[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

970627: netCDF question on getting variable dimensions

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: 970627: netCDF question on getting variable dimensions
  • Date: Fri, 27 Jun 97 10:53:41 -0600
Pavel,

>Date: Fri, 27 Jun 1997 20:17:20 +0400 
>From: Pavel Ivanov <address@hidden>
>Organization: MSU Phys dep. 
>To: Steve Emmerson <address@hidden>
>Subject: Re: 970627: netCDF question on 
>Keywords: 199706270943.DAA07480

In the above message, you wrote:

> Sorry but I dont use any library. I acsess data direct from netCDf file 
> and in file I see only one dimID specified in BNF form available from
> Unidata web site. How can i read it directly from file?

Sorry, I forgot that you're trying to read a netCDF file from Java.

Assuming that the BNF Web page you're referring to is

    http://www.unidata.ucar.edu/packages/netcdf/guidec/guidec-18.html#MARKER-9-
3236

then the relevant BNF entry is the following:

    var     := name  nelems  [dimid ...]  vatt_array  nc_type  vsize  begin

The notation "nelems [dimid ...]" means that "nelems" is a 32-bit
integer that specifies the number of dimension IDs in the subsequent
dimension ID vector "[dimid ...]".  The first dimension ID in "[dimid
...]" corresponds to the outer dimension of the variable.

If you're trying to read a netCDF file from Java, are you aware of the
following read-only Java interface?

    http://www.unidata.ucar.edu/packages/netcdf/software.html#Java interface

--------
Steve Emmerson   <http://www.unidata.ucar.edu>