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Regards, Simone Giannecchini == Meet us at GEO Business 2014! in London! Visit http://goo.gl/fES3aK for more information. == Ing. Simone Giannecchini @simogeo Founder/Director GeoSolutions S.A.S. Via Poggio alle Viti 1187 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 ------------------------------------------------------- On Tue, Apr 29, 2014 at 12:30 AM, tt5430 <[email protected]> wrote: > Hi Simone, > > Below are my answers to you questions: > > 1. The slides suggest that ImageMosaic should not be used if the number of > files is high and instead use ImagePyramid. I changed to use ImageMosaic > and the performance is good. > 2. Not sure if it is neccessary, but the reason for warping to EPSG:3857 is > because I have other layers such as OSM which already has that projection. > Also, we use Leaflet engine for displaying maps and I believe its default > projection is EPSG:3857. Also, is it desirable not to have Geoserver > perform re-projection on the fly? That is usually not a problem, reprojection is optimized hence it should not make a huge difference. What is the original CRS for this data. > 3. We are using the latest stable Geoserver version 2.5.0. > 4. Here is the content of the Mosaic.properties > #-Automagically created from GeoTools- > #Thu Apr 24 15:52:05 GMT+00:00 2014 > Levels=1.3832528371921782,1.3832528371921782 > 2.766505674384357,2.7665056743843564 5.531165781274127,5.533011348768713 > 11.05495667483989,11.066022697537425 22.10991334967978,22.1320 > 4539507485 44.10222077728679,44.17375591098613 > 88.20444155457358,87.98837559505368 176.40888310914715,174.55758384180004 > Heterogeneous=true > AbsolutePath=false > Name=Sioux-Falls > TypeName=Sioux-Falls > Caching=false > ExpandToRGB=false > LocationAttribute=location > CheckAuxiliaryMetadata=false > LevelsNum=8 > This is sub-optimal Heterogeneous=true which means that the granules have different resolutions. I believe this comes from the fact that you reprojected to EPSG:3857, this is why I would probably prefer to use the original CRS and reproject on the fly at the end if possible. > 5. What I am doing is to provide some means for the user to download the > NAIP imagery from the website and upload them to our map server, which is > Geoserver, prepare the data, and install them onto Geoserver for rendering. > Since we have no control on how the user download the NAIP imagery, the > number of files can be large. I have tried with a download that has 120 jp2 > files and used ImagePyramid for it. Are you sure you are not using ImageMosaic instead? > The performance was really good. One > thing I noticed is the size of the pyramid is big; it is 16 GB. Your > suggestion of merging some of the original jp2 files sound great but I am > not sure what is the best way to do it since the number of jp2 files is > unpredictable and the process has to be done by some script. Can you give > me some ideas? you might want to check these pages: http://geoserver.geo-solutions.it/edu/en/raster_data/index.html > Also, is there a limit of the number of GeoTiff files before > the performance of ImagePyramid becomes degraded. > Some euristic is in the slides I have pointed you at. > Thanks, > Tam > > > > -- > View this message in context: > http://osgeo-org.1560.x6.nabble.com/Prepare-GeoTiff-data-for-optimal-performance-tp5136963p5137629.html > Sent from the GeoServer - User mailing list archive at Nabble.com. > > ------------------------------------------------------------------------------ > "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE > Instantly run your Selenium tests across 300+ browser/OS combos. Get > unparalleled scalability from the best Selenium testing platform available. > Simple to use. Nothing to install. Get started now for free." > http://p.sf.net/sfu/SauceLabs > _______________________________________________ > Geoserver-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-users ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available. Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
