ABSTRACT

Current geographical information systems GIS deal almost exclusively with well-defined, static geographical objects ranging from physical landscapes to towns and transport systems. Such objects, exactly located in space, can easily be handled by modern GIS, yet form only a small proportion of all the possible geographical objects.; This book challenges the assumption that the world is compsed of exactly defined and bounded geographic objects such as land parcels, rivers and countries. ignoring the essential complexity of the world, current GIS do not adequately address problems as diverse as the resolution of crime between national boundaries, or the interpretation of views of people from different cultures. This work, bringing together a range of specialists from fields such as linguistics, computer science, land surveying, cartography and soil science, examines current research into the challenges of dealing with geographical phenomena that cannot easily be forced into one of the two current standard data models.

part One|40 pages

Introductions by the Editors

part Two|54 pages

Objects versus Fields: Contrast in Concepts

part Three|58 pages

Languages to Describe Shape

part Four|35 pages

Qualitative Topological Relations and Indeterminate Boundaries

part Five|82 pages

Data Models for Indeterminate Objects and Fields

part Six|61 pages

Practical Issues of Dealing with Objects with Indeterminate Boundaries

chapter Chapter Twenty|14 pages

How Many Lakes, Islands and Rivers are there in Finland?

A Case Study of Fuzziness in the Extent and Identity of Geographic Objects

chapter Chapter Twentry One|11 pages

Geoscience Modelling: From Continuous Fields to Entities

chapter Chapter Twenty Two|7 pages

Geographic Objects, and How to Avoid Them

part Seven|5 pages

Postscript