NCL operationally

Hi all,
Having written a huge NCL script to produce a great number of
semi-operational plots, I can confirm that writing to PS then converting to
GIF or PNG usign convert is very slow for a large number of images. I have
gain a lot of performance writing instead in NCGM with a proper resolution
setting, and then converting to GIF or PNG using convert without much loss
of image quality.

Christian
http://meteocentre.com/home_e.html

On Mon, Jan 19, 2009 at 16:08, <Oliver.Fuhrer_at_meteoswiss.ch> wrote:

> Hi all,
>
> We are currently benchmarking NCL against MetView (from ECMWF). The goal
> would be to use NCL operationally to produce plots of our model output. Most
> of these products are produced in time-critical mode.
>
> Currently, there seem to be two bottlenecks that are slowing NCL down
> considerably as compared to MetView. The first is the reading of our model
> output in grib1 format. After offline conversion using ncl_convert2nc to
> NetCDF format and execution of the same script simply reading a couple of
> fields from a couple of files, the script runs 10x faster. The second is the
> generation of raster graphics using NCL. A lot of our plots are disseminated
> in PNG or GIF format. MetView can directly write these formats whereas NCL
> writes a PS or PDF and the raster format is produced using the "convert"
> utility.
>
> 1) I would be very much interested in future plans for NCL concerning these
> two points.
>
> 2) Would a generation of NCGM and conversion using ctrans to a raster
> format bring any gain in performance?
>
> Thanks and kind regards,
> Oliver
>
>
> ________________________________________
>
> Oliver Fuhrer
> Numerical Models
>
> Federal Departement of Home Affairs FDHA
> Federal Office of Meteorology and Climatology MeteoSwiss
>
> Kraehbuehlstrasse 58, P.O. Box 514, CH-8044 Zurich, Switzerland
>
> Tel. +41 44 256 93 59
> Fax +41 44 256 92 78
> oliver.fuhrer_at_meteoswiss.ch
> www.meteoswiss.ch - First-hand information
>
>
>
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Received on Mon Jan 19 2009 - 08:13:16 MST