[gdal-dev] create classified PNG from ASCIIGrid

[Stephen Crawford]

Thanks for the reply.  I had looked at these before, and then looked 
again after your note, but I just don't understand how I map the climate 
variable values to different colors in the palette, along the lines of:

tmax < 30            |  color1
30 < tmax < 50   | color2
tmax > 50            | color3

Thanks,
Steve

On 7/27/2011 1:01 AM, Chaitanya kumar CH wrote:
> Sorry, here are the links.
>
> [1]: http://www.gdal.org/rgb2pct.html
>
> [2]: http://www.gdal.org/gdal_vrttut.html
> [3]: http://www.gdal.org/formats_list.html
>
> On Wed, Jul 27, 2011 at 10:30 AM, Chaitanya kumar CH <chaitanya.ch 
> <http://chaitanya.ch>@gmail.com <http://gmail.com>> wrote:
>
>     Stephen,
>
>     The docs for rgb2pct.py script [1] has an example that shows how
>     to convert to a paletted image using hand made VRT file.
>     You can use the "-of PNG" option to set the destination format as
>     png and the -pct option with your VRT file.
>
>
>     On Wed, Jul 27, 2011 at 2:42 AM, Stephen Crawford <src176 at psu.edu
>     <mailto:src176 at psu.edu>> wrote:
>
>         Hi All,
>
>         I have 60 or so asciiGrids of climate data that I would like
>         to tun into PNGs, with the climate values classified by color.
>          I would like to script this process using Python.  Is there a
>         way to do this with GDAL?  Or if not, is there any other open
>         source way to do this?
>
>         Thanks,
>         Steve
>
>
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>
>
>
>
>     -- 
>     Best regards,
>     Chaitanya kumar CH.
>
>     +91-9494447584
>     17.2416N 80.1426E
>
>
>
>
> -- 
> Best regards,
> Chaitanya kumar CH.
>
> +91-9494447584
> 17.2416N 80.1426E

-- 
Stephen Crawford
Center for Environmental Informatics
The Pennsylvania State University
src176 at psu.edu
814.865.9905

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