Dear Mr.Jean,<br> Last six months I was trying to plot MODIS data in Grads. Today I succeeded with the help of grads user group and some of my friends. There is two ways to plot the MODIS HDF data.<br>1) Firstly convert the hdf data into ascii form using any software such as ENVI, HDF explorer, etc.
<br>2) Using the ascii code we are able to know the latitude, longitude and the parameter at different heights. <br>3) Construct a fortran program which will convert this data into station format and I have also written a c program which will convert the out put of fortran into station data format.
<br>4) Now write a ctl file for the station data<br>5) Run the station map utility using the command stnmap -i stnexample.ctl<br>6)open the ctl file in grads<br>7)plot the data. Now set gxout stnmark<br>8) then set cmark 11( or something)
<br> set digsiz 0.14<br> now display and it will give the values in the data points as markers. This is a quite good approach because we are not doing any interpolation techniques. Just the pure data.<br><br>There is another way also. We can directly plot the hdf files in grads. For that we have to write a Data descriptor file. That I am trying now. Yet not succeeded. If you succeeded first, please let me know.
<br> If you want the program or ctl files that I have used dont hesitate to ask me.<br>sincerely<br><br><br><br><div class="gmail_quote">On Nov 30, 2007 9:55 PM, Jean Pierre Arabonis <<a href="mailto:arabonis@egs.uct.ac.za">
arabonis@egs.uct.ac.za</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">
I tried using grads for the modis data some years ago with no success,
I ended up using Envi - interestingly if you re-save the data as hdf in
Envi then you can open it with grads. I suspect is is some
incompatibility with the file format.<br>
Please let me know if you do find a solution<br>
Good Luck<br>
JP<div><div></div><div class="Wj3C7c"><br>
<br>
<br>
Jayakrishnan PR wrote:
<blockquote type="cite">
<pre>On Fri, 25 Apr 2003 11:28:34 -0000, Pawan Gupta <a href="mailto:pawanpgupta@REDIFFMAIL.COM" target="_blank"><pawanpgupta@REDIFFMAIL.COM></a>
wrote:
</pre>
<blockquote type="cite">
<pre>Dear Friends
Can you help me in displaying MODIS HDF format
Thanks
pawan
*******************************************************************
Pawan Gupta
Junior Research Fellow
Oceanography Division,
National Remote Sensing Agency,
DOS,Balanagar, Hyderabad-38 ,India
Phone 91-040-3884245
<a href="mailto:Email:pawanpgupta@rediffmail.com" target="_blank">Email:pawanpgupta@rediffmail.com</a>
Homepage: <a href="http://www.geocities.com/pawanpgupta/pawanhp.html" target="_blank">http://www.geocities.com/pawanpgupta/pawanhp.html</a>
********************************************************************
</pre>
</blockquote>
<pre>Dear Pawan,
I also now facing the same problem to analyse MODIS data in hdf format
using grads. If you got the solution, kindly help me.
Jayakrishnan.P.R
Junior Research Fellow,
Department of atmospheric Sciences,
CUSAT, Cochin-16, India
</pre>
</blockquote>
<br>
<br>
</div></div><pre cols="72">--
Jean Pierre Arabonis
<a href="mailto:arabonis@egs.uct.ac.za" target="_blank">arabonis@egs.uct.ac.za</a>
Tel 021 780 1021 cell 084 401 1365
This email is 100% Microsoft Free
</pre>
</div>
</blockquote></div><br><br clear="all"><br>-- <br>***********************************************<br>Jayakrishnan.P.R<br>Junior Research Fellow<br>Department of Atmospheric Sciences<br>Cochin University of Science And Technology (CUSAT), Cochin-16
<br>Kerala, India.<br>Mob: 09895417565<br><br>***********************************************