Preparing a pyramid for the GeoServer with GDAL retile utility

Ciao a tutti,

since we have been asked many times how we configure pyramids for serving them with the GeoServer 2.0 I decided to extract a few slides from our training materials that deals with this topic.
The slides below are released under the Creative Commons terms.
A few annotations:
  1. use fwtools prebuilt binaries for the GDAL utilities
  2. make sure your data has proper CRS with an EPSG Code as well as proper georefering by inspecting it prior to preprocessing using the gdalinfo utility
  3. this tutorial target GeoServer 2.0 and onward