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
