[IDV #HHW-968552]: custom made gridded netCDF files for visualization by IDV

["Unidata IDV Support" <support-idv@xxxxxxxxxxxxxxxx>]

Hi Randy-

> We have generated a .nc file which contains one
> variable (liquid water) that we are trying to
> visualize in IDV. The dimension of the grid is
> 1250x1250x50. We get a exceeds maximum heap size
> (which we defined to be 3gig). The file is only 75mb
> but yet IDV seems to be using 3 gigabytes of memory
> before we get the error. We assume we are doing
> something wrong.

Can you send along the error stack that you are getting?
I get an error just trying to make the grid because for
every point in the domain, there are three 4 byte (float) values
(latitude, longitude and altitude) which ends up being over
900 mb (78125000*3*4) and my heap is only 1 Gb.  However, I suspect you
are getting bit further on down the line when the rendering
is occurring so it would be good to know where that is.  You
also have to add in 4*78125000 bytes for the values themselves.

If you subset the grid using the stride widget to take every
other or every third point, you should be able to create
an isosurface.

Also, what operating system are you running the IDV on and
what version are you running?

> Can you load it on your system? To access the file
> goto:
> 
> the files are called: AZ.000000000.nc and
> AZ.000000001.nc

Thanks for the samples.

Don

Ticket Details
===================
Ticket ID: HHW-968552
Department: Support IDV
Priority: Normal
Status: Open