Spatial and geographic data and the information systems which handle them are a major IT growth area for the 21st century. This book assembles the work of a number of leading researchers concerned with developing new models for describing, analysing and visualising such data. The authors address themes in data modelling, data error management, remote sensing techniques, neural networks, agent-based systems, generalisation, interactive cartography and networked decision support systems.The collection provides an exciting and authoritative selection of work occuring at the forefront of GIS and spatial data handling.