Visualizations of space, time, and agents (or objects) are ubiquitous in science, business, and everyday life, from weather maps to scheduling meetings. Effective communications, including visual ones, emerge from use in the field, but no conventional visualization form has yet emerged for this confluence of information. The real-world spiral of production, comprehension, and use that fine-tune...

Topic Maps are means for representing sophisticated, conceptual indexes of any information collection for the purpose of semantic information integration. To properly fulfil this purpose, the generation of Topic Maps has to base on a solid theory. This paper proposes the Observation Principle as the theoretical fundament of a future scientific discipline Topic Maps Engineering. SemanticTalk gen...

In dieser Untersuchung werden die drei Lokalen Suchmaschinen Google Maps, Bing Maps und TOnline Maps in einem kombinierten Eye-Trackingund Usability-Test verglichen. Es zeigen sich sowohl Probleme bei der Benutzung einzelner Suchmaschinen als auch übergreifende Ergebnisse, die für die Gestaltung von kartenbasierten Suchmaschinen relevant sind. Wir geben Empfehlungen für die Gestaltung solcher S...

We present a mobile robot localization method using a stereo camera only. Vision-based localization in outdoor environments is still challenging issue because of large illumination changes. To cope with varying illumination conditions, we use 2D occupancy grid maps generated from 3D point clouds obtained by a stereo camera. Furthermore, we incorporate salient line segments extracted from the gr...

In this paper we focus on the modeling and evaluation of next generation satellite communications technologies to support future aeronautical communications. Recent studies has identified the delivery of real-time high resolution weather maps to the cockpit as an important future aeronautical application. Focusing on this application, we investigate the use of Lowand GeosynchronousEarth Orbit (...

We describe radar measurements of waves, currents and winds made on the coast of northern Scotland during two 2013/14 winter storms, giving methods, results and interpretation. Wave parameters (height, period, direction and short-wave/wind direction) were derived and compared with measurements made by a neighboring buoy and local weather stations. Wind direction and current velocity maps were p...

Space borne radar data facilitates continuous monitoring of almost any location on the earth (limitations in polar zones) with quite low costs. Almost weather-independent operation of radar systems enables a reliable and continuous record of data from earth’s surface. In the framework of an ESA pilot project (AO335), ENVISAT polarimetric SAR data of years 2004 and 2005 are examined for their us...

The availability of a dense time series of satellite observations at moderate (30 m) spatial resolution is enabling unprecedented opportunities for understanding ecosystems around the world. A time series of data from Landsat was used to generate a series of three maps at decadal time step to show how surface water has changed from 1991 to 2011 in the high northern latitudes of North America. P...

Classification is a supervised learning approach, which maps a data item into predefined classes. There are various classification algorithms proposed in the literature. In this paper authors have used four classification algorithms such as J48, Random Forest (RF), Reduce Error Pruning (REP) and Logistic Model Tree (LMT) to classify the "WEATHER NOMINAL" open source Data Set. Waikato ...

Soil moisture is a key parameter controlling the exchanges at the surface/atmosphere interface. This parameter, very important for the weather and climate modelling, is not well monitored at a global scale. Because of its high spatial variability, a large number of point measurements is necessary to estimate an accurate value over an area. The SMOS (Soil Moisture and Ocean Salinity) mission was...