Dear John,<br><br>Thank you for your answer. I do have ogr2ogr and a shapefile of the study area. Thank you anyway for the file.<br>In your command, you only deal with .shp files, and ogr2ogr cannot be used within GrADS.<br>
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).<br><br>Thanks,<br><br>
Serge<br><br><br><div class="gmail_quote">On Fri, Sep 9, 2011 at 1:09 PM, Huddleston, John <span dir="ltr"><<a href="mailto:Huddleston@cira.colostate.edu">Huddleston@cira.colostate.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Serge<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Attached is your study area shapefile (Study_Area.shp). Use ogr2ogr to clip your data.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">You can get ogr2ogr from <a href="http://www.gdal.org/ogr2ogr.html" target="_blank">http://www.gdal.org/ogr2ogr.html</a> or if on Linux use ‘apt-get install gdal-bin’.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Use the following command:<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">ogr2ogr -clipsrc Study_Area.shp output.shp Your_input_data.shp<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">where Study_Area.shp is a shapefile in the attached zip file and Your_input_data.shp is the shapefile you want to clip.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">John Huddleston, PhD<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;color:#1F497D">Cooperative Institute for Research in the Atmosphere<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt"> <a href="mailto:gradsusr-bounces@gradsusr.org" target="_blank">gradsusr-bounces@gradsusr.org</a> [mailto:<a href="mailto:gradsusr-bounces@gradsusr.org" target="_blank">gradsusr-bounces@gradsusr.org</a>] <b>On Behalf Of </b>Rafanoharana Serge Claudio<br>
<b>Sent:</b> Friday, September 09, 2011 12:59 PM<br><b>To:</b> GrADS Users Forum<br><b>Subject:</b> [gradsusr] Crop country boundary or masking an area - still not working<u></u><u></u></span></p><div><div></div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal" style="margin-bottom:12.0pt">Dear all,<br><br>I've already posted this message before but I can't get it worked.<br>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.<br>
<br>Kind regards,<br><br>Serge<u></u><u></u></p><div><p class="MsoNormal">---------- Forwarded message ----------<br>From: <b>Rafanoharana Serge Claudio</b> <<a href="mailto:rafanoharana@gmail.com" target="_blank">rafanoharana@gmail.com</a>><br>
Date: Fri, Aug 26, 2011 at 7:53 AM<br>Subject: Crop country boundary<br>To: GrADS Users Forum <<a href="mailto:gradsusr@gradsusr.org" target="_blank">gradsusr@gradsusr.org</a>><br><br><br>Dear all,<br><br>I would like to ask if there is a way to crop the data to a specific area.<br>
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).<br><br>I found that <a href="http://www.diva-gis.org/datadown" target="_blank">http://www.diva-gis.org/datadown</a> provides Grid data. Can we use the data from this Website to crop it or...?<br>
<br>Thank you,<br clear="all"><br>-- <br><span style="color:#888888">Serge </span><u></u><u></u></p></div><p class="MsoNormal"><br><br clear="all"><br>-- <br>Serge<u></u><u></u></p></div></div></div></div><br>_______________________________________________<br>
gradsusr mailing list<br>
<a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>
<a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Serge<br>