[ncl-talk] Killed problem

[Will Hobbs]

Hi Vanucia

I’ve come across similar problems with data that has significant  spatial discontinuities (e.g. very strong local fronts/gradients). The contour plotting algorithm is forced to apply too many contours and leads to the script being killed without a particularly useful error message.

You can test if this is the case with your data by setting the cnFillMode resource to “RasterFill”, and then the contour algorithm isn’t invokes and it should plot fine. Obviously there is no way of using Raster Fill for contour lines, so you must set the resource cnLinesOn to False

Will

From: ncl-talk <ncl-talk-bounces at ucar.edu> on behalf of Rick Brownrigg <brownrig at ucar.edu>
Date: Saturday, 16 March 2019 at 6:33 AM
To: Vanúcia Schumacher <vanucia-schumacher at hotmail.com>
Cc: "ncl-talk at ucar.edu" <ncl-talk at ucar.edu>
Subject: Re: [ncl-talk] Killed problem

Yes, a cryptic "killed" message on a linux machine actually comes from the OS, and is indicative of extreme memory stress on the machine. I'm not sure of what to suggest as a work-around without know more what you need to do, what the data look like, etc.

Goiod luck!
Rick

On Fri, Mar 15, 2019 at 12:39 PM Vanúcia Schumacher <vanucia-schumacher at hotmail.com<mailto:vanucia-schumacher at hotmail.com>> wrote:
Hi NCL users

I am not able to plot 20 years of MODIS data spatially. Each file (every year) has 3.3 GB.
And I get the ncl message "killed" when I try to plot. It is probably a lack of memory, although it is using a machine with 64 GB of memory.
So, any ideas how I could read this data and plot, perhaps decreasing its size?

The original data was in hdf, but the ncl also breaks if I try to read 20 years of data at once to plot, so I separated each file by year, selecting the variable and region of interest, creating netcdf files.

Thanks for any help
_______________________________________________
ncl-talk mailing list
ncl-talk at ucar.edu<mailto:ncl-talk at ucar.edu>
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk<http://mailman.ucar.edu/mailman/listinfo/ncl-talk>


University of Tasmania Electronic Communications Policy (December, 2014).
This email is confidential, and is for the intended recipient only. Access, disclosure, copying, distribution, or reliance on any of it by anyone outside the intended recipient organisation is prohibited and may be a criminal offence. Please delete if obtained in error and email confirmation to the sender. The views expressed in this email are not necessarily the views of the University of Tasmania, unless clearly intended otherwise.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20190316/de3c706c/attachment.html>