Image Pyramid Plugin

There are a series of interesting raster “formats” that make use of a bunch of raster files and present the result as a single image. This format uses a magic directory structure combined with a property file describing what goes where.

Reference

• ImagePyramidReader

• Mosaic Plugin

• http://docs.geoserver.org/stable/en/user/data/imagepyramid.html

• http://docs.geoserver.org/stable/en/user/tutorials/imagepyramid/imagepyramid.html?highlight=bluemarble

Maven:

<dependency>
  <groupId>org.geotools</groupId>
  <artifactId>gt-gt-imagepyramid</artifactId>
  <version>${geotools.version}</version>
</dependency>

Example

On disk an image pyramid is going to look a bit like the following (you can use any format for the tiles from MRSid to tiff):

directory/
directory/pyramid.properties
directory/0/mosaic metadata files
directory/0/mosaic_file_0.tiff
directory/0/...
directory/0/mosiac_file_n.tiff
directory/...
directory/0/32/mosaic metadata files
directory/0/32/mosaic_file_0.tiff
directory/0/32/...
directory/0/32/mosiac_file_n.tiff

The format of that pyramid.properties file is magic, while we can look at the javadocs (and the following example), you are going to have to read the source code on this one:

# Pyramid Description
#
# 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 available
LevelsNum=6

#envelope for this pyramid
GeneralBounds=13.398228477973406,43.591366397808976 13.537912459169803,43.67121274528585