[gradsusr] png quality/compression

[Jennifer M Adams]

Sorry, Joey, that is not correct. There are no compression settings for png images anywhere in GrADS. You may be confused with the compression level that is hard-coded for writing out netcdf-4 files.

The png files generated by GrADS 2.1+ are large; I use the external utility pngquant to shrink them. For more info about about pngquant and GrADS, do a google search with “site:gradsusr.org pngquant”
—Jennifer

On Mar 21, 2016, at 12:01 PM, Joey Woodson <instantweathermaps at gmail.com<mailto:instantweathermaps at gmail.com>> wrote:

Yes, but you have to change the source code and recompile GrADS. It's already on a fairly high compression setting by default if I recall correctly though.

Joey Woodson
InstantWeatherMaps.com<http://InstantWeatherMaps.com>

On Mar 21, 2016, at 8:01 AM, AMS EmsiWx Bytča <emsiwx at pocasie-bytca.sk> wrote:

Dear Grads users,

is it possible to reduce png file size from Grads by setting png
quality/compression?

Thank you for your time and help.

Kindest regards,

Marian
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--
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
George Mason University



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