This paper proposes an algorithm for simplifying point features on maps based on the multiplicatively weighted Voronoi diagram (MWVD). To ensure statistical, thematic, metric, and topological information contained in the original point features can be transmitted correctly after simplification, the algorithm selects corresponding measures to quantify these four types of information, and integra...

We present SexTant, a Web-based system for the visualization and exploration of time-evolving linked geospatial data and the creation, sharing, and collaborative editing of “temporally-enriched” thematic maps which are produced by combining different sources of such data.

In this paper, fuzzy-based multisensor data fusion is studied and an iterative fuzzy classifier is proposed. Obtained results are given as a set of two maps: a thematic map, and a confidence map (a classification certainty map representing the degree of certainty in the thematic map). The application of this classifier using ERS-1/JERS-1 SAR composites is shown to very promising.

This study presents a method used for predicting the air temperature distribution in an urbanized area from the surface temperature of trees. A strong trend of urbanization can be observed whole over the world (United Nations Centre for Human Settlement, 1996). It is well known and documented that urbanization can have significant effects on local weather and climate (Landsberg, 1981). One of t...

In many textual repositories, documents are organized in a hierarchy of categories to support a thematic search by browsing topics of interests. In this paper we present a novel approach for automatic classification of documents into a hierarchy of categories that works in the transductive setting and exploits relevant example selection. While resorting to the transductive learning setting perm...

In many textual repositories, documents are organized in a hierarchy of categories to support a thematic search by browsing topics of interests. In this paper we present a novel approach for automatic classification of documents into a hierarchy of categories that works in the transductive setting and exploits relevant example selection. While the transductive learning setting permits to classi...

In this paper we examine the visualisation of multiple variables in thematic maps by using the third dimension. Three cases illustrate the potentials and limitations for three-dimensional visualisations of multivariate datasets. After examining these examples, we reflect what should be considered carefully when creating this kind of maps. Maps making use of the third dimension can help to visua...