On Fri, Oct 2, 2015 at 9:40 PM, Cathy Hu <[email protected]> wrote:
> Hi All: > > > > I’m using GeoServer 2.8.0. I have an ImageMosaic Layer (which configured > to read granules information from DB). The granules are browse images and > they are stored in the file system. One problem I have now is that when I > display/overlay the granules (the browse images, filtered using cql filter) > on our base map using OpenLayers 3, there’s huge white space (see pictures > below). I think it’s not the browse image data problem because if I only > have that set of browse images (belong to one dataset) to the layer, the > display is OK, and if I continually add other datasets to the layer, and at > some point, the display has the white space problem. Any idea? Is it > related to the “mosaic” operation or the limitations about the ImageMosaic > layer: > > 1. All the granules must share the same Coordinate Reference System, > no reprojection is performed. This will always be a constraint. > > 2. All the granules must share the same ColorModel and SampleModel. > This is a limitation/assumption of the underlying JAI Mosaic operator: it > basically means that the granules must share the same pixel layout and > photometric interpretation. It would be quite difficult to overcome this > limitation, but to some extent it could be done. Notice that, in case of > colormapped granules, if the various granules share the same colormap the > code will do its best to retain it and try not to expand them in memory. > This can also be controlled via a parameter in the configuration file (se > next sections) > > 3. All the granules must share the same spatial resolution and set > of overviews (if this is not true, overviews will not be used). > > I’m sure our browse images are OK for No.1 and for No. 3, we set the > “Heterogenous=true”, but not really understand No2, and not sure about if > our data meet that, how do I know? > It basically means you cannot have a mix of gray and color images. This limitation has been removed in GeoServer 2.8.0, but only if you pass this system variable to the JVM that's running GeoServer: -Dorg.geotools.coverage.jaiext.enabled=true 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. -------------------------------------------------------
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