Which are the additional functionalities of POSTGIS compared to postgreSQL? are there additional geometrical types, operators and functions ? which are there ? thanks for your help Institut de Biotechnologie des Plantes Université Paris Sud XI MOLINET S. tél 01 69 15 33 85 fax 01 69 15 34 25 molinet at ibp.u-psud.fr www.ibp.u-psud.fr