sentences:  GIS-based maps and spatial analysis become major conduits in the process.A good PGIS practice is embedded into long-lasting spatial decision-making processes, is flexible, adapts to different socio-cultural and bio-physical environments, depends on multidisciplinary facilitation and skills and builds essentially on visual language.The practice integrates several tools and methods whilst often relying on the combination of 'expert' skills with socially differentiated local knowledge.