Hi, I think WMS spec gives a chance to define SRS by public URL of file with definition of SRS. I don't know if MapServer supports this. Tomas -- Tomas Novotny, tomas.novotny at tmapy.cz T-MAPY spol. s r.o., Nezvalova 850, 500 03 Hradec Kralove, Czech Republic, phone: + 420 49 5513335 , fax + 420 49 5513371