Facilitating the Handling of Interactive Atlases by Dynamic Grouping of Functions - The Example of "Smart Legend" -- A User-defined Virtual Reality Chart for Track Control Navigation and Hydrographic Data Acquisition -- Mechanisms on Graphical Core Variables in the Design of Cartographic 3D City Presentations -- An Egocentric Urban Viewshed: A Method for Landmark Visibility Mapping for Pedestrian Location Based Services -- A Multi-scale Dynamic Map Using Cartograms to Reflect User Focus -- Exploring Tessellation Metaphors in the Display of Geographical Uncertainty -- Simulation and Representation of the Positional Errors of Boundary and Interior Regions in Maps -- Global Morphometric Maps of Mars, Venus, and the Moon -- Scalability of Techniques for Online Geographic Visualization of Web Site Hits -- Afterword. This book contains selected papers from participants at the 4th National Cartographic Conference GeoCart'2008, held in Auckland, New Zealand in September 2008. It provides a contribution to the literature related to contemporary Geoinformation and Cartography as part of the Springer - ries "Lecture Notes in Geoinformation and Cartography". The series aims to provide publications that highlight the research and professional acti- ties taking place in this exciting discipline area. Books published thus far cover a wide range of topics and their content reflects the diverse nature of interests of contributors in the field. The GeoCart conferences are held every two years and attract attendees from Australasia and globally. They offer a forum for reflecting on past practices, exploring future possibilities and reporting on the findings of - search undertakings. They make valuable contributions to the theory and praxis of Geoinformation and Cartography. The editors of this book, Antoni Moore, from the University of Otago, and Igor Drecki, from the University of Auckland, have provided contri- tions that fall under the categories of representation, egocentric mapping, the exploration of tangible and intangible geographical phenomena by v- ual means and Web mapping. The chapters provide valuable information from contributors that illustrate the exciting developments in the dis- pline. I applaud the efforts of the editors and authors for providing this work as an insight into their fields of activity. I hope that you find this book, from the land of the Long White Cloud, a valuable resource.