Ciao Stephen, can you be more specific about the steps you have done? I think I am a bit lost in the wild...
Regards, Simone Giannecchini ------------------------------------------------------- Ing. Simone Giannecchini GeoSolutions S.A.S. Founder Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 962313 mob: +39 333 8128928 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.youtube.com/user/GeoSolutionsIT http://www.linkedin.com/in/simonegiannecchini http://twitter.com/simogeo ------------------------------------------------------- On Wed, May 4, 2011 at 9:40 PM, Stephen V. Mather < [email protected]> wrote: > Thanks Simone, > > That’s very helpful. Any known limit to how large a > pyramid can be? I broke my data out into no more than 2500 tiles at the 0 > level, because otherwise it would fail on loading into GeoServer. > Performance-wise though it is quite good. It started as 13,000 tiles > weighing in at 164GB. Pyramids ballooned that (quite predictably) by about > a third. > > Because I’ve retiled, overlap becomes an issue with the > separate blocks. Would this be best addressed with an SLD (and how would I > write transparency and three bands…?) or should I instead set transparency > while I (re)process with gdal? > > > > Thanks, > > Steve > > > > > > [image: http://www.clemetparks.com/images/esig/cmp-ms-90x122.png]Stephen > Mather > Geographic Information Systems (GIS) Manager > (216) 635-3243 > > [email protected] > clevelandmetroparks.com <http://www.clemetparks.com/> > > > > > > > > > > *From:* [email protected] [mailto:[email protected]] *On Behalf Of *Simone > Giannecchini > *Sent:* Tuesday, May 03, 2011 8:26 PM > > *To:* [email protected] > *Cc:* [email protected] > *Subject:* Re: [Geoserver-users] ImagePyramid extension vs. ImageMosaic > > > > Ciao Stephen, > > the ImageMosaic is not the proper choice when for low resolutions it will > have to open hundreds of files. > > So if you have more than 20/30 files that composes your mosaic then > performance goes from bad to unacceptable. > > There is one thing to notice, imagemosaic can be used effectively in > conjunction with formats like ecw or mrsif (or jp2) where the size of each > file can be very big and hence you can create mosaic that are very large and > still have good performance. > > > > The other approach is tu build up a pyramid. This time we create various > mosaics at various resolutions levels. When the resolutions decreases the > number of files decreases as well since usually the file size is fixed. The > drawback I foresee most part of the time with this approach is that it is > very good when it is really need but most part of the time, when data is > under 10/20 gigs there is no need to go under the task of creating the > pyramid. > > > > Long story short, you might be in the case where a pyramid is needed, since > the size of the data is quite big. > Regards, > Simone Giannecchini > ------------------------------------------------------- > Ing. Simone Giannecchini > GeoSolutions S.A.S. > Founder > > Via Poggio alle Viti 1187 > 55054 Massarosa (LU) > Italy > > phone: +39 0584 962313 > fax: +39 0584 962313 > mob: +39 333 8128928 > > http://www.geo-solutions.it > http://geo-solutions.blogspot.com/ > http://www.youtube.com/user/GeoSolutionsIT > http://www.linkedin.com/in/simonegiannecchini > http://twitter.com/simogeo > > ------------------------------------------------------- > > On Mon, Apr 18, 2011 at 5:39 PM, Stephen V. Mather < > [email protected]> wrote: > > It looks like, based on my reading, the image mosaic, unlike the pyramid > layer is not as good at serving large overviews, as everything is > partitioned into many tiles, but it is very good for serving the detailed > data itself and large volumes of it. Is this a correct assessment? > > > > Steve > > > > > > [image: http://www.clemetparks.com/images/esig/cmp-ms-90x122.png]Stephen > Mather > Geographic Information Systems (GIS) Manager > (216) 635-3243 > > [email protected] > clevelandmetroparks.com <http://www.clemetparks.com/> > > > > > > > > > > *From:* Stephen V. Mather [mailto:[email protected]] > *Sent:* Monday, April 18, 2011 11:06 AM > *To:* [email protected] > > > *Subject:* Re: [Geoserver-users] ImagePyramid extension vs. ImageMosaic > > > > Looks like I originally just sent this back to Simone: > > > > Hi Simone, > > For better or for worse, our users tend to expect to use > the data at all scales, although there is probably more I could do to > discourage this. As far as volume, we’re talking about the 150GB-800GB > range, depending on the dataset. > > > > Steve > > * * > > > > [image: http://www.clemetparks.com/images/esig/cmp-ms-90x122.png]Stephen > Mather > Geographic Information Systems (GIS) Manager > (216) 635-3243 > > [email protected] > clevelandmetroparks.com <http://www.clemetparks.com/> > > > > > > > > > > *From:* [email protected] [mailto:[email protected]] *On Behalf Of *Simone > Giannecchini > *Sent:* Thursday, April 14, 2011 5:06 PM > *To:* [email protected] > *Cc:* [email protected] > *Subject:* Re: [Geoserver-users] ImagePyramid extension vs. ImageMosaic > > > > Ciao Stephen, > I will tell you what is my take on this. > > First discriminant, you want to to show the data at all scales or just at > the small scales ? > Second discriminant, how much data are we talking about? Order of terabytes > or order of (tenth of) gigabytes? > > Generally speaking I tend to avoid using a pyramid (files base or db based) > and thend to prefere a mosaic; anyway it would be great a bit more about > your use case. > > > Regards, > Simone Giannecchini > ------------------------------------------------------- > Ing. Simone Giannecchini > GeoSolutions S.A.S. > Founder > > Via Poggio alle Viti 1187 > 55054 Massarosa (LU) > Italy > > phone: +39 0584 962313 > fax: +39 0584 962313 <%2B39%200584%20962313> > mob: +39 333 8128928 <%2B39%20333%208128928> > > http://www.geo-solutions.it > http://geo-solutions.blogspot.com/ > http://www.youtube.com/user/GeoSolutionsIT > http://www.linkedin.com/in/simonegiannecchini > http://twitter.com/simogeo > > ------------------------------------------------------- > > On Thu, Apr 14, 2011 at 5:18 PM, Stephen V. Mather < > [email protected]> wrote: > > Hi All, > > Looking at the options for serving large amounts of > imagery, what are the performance and practical differences between > ImagePyramid and ImageMosaic? Is there any known ceiling to 1) number of > images 2) total size and extent of images for either method? > > > > Thanks, > > Steve > > > > > > [image: http://www.clemetparks.com/images/esig/cmp-ms-90x122.png]Stephen > Mather > Geographic Information Systems (GIS) Manager > (216) 635-3243 > > [email protected] > clevelandmetroparks.com <http://www.clemetparks.com/> > > > > > > > > > > > > ------------------------------------------------------------------------------ > Benefiting from Server Virtualization: Beyond Initial Workload > Consolidation -- Increasing the use of server virtualization is a top > priority.Virtualization can reduce costs, simplify management, and improve > application availability and disaster protection. Learn more about boosting > the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev > _______________________________________________ > Geoserver-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-users > > > > > > ------------------------------------------------------------------------------ > Benefiting from Server Virtualization: Beyond Initial Workload > Consolidation -- Increasing the use of server virtualization is a top > priority.Virtualization can reduce costs, simplify management, and improve > application availability and disaster protection. Learn more about boosting > the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev > _______________________________________________ > Geoserver-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-users > > >
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