Ciao Tim, you should probably post these questions to the geoserver users mailing list.
Simone. ------------------------------------------------------- Ing. Simone Giannecchini GeoSolutions S.A.S. Owner - Software Engineer Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it http://simboss.blogspot.com/ http://www.linkedin.com/in/simonegiannecchini ------------------------------------------------------- On Wed, Apr 22, 2009 at 10:49 AM, TJMartin <tjm...@gmail.com> wrote: > > Hi christian > > many thanks for your help, i will run this later on today/overnight :) > > I saw that Geoserver tutorail using the database to store the files but > think i will stick with using just files. > > will postback later on if and when i get it all running > > thanks again > > Tim > > > > Christian Müller wrote: >> >> Hi, I did this process last year many times and here is my experience >> >> 1) I assume you omitted the create options, your original tiff files are >> compressed, the new ones not. >> Look here http://www.gdal.org/frmt_gtiff.html, on the commandline it is >> -co >> "COMPRESS=JPEG" as an example. >> >> 2) Take a look at your tiles with gdalinfo, do the have a color table or >> more bands ?. If your tiles have >> more bands, (e. g. one for read, one for green and one for blue), use >> gdal_merge.py with -pct to produce a big picture >> having only one band and a color table. Create your tiles from the big >> picture. Geoserver will say thank you in terms >> of memory usage and cpu performance. >> >> 3) Decide, wich Geoserver module to use. There are 2 of them. There is a >> file based approach and a jdbc based >> approach (Module imagemosic-jdbc). If you want to store the whole stuff in >> a >> database, use gdal_retile.py to procude your >> tiles and pyramids and the imagemosic-jdbc module to import all the tiles. >> Both, gdal_retily.py and the imagemosaic-jdbc >> module were developed by me, if you have questions, ask. >> >> The documentation is here >> http://docs.codehaus.org/display/GEOTDOC/Image+Mosaicing+Pyramidal+JDBC+Plug >> in >> A tutorial for geoserver is here >> http://geoserver.org/display/GEOSDOC/Using+the+ImageMosaic+JDBC+Plugin >> >> christian >> >> >> TJMartin writes: >> >>> >>> Hi All >>> >>> I am just getting started with gdal, and i have done a search but couldnt >>> find an answer. >>> >>> I currently have 10,000 tiff files with their world files. My real aim is >>> to >>> tile them up and make them easier to use in Geoserver or create an image >>> pyramid. >>> >>> So i used gdal_translate to Geotiff, then was going to use gdalwarp to >>> mosaic, then tile them. >>> >>> However the file size for geotiffs are between 4 and 15 times the size >>> >>> 4mb to 60mb >>> >>> One set were originally 128mb and now 858mb. >>> >>> So if i was to mosiac these and then tile them it will still be a huge >>> data/size volume to server via geoserver. >>> >>> >>> So my questions >>> >>> 1) Can i reduce the quality when translating to geotiff, and how much >>> will >>> this affect the image quality when i mosaic and tile >>> >>> 2) Should i mosaic the tiff + world files instead and then tile them with >>> world files instead of using geotiffs >>> >>> 3) is there a better way of doing this? >>> >>> would really appreciate anyone's help >>> >>> all the best >>> >>> Tim >>> >>> -- >>> View this message in context: >>> http://n2.nabble.com/gtiff-file-size-compared-to-original-tiff-%2Bwrld-file-tp2672921p2672921.html >>> Sent from the GDAL - Dev mailing list archive at Nabble.com. >>> >>> _______________________________________________ >>> gdal-dev mailing list >>> gdal-dev@lists.osgeo.org >>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >> >> >> _______________________________________________ >> gdal-dev mailing list >> gdal-dev@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/gdal-dev >> >> > > -- > View this message in context: > http://n2.nabble.com/gtiff-file-size-compared-to-original-tiff-%2Bwrld-file-tp2672921p2674970.html > Sent from the GDAL - Dev mailing list archive at Nabble.com. > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
