Hi, thanks for sharing! It would have been hard to guess that you had a image mosaic without sample image, those files are mandatory and manual generation of the mosaic setup is uncommon.
Cheers Andrea On Wed, Oct 31, 2018 at 12:01 PM Arnaud L. <arnaud.lis...@codata.eu> wrote: > Le 30/10/2018 à 14:04, Arnaud L. a écrit : > > When there are granules in the bbox, even when they only partially cover > > the area, the region where there is no granule is transparent. > > But when there are really no granule to load at all, the resulting PNG > > is fully black, with no transparency. > > > > [...] > > So how can I have a fully transparent PNG image when there is no granule > > in the queried bbox ? > > All right, I found the solution ! > For the record : > In the log, the problem obviously appeared when no granule was found, > and the problematic part was : "[org.geotools.gce.imagemosaic] - > Creating constant image for area with no data" > This was logged by createBlankResponse() in RasterLayerResponse. > Trying to understand what happened in there, I saw that it created a > blank image based on the default color model and default sample model. > Then I realized I had no sample_image in the underlying mosaics, because > they are managed by my own processes. > > So the solution was simply to generate a sample_image file which would > have the same RGBA color model as my dataset. For that I created a dummy > imagemosaic datastore with a single GeoTIFF from my dataset. GeoServer > automatically generated the index file and the sample_image.dat file. > I copied this image at the root of all the imagemosaics in my pyramid, > and it instantly worked ! > > Best regards > -- > Arnaud > > > _______________________________________________ > 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 mob: +39 339 8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it ------------------------------------------------------- *Con riferimento alla normativa sul trattamento dei dati personali (Reg. UE 2016/679 - Regolamento generale sulla protezione dei dati “GDPR”), si precisa che ogni circostanza inerente alla presente email (il suo contenuto, gli eventuali allegati, etc.) è un dato la cui conoscenza è riservata al/i solo/i destinatario/i indicati dallo scrivente. Se il messaggio Le è giunto per errore, è tenuta/o a cancellarlo, ogni altra operazione è illecita. Le sarei comunque grato se potesse darmene notizia. This email is intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. We remind that - as provided by European Regulation 2016/679 “GDPR” - copying, dissemination or use of this e-mail or the information herein by anyone other than the intended recipient is prohibited. If you have received this email by mistake, please notify us immediately by telephone or e-mail.*
_______________________________________________ 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
