Different approaches are used for positioning of mobile users and all of them have advantages and disadvantages. The Global Positioning System (GPS) offers the easiest and most accurate 3D positioning of the user but it is not operational indoors. The positioning within mobile networks (using only the information related to the base network transmitter) could be made available everywhere but it...

We introduce a novel approach for describing sensors and their capabilities. Although existing standards for describing sensors and their capabilities as well as their measurements, produced by Open Geospatial Consortium’s Sensor Web Enablement activities (OGC SWE), achieve syntactic interoperability, they do not provide facilities for computer logic and reasoning. We argue that ontologies are ...

This article describes a research project that realised a national standard for 3D geo-information. The standard was developed as part of a pilot in which more than 65 private, public and scientific organisations collaborated to analyse and push 3D developments in the Netherlands (run between March 2010 and June 2011). The 3D standard was established through several steps. Firstly a comparison ...

The Sensor Planning Service (SPS) is service model to define the web service interface for requesting user driven acquisitions and observation. It’s defined by the Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) group to provide standardized interface for tasking sensors to allow to defining, checking, modifying and cancelling tasks of sensor and sensor data. The goal of Sensor Pla...

For any large-scale distributed system, both communication and data management distill down to the problem of resource discovery. Similarly, the geoweb needs a resource discovery service for users to find the relevant web services that providing data of interest. The Open GIS Consortium (OGC) recommends tackling the question by using Web Catalog Service (CS/W). However, the system provides only...

Abstract Background Upper gastrointestinal white light endoscopy is the most used procedure for assessing upper tract condition and identification of various types lesions. The characteristics lesions may influence subsequent treatment steps. Among these characteristics, size a lesion plays crucial role in determining surveillance interval, appropriate resection method predicting risk malignanc...

Enormous quantities of trajectory data are collected from many sources, as GPS devices and mobile phones, as sequences of points. These data can be used in many application domains such as traffic management, urban planing, tourism, and bird migration. However, in most applications a higher level of abstraction should be used instead of sample points. In this paper we present an extension of th...

Earth observation (EO) and simulation data share some core characteristics: they resemble raster data of some spatio-temporal dimensionality; the complete objects are extremely large, well into Teraand Petabyte volumes; data generation and retrieval follow very different access patterns. EO time series additionally share that acquisition/generation happens in time slices. The central standardiz...

Remotely sensed satellite data can provide spatial and temporal coverage for global environmental monitoring. Calibration and validation are very important for more accurate satellite products and can contribute to the detection of climate changes on earth. Calibration and validation of satellite products normally use both ground-based and satellite-based data, which have geospatial metainforma...