<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>Lovish,</p>
<p>Where to start? Your ascii file appears to have 2642 pairs of
lat/lon. As Jennifer wrote, this would imply a GrADS binary file
of size 2642*4=10568. Your descriptor file on the other hand
implies 23550 pairs of lat/lon (150x157), and thus a GrADS binary
file of size 150*157*4=94200. Your attached GrADS binary file
matches neither of these; it's 151713 which is immediately
suspicious as it's not an even multiple of 4. <br>
</p>
<p>In addition you are likely trying to regrid these data somehow
(descriptor file has regular lat/lon's but the ascii file does
not). I suspect there are a few steps between test.dat and
test.grd, but with just the files all one can say is the binary
file is not correct, but of course you've already determined that.</p>
<p>Jim<br>
</p>
<br>
<div class="moz-cite-prefix">On 7/12/17 4:40 PM, Lovish Aggarwal
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CABj_cVeibMqTJybFpH2cGxiCxnbnBiZJ8_Z9Z4PC6vz-kLFufA@mail.gmail.com">
<div dir="ltr">
<div>Am sorry but I still am unable to find mistake in my grd
file.</div>
<div>Both the ascii data file with lat long and wind speed AND
the grid file produced by my java code are attached here,
please I request you to see and tell me where am I mistaken!</div>
<div>Thanks in advance!</div>
<div>Please reply asap.</div>
<div>Also attached are the ctl file and screenshot of output on
grads and command line.</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Jul 13, 2017 at 8:03 AM, Lovish
Aggarwal <span dir="ltr"><<a
href="mailto:guptaluv.8098@gmail.com" target="_blank"
moz-do-not-send="true">guptaluv.8098@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>Am sorry but I still am unable to find mistake in my
grd file.</div>
<div>Both the ascii data file with lat long and wind
speed AND the grid file produced by my java code are
attached here, please I request you to see and tell me
where am I mistaken!</div>
<div>Thanks in advance!</div>
<div>Please reply asap.</div>
</div>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Jul 13, 2017 at 2:58
AM, Jennifer M Adams <span dir="ltr"><<a
href="mailto:jadams21@gmu.edu" target="_blank"
moz-do-not-send="true">jadams21@gmu.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Sounds
like your .dat file is really ascii, if it has
columns with lat, lon, and wind speed data.<br>
<br>
The doc file I pointed to in my first reply does
tell you ‘exactly how your output grid file must
be written’ — look under the heading Structure of
a Gridded Binary File:<br>
<a
href="http://cola.gmu.edu/grads/gadoc/aboutgriddeddata.html#structure"
target="_blank" rel="noreferrer"
moz-do-not-send="true">http://cola.gmu.edu/grads/gado<wbr>c/aboutgriddeddata.html#struct<wbr>ure</a><br>
<br>
“… Each building block is a horizonal grid of data
varying in the X and Y dimensions. The first
dimension (X) always varies from west to east; the
second dimension (Y) varies from south to north
(by default).”<br>
<br>
So, you muse write all longitudes at the
southernmost latitude. Then write out another row
of data for all longidutes and the next latitude,
etc. You may find this page useful: <a
href="http://cola.gmu.edu/grads/gadoc/ascii.html"
target="_blank" rel="noreferrer"
moz-do-not-send="true">http://cola.gmu.edu/grads/gado<wbr>c/ascii.html</a>
— the section on “Input ASCII data” has an example
showing how to deal with ASCII data using GrADS
scripts.<br>
<span class="m_7094465726979005515HOEnZb"><font
color="#888888">—Jennifer<br>
</font></span>
<div class="m_7094465726979005515HOEnZb">
<div class="m_7094465726979005515h5"><br>
<br>
<br>
<br>
<br>
> On Jul 12, 2017, at 4:23 PM, Lovish
