MAP GENERALIZATION FOR OSMASTERMAP DATA IN LOCATION BASED SERVICES & MOBILE GIS APPLICATIONS

Abstract

This paper looks at how previous solutions to graphic conflict reduction can be adapted and applied to production of schematic maps suitable for MobileGIS applications. Map generalization is the process by which small scale maps are to be derived from large scale maps. With the advent of high-end miniature technology as well as digital geographic data products like OSMasterMap it is essential to devise proper methodologies for map generalization specifically tailored for mobile GIS applications. This paper is concerned with the problem of producing schematic maps suitable for rendering on Mobile GIS display devices (e.g. PDAs). Schematic maps are a diagrammatic representation based on linear abstractions of networks. Transportation networks are the key candidates for applying schematization to help ease the interpretation of information by the process of cartographic abstraction. Schematic maps are built-up from sketches which usually have a close resemblance to verbal descriptions about spatial features. It is desirable to devise suitable generalization techniques for generating schematic maps from large scale datasets for display on small display devices to be used for Mobile GIS applications.

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