Transmitting Vector Geospatial Data across the Internet
GIScience '02 Proceedings of the Second International Conference on Geographic Information Science
Spatial Data on the Web: Modeling and Management
Spatial Data on the Web: Modeling and Management
Spatial Factors Affecting User's Perception in Map Simplification: An Empirical Analysis
W2GIS '08 Proceedings of the 8th International Symposium on Web and Wireless Geographical Information Systems
An increment based model for multi-resolution geodata management in a mobile system
W2GIS'05 Proceedings of the 5th international conference on Web and Wireless Geographical Information Systems
Efficiently generating multiple representations for web mapping
W2GIS'05 Proceedings of the 5th international conference on Web and Wireless Geographical Information Systems
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In many daily real problems it is necessary to exchange spatial data over the network and visualize them as soon and with higher quality as possible. Unfortunately, this is not always possible. As an instance, in case of event when slow or obstructed communication lines may make exchange of information difficult or even impossible. In order to mitigate this issue, an approach is sending data in a progressive way by generating simplified versions of the map and then, transmitting the coarsest map and then adding refinements passing through intermediate versions until reaching an acceptable detail. However, choosing the first and the subsequent versions is a complex problem and designers are often let to decide on a case-by-case basis. In this paper, we present a three step schema for generating simplified versions which is based on an empirical experiment whose aim is to determine which reduction levels can be applied by analyzing the perception of map changes with respect to the original map.