The use of Geographic Information Systems (GIS), by community based organisations in society is an important phenomenon to study. This book examines in detail the design and implementation of Public Participation GIS (PPGIS) in Dublin, Ireland and New Orleans, Louisiana. This book spans several years of regular observations of local residents and workers in Community Based Organizations (CBOs) engaged in community development activities and initiatives involving Grassroots GIS . Public Participation Geographic Information Systems have the potential to affect positive change in the flow of...