[gdal-dev] How robust is OGRSpatialReference::GetAuthorityCode?

[David Strip]

How well does OGRSpatialReference::GetAuthorityCode perform in the wild 
when handed a WKT? In particular, if I have satellite imagery from 
someplace in the world that was ortho-rectified in a "sane" manner to a 
national or state projection with an conforming WKT, will this function 
return an EPSG value?  (I realize "robust" is somewhat ill-defined, but 
this is the best I could come up with in terms of my question. Sorry).