[Geoserver-devel] combining rasters to make one

GeoServer GeoServer Developer
1

Hi,

I was wondering if there exists any tool in the geotools/geoserver framework to do the following:
Given two rasters A[x,y] and B[x,y] you want to output a single layer with colors C[x,y] = some_calculation(A[x,y], B[x,y]) which can be expressed in a simple CQL expression.

I thought of doing this with SLD. I considered the rasters could be put in different bands of the same raster file, because combining data from different layers does not seem possible in SLD, but it even that does not seem to make it possible. Unlike for vector tiles it does not seem possible to do calculations on the basis of bands like you can do with feature properties. You only have color maps.

I also found this http://docs.geoserver.org/stable/en/user/styling/sld-extensions/rendering-transform.html
But that does not include raster(s)-to-raster conversion.

Wondering if there is something that I am missing.

Regards
Niels

2

On Mon, Jun 29, 2015 at 10:32 AM, Niels Charlier <niels@anonymised.com> wrote:

I also found this

http://docs.geoserver.org/stable/en/user/styling/sld-extensions/rendering-transform.html
But that does not include raster(s)-to-raster conversion.

Wondering if there is something that I am missing.

This one: https://github.com/geotools/geotools/pull/534
Not sure what its current state is though, cc'ing Alessio

Cheers
Andrea

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3

Look at JAI tools and JAI tools jiffle (http://jaitools.org/docs/jiffle/latest/userguide/html/)

···

On Mon, Jun 29, 2015 at 10:32 AM, Niels Charlier <niels@anonymised.com> wrote:

I also found this
http://docs.geoserver.org/stable/en/user/styling/sld-extensions/rendering-transform.html
But that does not include raster(s)-to-raster conversion.

Wondering if there is something that I am missing.

This one: https://github.com/geotools/geotools/pull/534
Not sure what its current state is though, cc’ing Alessio

Cheers
Andrea

–

==
GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.

Ing. Andrea Aime

@geowolf
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.