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Technological development in the field of map and spatial database generalization is very fast, following the trend from manual cartography to computer-based cartography. Map generalization is an integral part of spatial data collection, representation and access. Most generalization algorithms developed and employed by the GIS industry and the computer(More)
Research and development of mapping software for the past three decades was not enough to provide the GIS community with reliable and robust computer generalization tools that can compete with cartographers. Much more still remains to be done in generalizing areal and linear features (e.g. vegetations, buildings and roads) in order to create maps at(More)
For the automation of the map generalization process, it is necessary to integrate cartographers' experience with the generalization operations within Geographical Information Systems (GIS). This paper provides a brief discussion on Expert System (ES) and its application in GIS with a particular emphasis on automation of map generalization. The discussion(More)
Generalisation of both raster and vector data is one of the challenging tasks for cartographers. It is particularly difficult to automatically generalise raster thematic maps derived from remotely sensed data. This paper aims to overview the past and current developments in generalisation of raster data and to present the authors' efforts in developing a(More)
1.0 BACKGROUND The problem of deriving a range of map scales from a common database is considered an interesting and challenging area of research and development in today's map production environment. Technological developments in dynamic cartographic generalisation applications (e.g. mobile mapping, vehicle navigation) call for a robust, practical and(More)
This paper review past and current research activity in the area of generalisation of spatial data and presents a new methodological framework for segmentation and generalisation of raster data. In order to overcome drawbacks associated with supervised classification and generalisation of raster data, an Interactive Automated Segmentation and Raster(More)
This paper presents a generalization methodology to derive multi-scale GEODATA through an evaluation of ESRI ArcGIS™ software that was used as a testbed based on the principles of generalization. It focuses on integration and utilization of generalization operators in order to generalize a road network database and produce small scale maps at 1:500 000 and(More)
This paper aims to report on the process of acquiring knowledge by undertaking a Cartographic Generalisation Survey. From November 2005 to May 2006, a survey of cartographic generalisation practices was conducted at several National Mapping Agencies (NMAs), state mapping agencies and a number of software vendors, in order to capture the cartographers'(More)
Current map production systems provide reasonably complex tools and procedural cartographic protocols, however, cartographers' interactions are essential for selecting information, symbolizing features, maintaining topological relationships, and visualizing graphical conflicts. Although an efficient generalization technique would improve the graphical(More)