On 11/15/06, Olivier Doucet <[EMAIL PROTECTED]> wrote:
> Ciao Simone,
>
> 2006/11/14, Simone Giannecchini <[EMAIL PROTECTED]>:
> > Ciao Olivier,
> > you need to specify a wild card, something like
> > -s /usr/simone/work/data/ -w *.tiff -name imm
>
>
> Thanks, it works now!
Any doubts? :-)
Really, which versin of geotools are you playing with? I hope 2.3.x...
>
> > if you want the mosaic builder to be able to find the correct files
> > you want to index.
> >
> > Aside from this, if you have one single tiff which is not too big (up
> > to 300-400 mb) I recommend you use the OverviewsEmbedder which just
> > embeds overviews inside the same file.
>
>
> I tried the mosaic and pyramid utils on one small file (230 Mb) but I'll
> eventually use several files of around 1.2 Gb each, so it sounds like the
> pyramid is a better idea.
> As I understand it, the overview isn't divided into tiles, is that correct?
> Which reader should be used to display it?
>
The OverviewsEmbedder just embeds overviews inside tiff and geotiff,
You need to use the WorldImageReader or the GeoTiffReader to read this
single files afterwards.
Anyway, if you wish to build a pyramid starting with a few very big
files I suggest these steps:
1>Build a mosaic for the input files.
2>Use the CoverageTiler and tile the mosaic you just created. This way
you will split the mosaic into smaller tiles that will perform much
faster than a couple of huge coverages.
3>Rebuild the mosaic for the first level
4>Build the successive levels.
Smaller tiles (1-1.5 mb) are very fast inside the GeoServer since we
use multiple threads (actually I think it is about time to make the
number of threads configurable) to load them.
>
> Also concerning the PyramidBuilder options, I have a few questions :
>
> -t (--tiled_dimension)
>
> Is there a recommended/default value?
> How to estimate the right dimension?
There is no magic number. More or less make tiles as big as needed to
have each one of them around 1mb. To estimate the size more or less do
as follows
num_bands*tile_width*tile_height*size_of_data_type/8
For an rgb byte tile of 512x512 you get 3*512*512=768k which is not
bad. I usually use 800*800 though (I dunno why :-) )
> Can this value be different from one level of the pyramid to another?
Sure thing. It only has a meaning internal to each level. It basically
controls the number of tiles you get.
There is only one thing that must not change between two levels, the
envelope covered.
>
> -c (--cache_size)
>
> Is it just a parameter to optimize the use of the resources when building
> the pyramid or does this affect the final product of the PyramidBuilder?
> Could you give an example of value here.
>
This element controls the TileCache size used for building the
pyramid. The bigger it is the faster the tool will perform because it
will cache successive tiles in memory. Use at least 64 mb, I usually
use 400 mb which big raster.
>
> Finally, I'd need more details about the properties file to provide at the
> last step of pyramid building.
> Your example raises two questions:
>
> #
> #Mon Aug 21 22:23:27 CEST 2006
> #name of the coverage
> Name=ikonos
> #different resolution levels available in each mosaic
> Levels=1.2218682749859724E-5,9.220132503102996E-6
> 2.4428817977683634E-5,1.844026500620314E-5
> 4.8840552865873626E-5,3.686350299024973E-5
> 9.781791400307775E-5,7.372700598049946E-5
> 1.956358280061555E-4,1.4786360643866836E-4
> 3.901787184256844E-4,2.9572721287731037E-4
> #where all the levels reside
> LevelsDirs=0 2 4 8 16 32
> #number of levels availaible
> LevelsNum=5
> #envelope for this pyramid
> Envelope2D=13.398228477973406 ,43.591366397808976
> 13.537912459169803,43.67121274528585
>
> 1- How do you get the different resolution levels in the 'Levels' section?
>
You can get the resolution levels out of the single levels' properties file.
> 2- LevelsDirs=0 2 4 8 16 32 suggests that we have a 6 level pyramid, however
> LevelsNum=5... Is it level 0 that doesn't count?
That should be an error! I will check asap. The level number should
match the number of availaible dirs.
>
>
> Thank you for your help.
>
> Olivier
>
>
No problem man, thx for your feedback and keep me posted on how things
proceed. Any suggestions on how to improve the tools is highly
appreciated (donations are even more appreciated :-) )
Simone.
>
> > Simone.
> >
> > On 11/14/06, Olivier Doucet < [EMAIL PROTECTED]> wrote:
> > > Hi Simone,
> > >
> > > I am also trying to use the image mosaic & pyramid tools, but without
> > > success so far...
