Many thanks Emmanuel, i've found why my symbols was'nt working : my mapfile was lacking the SYMBOLSCALE parameter... Best regards, Laurent -- Laurent Jégou IGE Cartographe UTM - Dépt. Géographie 31058 TOULOUSE Cedex 9 - 05.61.50.43.89 http://www.univ-tlse2.fr/geoprdc http://www.geotests.net/blog