Hi,
in coverage view, different wieghts to bands could be achieved by utilizing
a raster algebra through Ras:Jiffle added in GeoServer version 2.14.
https://docs.geoserver.org/stable/en/user/styling/sld/extensions/rendering-
transform.html#running-map-algebra-on-the-fly-using-jiffle
(https://docs.geoserver.org/stable/en/user/styling/sld/extensions/rendering-transform.html#running-map-algebra-on-the-fly-using-jiffle)
The script itself would look something like:
<span
style='margin:0px;padding:0px;border:0px;font-weight:bold;font-style:inherit;font-family:inherit;vertical-align:baseline;color:rgb(6,40,115)'><ogc:Literal></span>
first = src[0];
second = src[1];
third = src[2];
dest = (3*first + 4*second + 5*third) / 12;
<span
style='margin:0px;padding:0px;border:0px;font-weight:bold;font-style:inherit;font-family:inherit;vertical-align:baseline;color:rgb(6,40,115)'></ogc:Literal></span>
Lubomir Bucek
---------- Původní e-mail ----------
Od: Rahkonen Jukka (MML) <[email protected]>
Komu: Jon Britton <[email protected]>, geoserver-users@lists.
sourceforge.net <[email protected]>
Datum: 8. 1. 2019 10:47:27
Předmět: Re: [Geoserver-users] SLD for styling RGB raster as grayscale
"
Hi,
How about making a new layer through coverage view https://docs.geoserver.
org/latest/en/user/data/raster/coverageview.html
(https://docs.geoserver.org/latest/en/user/data/raster/coverageview.html)?
A grayscale image from RGB might get better if different weights are applied
to input bands but I do not know if it is possible with coverage views.
-Jukka Rahkonen-
Lähettäjä: Jon Britton [mailto:[email protected]]
Lähetetty: 8. tammikuuta 2019 10:59
Vastaanottaja: [email protected]
Aihe: [Geoserver-users] SLD for styling RGB raster as grayscale
Hi,
We need to be able to provide a grayscale version of one of our map layers,
however there isn’t an obvious way to do this. It easy to produce a single-
band grayscale image, e.g.:
<RasterSymbolizer>
<Opacity>0.6</Opacity>
<ChannelSelection>
<GrayChannel>
<SourceChannelName>1</SourceChannelName>
</GrayChannel>
</ChannelSelection>
</RasterSymbolizer>
However I need to include all bands. Is there a way to do this using an SLD
without pre-processing the data? The image is RGB.
Thanks,
Jon
Jon Britton
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Please make sure you read the following two resources before posting to this
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http://geoserver.org/comm/userlist-guidelines.html
If you want to request a feature or an improvement, also see this:
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer
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