[gradsusr] Crop country boundary or masking an area - still not working

[Rafanoharana Serge Claudio]

Dear John,

Thank you for your answer. I do have ogr2ogr and a shapefile of the study
area. Thank you anyway for the file.
In your command, you only deal with .shp files, and ogr2ogr cannot be used
within GrADS.
The problem is that I have a .nc file which contains a variable. I want to
clip this .nc file (but not a .shp file). I am not sure that ogr2ogr can
deal with .nc format (I also tried but not working).

Thanks,

Serge


On Fri, Sep 9, 2011 at 1:09 PM, Huddleston, John <
Huddleston at cira.colostate.edu> wrote:

> Serge****
>
> ** **
>
> Attached is your study area shapefile (Study_Area.shp). Use ogr2ogr to clip
> your data.****
>
> ** **
>
> You can get ogr2ogr from http://www.gdal.org/ogr2ogr.html or if on Linux
> use ‘apt-get install gdal-bin’.****
>
> ** **
>
> Use the following command:****
>
> ** **
>
> ogr2ogr -clipsrc Study_Area.shp output.shp Your_input_data.shp****
>
> ** **
>
> where Study_Area.shp is a shapefile in the attached zip file and
> Your_input_data.shp is the shapefile you want to clip.****
>
> ** **
>
> John Huddleston, PhD****
>
> Cooperative Institute for Research in the Atmosphere****
>
> ** **
>
> ** **
>
> ** **
>
> *From:* gradsusr-bounces at gradsusr.org [mailto:
> gradsusr-bounces at gradsusr.org] *On Behalf Of *Rafanoharana Serge Claudio
> *Sent:* Friday, September 09, 2011 12:59 PM
> *To:* GrADS Users Forum
> *Subject:* [gradsusr] Crop country boundary or masking an area - still not
> working****
>
> ** **
>
> Dear all,
>
> I've already posted this message before but I can't get it worked.
> If any of you have any idea to crop the study area, please let me know. One
> said that it is possible to grab a shapefile of the top part  and fill it
> with black (I guess he meant re-setting the value of the variable covered by
> this shapefile to 0). If you have any experience or any tips on how to do
> that, thanks in advance for your help.
>
> Kind regards,
>
> Serge****
>
> ---------- Forwarded message ----------
> From: *Rafanoharana Serge Claudio* <rafanoharana at gmail.com>
> Date: Fri, Aug 26, 2011 at 7:53 AM
> Subject: Crop country boundary
> To: GrADS Users Forum <gradsusr at gradsusr.org>
>
>
> Dear all,
>
> I would like to ask if there is a way to crop the data to a specific area.
> In GrADS, if we use 'set mpdset hires', we have the country boundary.
> However for my case I only need the study area (please refer to the attached
> file).
>
> I found that http://www.diva-gis.org/datadown provides Grid data. Can we
> use the data from this Website to crop it or...?
>
> Thank you,
>
> --
> Serge ****
>
>
>
>
> --
> Serge****
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>
>


-- 
Serge
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20110910/2a873fa2/attachment-0003.html