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Towards Extending Web Map Services for Mobile Applications

This paper begins with describing a case study of using the standard Web Map Services (WMS; from Open Geospatial Consortium) for mobile applications. The WMS client was tested in Lund using cartographic data at a scale of 1:10 000. From a map generalisation perspective, two experiences were gained from this case study: the screen map often has too little/much information and the communication can break down due to too large file sizes. The main part of this paper is devoted to these two issues. Firstly, a usability study of the amount of map information is presented. The result from this study indicates that we should not only consider scale when determining generalisation level, but also information density. Secondly, the paper contains a short discussion about methods to restrict map file sizes using WMS.