In its traditional meaning, Public Participation GIS (PPGIS) seeks to involve and empower segments of society that are traditionally marginalized from the decision making process concerning issues related to place (McCall, 2004). This is done by supporting the creation and analysis of various types of spatial data as well as the shared access to these data. In this context PPGIS is seen as a vehicle for supporting better planning practices aimed at social justice, equal service and, more generally, for improving the quality of life (Yaakup et al., 2004). It is commonly understood that PPGIS requires technical solutions that focus on properties such as broad acquisition and ease of use (Haklay & Tobon, 2003).