Aggarwal <<a
href="mailto:guptaluv.8098@gmail.com"
target="_blank" moz-do-not-send="true">guptaluv.8098@gmail.com</a>>
wrote:<br>
><br>
> This won't work as my dat file contains
three columns containing lat long and wind
speed. And grads is unable to read it.<br>
> The reason am trying to make a grid file
from it using java! Please help me up with how
exactly my output grid file must be written
for it to be understood by grads.<br>
> Thanks!<br>
><br>
> On Jul 12, 2017 5:54 PM, "Jennifer M
Adams" <<a href="mailto:jadams21@gmu.edu"
target="_blank" moz-do-not-send="true">jadams21@gmu.edu</a>>
wrote:<br>
> This doc page should provide the
information you need: <a
href="http://cola.gmu.edu/grads/gadoc/aboutgriddeddata.html"
target="_blank" rel="noreferrer"
moz-do-not-send="true">http://cola.gmu.edu/grads/gado<wbr>c/aboutgriddeddata.html</a><br>
><br>
> Flat binary data files often have the
.dat OR the .grd extension, so converting may
not be necessary. Depending on what your error
is, you can check the file's size, it should
be xsize*ysize*zsize*4 bytes.<br>
> —Jennifer<br>
><br>
><br>
> > On Jul 12, 2017, at 5:15 AM, Lovish
Aggarwal <<a
href="mailto:guptaluv.8098@gmail.com"
target="_blank" moz-do-not-send="true">guptaluv.8098@gmail.com</a>>
wrote:<br>
> ><br>
> > I need to know the exact format of
.grd file grads takes as input.<br>
> > I have .dat file with xyz (lat lon
windspeed) and am converting this .dat file to
.grd but there is a problem in reading the grd
file made.<br>
> > So I want to know the exact format
of grd file so that I can make it through my
java code.<br>
> > Thank you!<br>
> > It's kind of urgent please reply
asap.<br>
> > ______________________________<wbr>_________________<br>
> > gradsusr mailing list<br>
> > <a
href="mailto:gradsusr@gradsusr.org"
target="_blank" moz-do-not-send="true">gradsusr@gradsusr.org</a><br>
> > <a
href="http://gradsusr.org/mailman/listinfo/gradsusr"
target="_blank" rel="noreferrer"
moz-do-not-send="true">http://gradsusr.org/mailman/li<wbr>stinfo/gradsusr</a><br>
><br>
> --<br>
> Jennifer Miletta Adams<br>
> Center for Ocean-Land-Atmosphere Studies
(COLA)<br>
> George Mason University<br>
><br>
><br>
><br>
><br>
> ______________________________<wbr>_________________<br>
> gradsusr mailing list<br>
> <a href="mailto:gradsusr@gradsusr.org"
target="_blank" moz-do-not-send="true">gradsusr@gradsusr.org</a><br>
> <a
href="http://gradsusr.org/mailman/listinfo/gradsusr"
target="_blank" rel="noreferrer"
moz-do-not-send="true">http://gradsusr.org/mailman/li<wbr>stinfo/gradsusr</a><br>
> ______________________________<wbr>_________________<br>
> gradsusr mailing list<br>
> <a href="mailto:gradsusr@gradsusr.org"
target="_blank" moz-do-not-send="true">gradsusr@gradsusr.org</a><br>
> <a
href="http://gradsusr.org/mailman/listinfo/gradsusr"
target="_blank" rel="noreferrer"
moz-do-not-send="true">http://gradsusr.org/mailman/li<wbr>stinfo/gradsusr</a><br>
<br>
--<br>
Jennifer Miletta Adams<br>
Center for Ocean-Land-Atmosphere Studies
(COLA)<br>
George Mason University<br>
<br>
<br>
<br>
<br>
______________________________<wbr>_________________<br>
gradsusr mailing list<br>
<a href="mailto:gradsusr@gradsusr.org"
target="_blank" moz-do-not-send="true">gradsusr@gradsusr.org</a><br>
<a
href="http://gradsusr.org/mailman/listinfo/gradsusr"
target="_blank" rel="noreferrer"
moz-do-not-send="true">http://gradsusr.org/mailman/li<wbr>stinfo/gradsusr</a><br>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
gradsusr mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>
<a class="moz-txt-link-freetext" href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a>
</pre>
</blockquote>
<br>
</body>
</html>