Hi Andrew,
JAI exposes image processing operators for non geo-referenced image. It
uses an API that is not with WPS, at least right now.
Bridging the two indeed requires some java programming, indeed. Typically
this happens by writing a process, see for example this one:
https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/BandSelectProcess.java
this one works off geo-refenced raster, and it's actually delegating to
another class that eventually calls onto JAI:
https://github.com/geotools/geotools/blob/d1f91461618b220a3272b0d9ffb807ef6fe68721/modules/library/coverage/src/main/java/org/geotools/coverage/processing/operation/BandSelector2D.java#L1
These bridges are built on a as-needed basis, I'm not aware of more
processes being built at the moment.
If you cannot contribute directly with code and still want some extra
process implemented for you, check this page: http://geoserver.org/support/
Hope this helps!
Cheers
Andrea
On Tue, Feb 20, 2018 at 7:40 AM, Andrew Macleod <suteragong...@gmail.com>
wrote:
> Hi Guys
>
> We have recently been experimenting with the Geoserver WPS
> module with some great results e.g using the BarnesSurface interpolation
> process on some point data, cropping the resultant raster and importing as
> a new coverage into Geoserver. It’s an extremely powerful engine once you
> start combining and chaining processes and I’m hoping to write up some of
> our experiences soon. Based on this work, I have a current use-case that
> requires some grid arithmetic/algebra. Something like (CONSTANT –
> rasterValue) * UserVariable -> newRaster.
>
>
>
> I’ve scoured the web, docs, mailing lists to see if this may be possible
> using Geoserver and WPS. This led me to the JAI-EXT project which appears
> to have operations that would be suitable. I’ve followed the instructions
> at http://docs.geoserver.org/stable/en/user/configuration/
> image_processing/index.html to enable the library and I can now see the
> JAI/JAIExt Setup panel in the Image processing page. What I’m not clear
> on is the next step, or indeed if I’ve missed the point entirely. From my
> reading, I believe the project to replace JAI is a work in progress so it
> might be as simple as we need to move to the latest Geoserver version (or
> wait for a future one). However, assuming it is working, how would we go
> about registering one or more of the additional processes so they are
> available to the WPS module? Or is this something being worked on by
> others? The ‘Math operation with Constant’ seems like the operation I need,
> although If I look at the JAI-ext github it refers to jt-algebra. I’ve
> scanned over the tutorial(s) on GeoTools http://docs.geotools.org/
> stable/userguide/tutorial/raster/jaiext.html but we don’t currently have
> a java developer in the team so this may limit what is possible for us. Happy
> to contribute if we can.
>
>
>
> System Information---------------------
>
> GeoServer Version: 2.11.1 / Tomcat 8
>
> java version "1.8.0_111"
>
> Ubuntu 16.04.1 (64-Bit)
>
> Please note: I haven’t reviewed the startup logs in detail since the
> configuration change to enable JAI-ext so if it’s likely to be a
> configuration issue I can do some more digging.
>
>
>
> Cheers
>
> Andrew
>
> _________________________________________________________________________
>
> *Andrew MacLeod*
>
> Manager, Technical Projects | Centre for eResearch & Digital Innovation
>
> Office of Deputy Vice Chancellor (Research & Innovation)
>
> Federation University Australia | Mt Helen | Greenhill Enterprise Centre
>
> PO Box 691 Ballarat VIC 3353
>
> a.macl...@federation.edu.au
>
>
> ------------------------------------------------------------
> ------------------
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> _______________________________________________
> Geoserver-users mailing list
>
> Please make sure you read the following two resources before posting to
> this list:
> - Earning your support instead of buying it, but Ian Turton:
> http://www.ianturton.com/talks/foss4g.html#/
> - The GeoServer user list posting guidelines: 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
>
>
> Geoserver-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/geoserver-users
>
>
--
Regards,
Andrea Aime
==
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 di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
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Please make sure you read the following two resources before posting to this
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