- Is it possible to define a custom projection in my PostGis database?
Yes, it is. See Custom projection definition in PostGis in the
Hints and Tricks section.
- Is it possible to define a projection with custom parameters in Geoserver?
Yes, it is, although quite tricky ever since the move to an HSQL database for storing projection information. See Custom projection definition in Geoserver in the
Hints and Tricks section.