Book excerpt: 'Geographical information science' is not merely a technical subject but also poses theoretical questions on the nature of geographic representation and whether there exist limits on the ability of GI systems to deal with certain objects and issues. This book presents the debate surrounding technical GIS and theory of representation from an 'inside' GIS perspective. Chapters are authored by leading researchers from a range of fields including geographers, planners, ecologists and computer scientists from Europe and North America.