Dear list,

I'm creating an image pyramid for the usage in Geoserver with the image pyramid 
plugin. Beside the granule index I need a footprint to clip the granules by 
geometry. Per default image mosaics/pyramids in Geoserver are using shape files 
for the granule index and footprints. I want to store both due to performance 
issues and data handling within PostgreSQL/PostGIS. 

So far I could manage this for the granule index using a datasource.properties 
file within each level mosaic directory. Unfortunately this doesn't work for 
the footprints. There is a possibility to define a footprints.properties file, 
but as far as I can see it is only possible to set shape or WKT sources for the 
footprints. I could not find any further detailed documentation for the 
footprints.

Currently I'm having a granule index in PostGIS and a footprint as shape. This 
feels very awkward and I think this might not be very performant when coming to 
lots of granules. 

So my question is: Is it possible to store the footpints for an image 
mosaic/pyramid within PostGIS? If not, are there better approaches for clipping 
(usage of NODATA is not possible)?

Kind regards, 

Dirk



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