I use Geoserver 2.0.2
I tried following styles :
<ColorMap extended="true">
<ColorMapEntry color="#000000" quantity="-500" label="nodata"
opacity="0.0" />
<ColorMapEntry color="#000000" quantity="-100" label="values"
opacity="1.0" />
<ColorMapEntry color="#00FFFF" quantity="100" label="values"
opacity="1.0" />
</ColorMap>
<ColorMap extended="true">
<ColorMapEntry color="#000000" quantity="-500" label="nodata"
opacity="0.0" />
<ColorMapEntry color="#000000" quantity="-100" label="values"
opacity="1.0" />
<ColorMapEntry color="#FFFFFF" quantity="100" label="values"
opacity="1.0" />
</ColorMap>
I was expecting, for data range -100 to 100, to get pixel colors from #000000
to #00FFFF :
#000001
#000002
#000003
#000004
...
#0000FF
#0001FF
#0002FF
#0003FF
...
#00FFFF
but all I get is pixel values :
#001111
#002222
#003333
#004444
...
#00FFFF
So ther is only 256 different values in my image.
How can I should configure colors to get 65k pixel colors and be able to
compute "pixel color" => "data value" conversion on client side ?
Regards,
Aurelien
________________________________________
De : [email protected] [[email protected]] de la part de Andrea Aime
[[email protected]]
Date d'envoi : lundi 27 juin 2011 18:46
À : Simone Giannecchini
Cc : ALBERT Aurélien; Mike; [email protected]
Objet : Re: [Geoserver-users] GeoServer with elevation data
On Mon, Jun 27, 2011 at 6:20 PM, Simone Giannecchini
<[email protected]> wrote:
> Ciao Albert,
> first thing off, which version of GeoServer are you using?
> That said the output will distribute as many as 65k colors withing the
> breakpoints of the colormaps. Not sure what you mean by " I don't see
> where the 16 bits interpolation is on my output image"
Just to provide a visual example of the difference see the attached images.
simple.jpeg uses a plain color ramp, there is no extended=true
extended.jpeg uses extended=true instead
The difference can be seen pretty much everywhere, though it's more evident
over the sea.
Hope this helps
Cheers
Andrea
PS: the above images were generated using a nightly build of GeoServer trunk
--
-------------------------------------------------------
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 962313
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.youtube.com/user/GeoSolutionsIT
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf
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