> > >
> > > If I understand correctly, the build a pyramid out of a single image.tif
> > > file, I first have to use the MosaicIndexBuilder.
> > > The folder I give as a parameter contains only 3 files:
> > > - image01.tif
> > > - image01.tfw
> > > - image01.prj
> > >
> > > A strange thing is,
> > >
> > > at line 238 in MosaicIndexBuilder.java
> > > The index of the iteration "for (int i = 0; i < numFiles; i++) {"
> > > is used line 336 for testing whether it is the first time "if (i == 0)
> {" we
> > > have to treat an image.
> > > So what if the folder contains non image files and and one of those is
> > > iterated first?
> > > Then globEnvelope is null when accessed in the else section.
> > >
> > > Are there any examples on how to use these utils? You refer to geotools
> > > examples but I couldn't find them...
> > >
> > > Thank you.
> > >
> > > Olivier
> > >
> > >
> > >
> > > 2006/10/20, Simone Giannecchini < [EMAIL PROTECTED] >:
> > > >
> > > > Ciao Sandor,
> > > > sorry for not being able to get to you earleri, but I am constantly 3
> > > > days behind schedule with emails.
> > > > Read below.
> > > >
> > > > On 10/18/06, Sándor Farkas < [EMAIL PROTECTED]> wrote:
> > > > >
> > > > >
> > > > > Hi Simone,
> > > > >
> > > > > Im Sándor from Hungary, I have some question about imaging and WCS
> image
> > > > > plugins.
> > > > > First I asked Alessio and He gave me your address as You are the
> imaging
> > > > > expert.
> > > > >
> > > > > I would like to publicate orthophoto GEOTIFF-s with WCS and I ask
> you to
> > > > > help me find the best way for quality/performance optimum.
> > > > >
> > > > > I have 112 pcs (orthophoto) GEOTIFF images , about 107 Mb of size
> each.
> > > I
> > > > > made them tiled whith
> > > > >
> > > > > C:\Progra~1\FWTools1.0.5\bin\tiffcp.exe -w 256 -l
> 256
> > > > > 65-324-111.tif
> > > > > 65-324-111_t.tif
> > > > > ...
> > > > >
> > > > >
> > > >
> > > > k.
> > > >
> > > > > and used
> > > > > c:\Progra~1\FWTools1.0.5\bin\gdaladdo.exe -r
> average
> > > > > d:\65-322-
> > > > > 431_t.tif 2 4 8 16 32 64
> > > > > ...
> > > > >
> > > >
> > > > k.
> > > >
> > > > >
> > > > > then I used
> > > > > c:\Progra~1\FWTools1.0.5\bin\gdaltindex.exe
> > > > > Budaors_tiled.shp *.tif
> > > > >
> > > >
> > > > To create the mosaic the best thing to do is using the
> > > > MosaicIndexBuilder tool you can find at the link below. Otherwise you
> > > > would have to manually create the accompanying property file. Iwould
> > > > lik to remarck once again that all the images must have the same
> > > > resolution. This constraint could be relaxes but right now I have time
> > > > allocated for this taks (unless someone wants it badly and pays for it
> > > > :-) ).
> > > >
> > > >
> > > >
> > > >
> > > > > After then, when I made the Image mosaicking coverage and watched it
> in
> > > > > UDIG, I saw that all images are malformed which are at the boundary,
> but
> > > > > seems good in the middle, where they have adjacent images. I
> attached
> > > some
> > > > > pictures to the mail.
> > > > > What could I do with this?
> > > > >
> > > > Well, I fixed a bug in the ImageMosaic a couple of days ago, which
> > > > version of geotools,geoserver are you runing?.
> > > >
> > > > >
> > > > > For testing I inserted a single image (same as in the mosaicking,
> with
> > > the
> > > > > same projection) and it looks good.
> > > >
> > > > Then definitely the you are running into the bug I fixed lately.
> > > >
> > > > > Furthermore I realized when I used Image Mosaicking, I didn't see
> > > gdaladdo-d
> > > > > levels.
> > > >
> > > > If you attach the properties files the ImageMosaic plugin uses it to
> > > > exploit embedded overviews.
> > > >
> > > > I know I should find time to write a guide for using the tools, but
> > > > for the moment I have no spare time to spend on this.
> > > >
> > > > >
> > > > >
> > > > > I would like to try WCS Image pyramidal plugin.
> > > > > What is the difference between pyramidal images and gdaladdo -d
> images?
> > > > >
> > > >
> > > > The ImagePyramid plugin is thought for being used with multiple mosaic
> > > > at different levels of resolutions.
