Re: [netcdfgroup] NetCDF: Start+count exceeds dimension bound

• To: Ted Mansell <Ted.Mansell@xxxxxxxx>
• Subject: Re: [netcdfgroup] NetCDF: Start+count exceeds dimension bound
• From: XIAOBIN QIU <qiuxiaobin.tj@xxxxxxxxx>
• Date: Tue, 23 Nov 2010 10:39:43 -0600

Thanks a lot to everyone gives help. After reversing dimensions' order, the
error gone. I use fortran API, so 'start' is begin with 1, not like C from
0.

brick

On Tue, Nov 23, 2010 at 6:30 AM, Ted Mansell <Ted.Mansell@xxxxxxxx> wrote:

> The output from ncdump has the dimensions in "C" order, so in fortran you
> need to reverse the order:
>
> ALLOCATE(Reflectivity(nGate,nAzimuth)
>
> CALL nc_check ( nf90_get_var(ncid, 5, Reflectivity, start = (/ 1, 1 /),
> count = (/ nGate, nAzimuth /)) )
>
> Hope that helps.
>
> -- Ted
>
>
> On Nov 23, 2010, at 12:33 AM, brick wrote:
>
> > Hi
> >
> > When I read a nc file, there's an error: NetCDF: Start+count exceeds
> dimension bound.
> >
> > The data file is looked like:
> >
> > dimensions:
> >       Azimuth = 46 ;
> >       Gate = 1800 ;
> > variables:
> >       float Azimuth(Azimuth) ;
> >               Azimuth:Units = "Degrees" ;
> >       float BeamWidth(Azimuth) ;
> >               BeamWidth:Units = "Degrees" ;
> >       float GateWidth(Azimuth) ;
> >               GateWidth:Units = "Meters" ;
> >       float NyquistVelocity(Azimuth) ;
> >               NyquistVelocity:Units = "MetersPerSecond" ;
> >       float Reflectivity(Azimuth, Gate) ;
> >               Reflectivity:Units = "dBZ" ;
> >               Reflectivity:NumValidRuns = 25622 ;
> >
> > // global attributes:
> > ..............................
> >
> > The first four variables, dimensions and all attributes were read
> correctly. Only when read the fifth variable, Reflectivity(Azimuth, Gate),
>  the error occurred. At beginning, the code was wrote like:
> >
> > REAL   , ALLOCATABLE :: Reflectivity(:, :)
> > ALLOCATE(Reflectivity(nAzimuth, nGate), STAT = AlState)
> > CALL nc_check ( nf90_get_var(ncid, 5, Reflectivity) )
> >
> > nAzimuth, nGate are the dimensions read from data file. And then, it was
> modified as:
> >
> > CALL nc_check ( nf90_get_var(ncid, 5, Reflectivity, start = (/ 1, 1 /),
> count = (/ nAzimuth, nGate /)) )
> >
> > both of them don't work. Thanks.
> >
> > brick
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>

• References:
  • [netcdfgroup] NetCDF: Start+count exceeds dimension bound
    • From: brick