[gradsusr] Hello everyone, Question about NCEP reanalysis??? (avi kojokro)

[Andrew Friedman]

Hi Bimal,
You should be able to do this using the maskout and const functions. Check
out the example here: http://cola.gmu.edu/grads/gadoc/gradfuncmaskout.html
-Andrew

On Fri, Jan 6, 2017 at 8:05 PM, Bimal Gyawali <bml.gya at gmail.com> wrote:

> Hello All,
> Can I calculate area Of a rectangular box but area of land only using
> grads? IN ATTACHED figure i would like to calculate area of the red box but
> wanna calculate only area of land not ocean.
> Please help me with this if it is possible.
> THank you.
>
>
>
> [image: Inline image 1]
>
> *Bimal Gyawali*
>
>
>
>
>
> * Graduate Research Assistant Department of Physical and Environment
> Science Natural Resources Center Texas A&M University-Corpus Christi Corpus
> Christi, TX 78412 Tel: 435-881-3603 <(435)%20881-3603>*
>
> On Fri, Jan 6, 2017 at 11:08 AM, Hoop <hoop at colorado.edu> wrote:
>
>> All,
>>
>> I've been fighting this one for a while.  The problem is that, as U.S.
>> Government site, we had to switch to the https protocol.  Redirects
>> are being given by the server, but some versions of GrADS handle them
>> and some don't.  The latest version of COLA GrADS works fine.  So,
>> either update your GrADS or change the protocol to https on all URLs
>> for the host www.esrl.noaa.gov.
>>
>> -Hoop
>>
>> On 01/06/2017 10:00 AM, gradsusr-request at gradsusr.org wrote:
>>
>> > Date: Fri, 6 Jan 2017 11:01:18 +0200
>> > From: avi kojokro <kojokroavi at gmail.com>
>> > Subject: [gradsusr] Hello everyone, Question about NCEP reanalysis???
>> > To: ????? <gradsusr at gradsusr.org>
>> > Message-ID:
>> >       <CAFCfe=M1+D_UPz-dPEK2JNg_t=4gK2Aw8+VmrJqbB08fMQVsOQ at mail.g
>> mail.com>
>> > Content-Type: text/plain; charset="utf-8"
>> >
>> > I'm trying to get data through this server on Grads:
>> >
>> > http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.rea
>> nalysis.derived/pressure/air.mon.mean.nc
>> >
>> > and this server :
>> >
>> > http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.rea
>> nalysis.derived/pressure/hgt.mon.mean.nc
>> >
>> >
>> > and this server :
>> >
>> > http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.rea
>> nalysis.derived/surface/slp.mon.mean.nc
>> >
>> >
>> >
>> > And I get this error on Three servers:
>> >
>> > Can anyone tell me why I'm getting these errors?
>> >
>> > ga-> 0AV11
>> > No hardcopy metafile open
>> > All files closed; all defined objects released;
>> > All GrADS attributes have been reinitialized
>> > curl error details:
>> > Error: nc_open failed to open file
>> > http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.rea
>> nalysis.derived/pressure/air.mon.mean.nc
>> > NetCDF: I/O failure
>> > gadsdf: Couldn't ingest SDF metadata.
>> > SET Error:  No files open yet
>> > SET Error:  No files open yet
>> > SET Error:  No files open yet
>> > No Files Open
>> >  No Files Open
>> >
>> > SET Error:  No files open yet
>> > DISPLAY error:  no file open yet
>> >  T500DISPLAY error:  no file open yet
>> >
>> >
>> > No hardcopy metafile open
>> > All files closed; all defined objects released;
>> > All GrADS attributes have been reinitialized
>> > curl error details:
>> > Error: nc_open failed to open file
>> > http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.rea
>> nalysis.derived/pressure/hgt.mon.mean.nc
>> > NetCDF: I/O failure
>> > gadsdf: Couldn't ingest SDF metadata.
>> > SET Error:  No files open yet
>> > SET Error:  No files open yet
>> > SET Error:  No files open yet
>> > No Files Open
>> >  No Files Open
>> >
>> > SET Error:  No files open yet
>> > DISPLAY error:  no file open yet
>> >  H500DISPLAY error:  no file open yet
>> >
>> >
>> > No hardcopy metafile open
>> > All files closed; all defined objects released;
>> > All GrADS attributes have been reinitialized
>> > curl error details:
>> > Error: nc_open failed to open file
>> > http://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.rea
>> nalysis.derived/surface/slp.mon.mean.nc
>> > NetCDF: I/O failure
>> > gadsdf: Couldn't ingest SDF metadata.
>> > SET Error:  No files open yet
>> > SET Error:  No files open yet
>> > SET Error:  No files open yet
>> > No Files Open
>> >  No Files Open
>> >
>> > SET Error:  No files open yet
>> > DISPLAY error:  no file open yet
>> >  SLPDISPLAY error:  no file open yet
>> >
>> >
>> > Thanks
>> >
>> > Avi.
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