Semi-Automatic Semantic Data Classification Expert System to Produce Thematic Maps

Abstract

This chapter presents an expert system, designed to classify semantic information in a geo‐ graphic database, aiming to assist non-expert map-makers. Despite the fact that GIS science has been discussing how to deal with ordinary users and their relationship with map pro‐ duction, especially due to the popularization of GIS (Geographic Information Systems) soft‐ ware and webmapping technologies, there are still issues concerning map production and its quality. Some of these issues are related to data classification methods, knowledge about levels of measurement and, thus, to map symbolization itself. In Brazil, this subject can be of special interest to municipality and state government departments, NGOs and institutions which use maps for planning and for decision-making support. At least in part, problems seem to occur because of the ease of GIS use, together with employees’ lack of education in cartography. In this context, an expert system seems to be a proper choice to ensure that or‐ dinary users can take correct decisions in the map-making process.