Read e-book online Map-based Mobile Services: Theories, Methods and PDF

By Liqiu Meng, Alexander Zipf, Tumasch Reichenbacher

The booklet is split into 3 elements: concept, process and implementation. beginning with a precis of the cutting-edge in cellular applied sciences, the 1st half analyses their affects on cartography and pinpoints the lacking theories interested in the advance of map-based cellular prone. A conceptual framework of cellular cartography is then brought with the emphasis on cellular utilization context. the second one half is dedicated to the layout method less than the limitations outlined within the theoretical framework. A middle factor offers with customized cellular map companies. the ultimate half demonstrates the feasibility of the equipment through the use of program situations. The accompanying CD-ROM comprises the PDF-Files in color.

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The artefacts’ mediating role is emphasised in following remark: “If we want to study artefacts, we cannot study them as things, we need to look how they mediate use. Artefacts are not just means for individuals, they also carry with them certain ways of sharing and dividing work. ” (Bannon and Bodker 1991). Activities always take place in a certain situation with a specific context. This context influences an activity as an exterior frame. Engeström (1987) formulated activity context as a network of different parameters that influence each other.

One of the commonly used solutions is the empirically determined “radical law” of Töpfer and 2 Portrayal and Generalisation of Point Maps for Mobile Information Services 27 Pillewizer (1966). g. g. by trying to squeeze more features into the map than it ideally has capacity for. A model of geographic space can help to mediate between these two situations. e. the density of information. Carto(graphical) generalisation will make modifications to the overall structure of spatial variation on account of symbolisation conflicts, however it needs to be particularly concerned with the second order structure of spatial variation or spatial arrangement.

2003): Missing theories and methods in digital cartography. , Proceedings on CD-ROM. Molenaar, M. (1998): An introduction to the theory of spatial object modeling for GIS. London: Taylor & Francis. -C. (1979): Perception of Continuously Shaded Maps. Annals of the Association of American Geographers, Vol. 69, No. 2, pp. 240-249. Mustière, S. and Moulin, B. (2002): What is Spatial Context in Cartographic Generalisation?. IAPRS & SIS, Geospatial Theory, processing and Applications, Vol. 34, No. 4, Ottawa, Canada, 8-12 July, pp.

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