Ciao Devon,
I might not have expressed correctly myself there.

I did not mean to suggest you to look at the streaming renderer, I
wanted to say that an example of  the _easy_ way to mosaick raster in
different CRSs is done at an higher level than the ImageMosaic itself
which is using the StreamingRenderer.

Forget about that for the moment, it was a misleading suggestion probably.

Staying inside the ImageMosaic, my suggestion would still be valid.
Let me see Jody's comment.

Regards,
Simone Giannecchini
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On Tue, Apr 12, 2016 at 11:06 PM, Devon Tucker <devonrtuc...@gmail.com> wrote:
> Hi Simone,
>
> Thanks for the input. I'll take a look at StreamingRenderer although
> according to Jody it may not be appropriate since we would like to do WCS
> output as well.
>
> Your advice for initially mosaicking by CRS is definitely well-received.
> Good idea.
>
> Cheers,
> Devon
>
> On Tue, Apr 12, 2016 at 11:03 AM, Simone Giannecchini
> <simone.giannecch...@geo-solutions.it> wrote:
>>
>> Ciao Devon,
>> quick answer, andrea will provide more.
>>
>> We have implemented something similar a few times in the past for
>> clients specific customizations so we have a pretty clear idea on what
>> to do.
>> First thing, GeoServer is already able to mosaic raster in different
>> CRS but at an higher level, inside the streaming renderer which leans
>> onto the streaming renderer for reprojecting.
>>
>> Bring this at a lower level is challenging if we want to keep both
>> performance and quality or at least if we want to be able to control
>> them. If I had to suggest something right now, I would suggest to
>> group them by source CRS then mosaick them and then reproject each
>> mosaic to the target CRS so that raster data in the same CRS with
>> different resolutions can be handled separately.
>>
>> Let's see what andrea says...
>>
>> Putting this on the table upfront, don't come up with a PR that will
>> touch 1k files  (i.e impossible to review) without having discussed
>> the approach before because it will hardly be accepted.
>> No intent to be a showstopper, I'd like this functionality to get in
>> but you are biting on an hard candy trying to implement it.
>>
>> Regards,
>> Simone Giannecchini
>> ==
>> GeoServer Professional Services from the experts!
>> Visit http://goo.gl/it488V for more information.
>> ==
>> Ing. Simone Giannecchini
>> @simogeo
>> Founder/Director
>>
>> GeoSolutions S.A.S.
>> Via di Montramito 3/A
>> 55054  Massarosa (LU)
>> Italy
>> phone: +39 0584 962313
>> fax:     +39 0584 1660272
>> mob:   +39 333 8128928
>>
>> 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.
>>
>>
>> On Tue, Apr 12, 2016 at 7:17 PM, Devon Tucker <devonrtuc...@gmail.com>
>> wrote:
>> > Hi all,
>> >
>> > We've been looking into doing on-the-fly reprojection in image mosaic to
>> > handle multiple projections dynamically (kinda similar to what QGIS can
>> > do).
>> > Some of the issues with this we've worked out already, but one thing
>> > I've
>> > been wondering is where might be an appropriate place in the code to do
>> > the
>> > actual resampling.
>> >
>> > My first thought would be somewhere in the RasterLayerResponse either in
>> > the
>> > prepareResponse or produce methods either during or after the granules
>> > are
>> > collected, but I'm definitely interested in advice/feedback on what's
>> > good/appropriate.
>> >
>> > Also interested in feedback on this idea in general and maybe issues or
>> > corner cases we may not have thought about.
>> >
>> > Thanks,
>> > Devon Tucker
>> >
>> >
>> > ------------------------------------------------------------------------------
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>
>

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