> > > >
> > > >
> > > > > What file should I give in WCS Image pyramidal plugin (shapefile
> like
> > > > > mosaicking plugin or it supports only one file)?
> > > > >
> > > > >
> > > >
> > > > Please, have a look at the example data provided with geotools. Anyway
> > > > the informations you need to provide are roughly explained in the
> > > > javadoc of the Imagepyramidreader, I am reporting them here for
> > > > simplicity:
> > > >
> > > > This reader is repsonsible for providing access to a pyramid of
> > > > mosaics of georeferenced coverages that are read directly through
> > > > imageio readers, like tiff, pngs, etc...
> > > >
> > > > Specifically this plugin relies on the image mosaic plugin to handle
> > > > each single level of resolutions avaible, hence all the magic is done
> > > > inside the mosaic plugin.
> > > >
> > > > For information on how to build a mosaic, please refere to the
> > > > ImageMosaicReader documentation.
> > > >
> > > > If you are looking for information on how to create a pyramid, here
> > > > you go. The pyramid itself does no magic. All the magic is performed
> > > > by the single mosaic readers that are polled depending on the requeste
> > > > resolution levels. Therefore the first step is having a mosaic of
> > > > images like geotiff, tiff, jpeg, or png which is going to be the base
> > > > for te pyramid.
> > > >
> > > > The second step is to build the next (lower resolution) levels for the
> > > pyramid.
> > > > If you look inside the spike dire of the geotools project you will
> > > > find a (growing) set of tools that can be used for doing processing on
> > > > coverages.
> > > > Specifically there is one tool called PyramidBuilder that can be used
> > > > to build the pyramid level by level.
> > > >
> > > > Last step is providing a prj file with the projection of the pyramid
> > > > (btw all the levels has to be in the same projection) as well as a
> > > > properties file with this structure:
> > > >
> > > > #
> > > > #Mon Aug 21 22:23:27 CEST 2006
> > > > #name of the coverage
> > > > Name=ikonos
> > > > #different resolution levels available in each mosaic
> > > > Levels=1.2218682749859724E-5,9.220132503102996E-6
> > > > 2.4428817977683634E-5,1.844026500620314E-5
> > > > 4.8840552865873626E-5,3.686350299024973E-5
> > > > 9.781791400307775E-5,7.372700598049946E-5
> > > > 1.956358280061555E-4 ,1.4786360643866836E-4
> > > > 3.901787184256844E-4,2.9572721287731037E-4
> > > > #where all the levels reside
> > > > LevelsDirs=0 2 4 8 16 32
> > > > #number of levels availaible
> > > > LevelsNum=5
> > > > #envelope for this pyramid
> > > > Envelope2D= 13.398228477973406,43.591366397808976
> > > > 13.537912459169803,43.67121274528585
> > > >
> > > >
> > > >
> > > >
> > > > > I got a coveragetool link
> > > > >
> > >
> http://svn.geotools.org/geotools/branches/2.3.x/ext/coverage_development/coveragetools/
> > > > > from Alessio, but I dont know how to use those command tools. (Im
> not
> > > > > familiar with java developing)
> > > > >
> > > > >
> > > > > Please help me to answer these questions.
> > > > >
> > > >
> > > > I hope this will help to get ou started.
> > > >
> > > >
> > > > Regards,
> > > > Simone.
> > > > > Sándor
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > >
> -------------------------------------------------------
> > > > Eng. Simone Giannecchini
> > > > President /CEO GeoSolutions
> > > >
> > > > http://www.geo-solutions.it
> > > >
> > > >
> -------------------------------------------------------
> > > >
> > > >
> > >
> -------------------------------------------------------------------------
> > > > Using Tomcat but need to do more? Need to support web services,
> security?
> > > > Get stuff done quickly with pre-integrated technology to make your job
> > > easier
> > > > Download IBM WebSphere Application Server v.1.0.1 based on Apache
> Geronimo
> > > >
> > >
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > > _______________________________________________
> > > > Geotools-devel mailing list
> > > > [email protected]
> > > >
> > >
> https://lists.sourceforge.net/lists/listinfo/geotools-devel
> > > >
> > >
> > >
> >
> >
> > --
> > -------------------------------------------------------
> > Eng. Simone Giannecchini
> > President /CEO GeoSolutions
> >
> > http://www.geo-solutions.it
> >
> > -------------------------------------------------------
> >
>
>
--
-------------------------------------------------------
Eng. Simone Giannecchini
President /CEO GeoSolutions
http://www.geo-solutions.it
-------------------------------------------------------
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