[postgis-users] Rasters

[Paul Ramsey]

OK, raster people.  My problem is that I cannot envision the use  
cases for raster in the database, so, make it easy for me! :)

- What is the atomic unit of storage for rasters in the database?  Is  
it complete scenes?  Something else?
- What is some SQL I would apply against my raster tables?  Make up  
some descriptive function names and show me some example SQL and tell  
me what it does.
- How do vector data and raster data interact?  Note the atomicity  
question above.

P.