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<p>Hello</p>
<p>Thanks for your answer.</p>
<p>I mean i have do downloaded precipitation data for 20 years in GES DISK and for half hour time interval and space resolution of 0.1 degree in netcdf format. now I need them in for instance 6 hour time interval and with resolution 1 km. How can i do it? please
guide and help me to do that if it is possible.</p>
<p>Best</p>
<p>Sadegh Dalfardi<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Latham, Robert J. <robl@mcs.anl.gov><br>
<b>Sent:</b> Thursday, August 12, 2021 3:13:14 AM<br>
<b>To:</b> parallel-netcdf@lists.mcs.anl.gov; Sadegh Dalfardi<br>
<b>Subject:</b> Re: question</font>
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<div class="PlainText">On Thu, 2021-08-12 at 12:35 +0000, Sadegh Dalfardi wrote:<br>
> I have a netcdf file and want to change the spatial and temporal<br>
> scale whithout changing and conversion to another format. I want to<br>
> know is it possible? If so please help or guide me cause i am a<br>
> beginner.<br>
<br>
I'm not 100% clear on what you're asking, so please follow up if I'm<br>
missing the mark.<br>
<br>
A NetCDF dataset (which parallel-netcdf and Unidata NetCDF both can<br>
read and write) is fairly rigid in its structure. If you have crated a<br>
few variables of a given dimension, the only way to change those<br>
variables and dimensions is to re-create the dataset.<br>
<br>
There are tools such as the "netcdf operators" (NCO) which make such<br>
manipulations easier, but if you have very large datasets it will take<br>
some time.<br>
<br>
If you have variables and you want them to grow over time then a<br>
"record variable" might suit your needs. A typical use case would be a<br>
sensor array that is logging the environment. Maybe the variable has<br>
dimenions for latitude and longidue for each sensor in the array and a<br>
third "UNLIMITED" dimension recoding the temperature every five<br>
minutes.<br>
<br>
==rob<br>
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