[Geoserver-users] pyramid.properties file structure

GeoServer GeoServer User
1

Hi,

Currently I am using UMN Mapserver to display many GB in size images within a pyramid structure that I generate via my own java application which calls varies gdal utilities (like gdalinfo, gdalwarp, gdal_translate and gdaltindex) . I would like to be able to take pyramid data which has layers by varying resolution including the geotiff’s and the shape file at each resolution which references its resolution geotiff.

From the geoserver documentation I have noticed that under Image Pyramidal Plugin you enter the name of the pyramid.properties file (which I don’t have) at the root of the pyramid structure that was generated.

Is their documentation on the correct format for the pyramid.properties file, so that I can set up the pyramid.properties file to reference my already created pyramid geotiffs and shapefiles, and then display it within Geoserver?

Thanks,

–
John J. Mitchell

2

John Mitchell ha scritto:

Hi,

Is their documentation on the correct format for the
pyramid.propertiesfile, so that I can set up the
pyramid.properties file to reference my already created pyramid geotiffs and
shapefiles, and then display it within Geoserver?

Documentation is rather scarce, but anyways, there's something in the pyramid reader javadocs:

------------------------------------------------------------------

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
            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=6
            #envelope for this pyramid
            Envelope2D=13.398228477973406,43.591366397808976 13.537912459169803,43.67121274528585

---------------------------------------------------------------------

So, to make things work you'll also have to set up properly
the property files for each mosaic. Information on how to
setup the property file for image mosaic is here:

http://docs.codehaus.org/display/GEOSDOC/Using+the+ImageMosaic+plugin

Hope this helps. Let me know if you succeed.
Cheers
Andrea