912, 60936, 60960, 60984,
61008, 61032, 61056, 
    61080, 61104, 61128, 61152, 61176, 61200, 61224,
61248, 61272, 61296, 
    61320 ;

 age_rcnt_obs
  .........etc

As you can see with the time there is data for 31
days. What I would like to do is create 31 separate
files using the NetCDF C++ Interface. Each file would
include all dimensions variables attributes and only
the data for that single day. I can't use a utility I
need to create this myself since dates and other
information needs to be obtained from a database. My
question is can anyone send a code example of how I
might do this? Thank you for your time and
consideration.

Selina




                
__________________________________ 
Do you Yahoo!? 
Make Yahoo! your home page 
http://www.yahoo.com/r/hs

• Follow-Ups:
  • Re: splitting netcdf file into multiple files by date
    • From: t . hume