Backgrounds: The aim of this research is development of an online conference system that supports collaborative works on planetary missions. This system has an applicability on collaborative analysis of planetary remote sensing data, and productions of thematic maps from these data by researchers remotely placed at their own home institutes. Many lunar explorations are planned to be launch in a...

Research in map generalization starts to focus on other types of maps than on topographic maps only. Therefore, new generalization concepts have to be developed, extending on the experiences and research efforts originally made in topographic generalization. This paper presents a new conceptual framework of map generalization with respect to thematic mapping based on an analysis of the literatu...

Research on the effectiveness of concept maps on learning has long being neglecting three critical issues; i.e., the schematically structured maps, learners’ perceptions of the maps, and the various ways of presenting concept structures. When concepts are associated by logical or causal rather than by subsumption relations, variations in selecting concepts and describing their relations may pre...

Noise annotation lines are a promising technique to visualize thematic uncertainty in maps. However, their potential has not yet been evaluated in user studies. In two experiments we assessed the usability of this technique with respect to a different number of uncertainty levels as well as the influence of two design aspects of noise annotation lines: the grain and the width of the noise grid....

In remote sensing, thematic map comparison is often undertaken on a per-pixel basis and based upon measures of classification agreement. Here, the degree of agreement between two thematic maps, and so the difference between the pair, was evaluated through visual and quantitative analyses for two scenarios. Quantitative assessments were based on basic site-specific measures of agreement that are...

The risk of flooding due to runoff is a major concern in many areas around the globe and especially in Romania. The modern management of spatial data related of river flooding largely relies on the functional facilities supplied by the Geographic Information System (GIS) info-layers, combined with Earth Observation (EO) data-derived information, Digital Elevation Models (DEM) and hydrological m...

The thematic and citation structures of Data and Knowledge Engineering (DKE) (1985–2007) are identified based on text analysis and citation analysis of the bibliographic records of full papers published in the journal. Temporal patterns are identified by detecting abrupt increases of frequencies of noun phrases extracted from titles and abstracts of DKE papers over time. Conceptual structures o...

The first major atlas ofworldwide thematic maps was completed in 1848, consisting of some 90 maps in two volumes. Created by Heinrich Berghaus at the Geographische Kunstschule in Potsdam, the Physikalischer Atlas (Physical Atlas) reflected the intense interest and activity in mapping a wide range of natural phenomena in the first part of the nineteenth century. The intent of this essay is to co...

The quality of remotely sensed land use and land cover (LULC) maps is affected by the accuracy of image data classifications. Various efforts have been made in advancing supervised or unsupervised classification methods to increase the repeatability and accuracy of LULC mapping. This study incorporates a data-assisted labeling approach (DALA) into the unsupervised classification of remotely sen...

This study aims to provide trypanosomiasis-affected countries with standardized datasets and methodologies for mapping the habitat of the tsetse fly (Glossina spp., the disease vector) by customizing and integrating state-of-the-art land cover maps on different spatial scales. Using a combination of inductive and deductive approaches, land cover and fly distribution maps are analysed in a geogr...