Some key points: - Facilitating GIS supports communication processes by making geographic data viewable, while participatory GIS removes expert dependence by empowering public participation. - Moving from facilitating to participatory involves sharing responsibilities between experts and the public regarding decisions that impact the living environment. - Benefits of participatory GIS include more transparency, public influence, involvement and satisfaction, while risks include potential information overload, loss of interest, misinterpretations and high costs. Success requires focus on communication, collaboration support and user-friendly tools.