Ciao Tam, please, read below...
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 Wed, Apr 30, 2014 at 4:49 PM, tam tran <[email protected]> wrote: > Hi Simone, > > Thanks for the response. Here are my answers to your questions: > > 1. The original CRS is: EPSG:26911. One other reason for re-projection to > EPSG:3857 is so that we can use GeoWebCache. We already have EPSG:3857 > Gridset defined in Geoserver. I don't see the point or better I believe this is a misunderstanding on your side. You do not need to reproject the data yourself (or better this is not required) GeoServer will handle that. You might just want to use the gutter param in GWC to cut away eventual black borders. > 2. Below was what I did: > > for file in *.jp2;do > filename=`echo "$file" |cut -d'.' -f1` > gdal_translate -of GTiff $file $filename.tif > gdalwarp -t_srs EPSG:3857 $filename.tif $filename-warped.tif > mv $filename-warped.tif $filename.tif > gdal_retile.py -v -r bilinear -levels 4 -ps 2048 2048 -co "TILED=YES" -co > "BLOCKXSIZE=256" -co "BLOCKYSIZE=256" -co "COMPRESS=DEFLATE" > -useDirForEachRow -targetDir pyramid $filename.tif > done > After that I create a ImagePyramid store that the GeoTiff. Does that mean I > use ImagePyramid or ImageMosaic? You used the ImagePyramid :) That is ok, but if this size is ok, I would probably go with the ImageMosaic which is simpler to manage (or at least this is my opinion). Check carefully the doc I gave you, the answers are somewhat in there. > > Regards, > Tam > > > > On Wed, Apr 30, 2014 at 6:55 AM, Simone Giannecchini > <[email protected]> wrote: >> >> Ciao, >> please read below... >> >> >> 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. 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