Earth observation data has increased considerably over the last decades with satellite sensors collecting and transmitting back to Earth several terabytes of data per day. This data acquisition rate is a major challenge to existing data management, exploitation and dissemination approaches used by various agencies such as ESA, NASA and European national space agencies. To make the available petabytes of EO data easily accessible by an even larger group of end user applications, TELEIOS has designed and implemented technologies for developing Virtual Earth Observatories. When deployed in an EO data center, Virtual Earth Observatories enable satellite data together with other kinds of external data (e.g., maps or information from the Web) to be combined, to extract knowledge that is the basis for the development of applications targeting EO scientists, decision makers and the general public. Virtual Earth Observatories are built using the following state of the art technologies pioneered by the TELEIOS consortium:
Ontologies and linked geospatial and temporal data
Array database and data vault technologies
Knowledge discovery techniques for satellite data
Visual user interfaces
The TELEIOS advances to the state of the art have been demonstrated in two use cases:
A Virtual Earth Observatory for the TerraSAR-X archive of DLR. In this use case, more than 100 scenes (around 1TB of data) from the TerraSAR-X archive, covering various areas of the Earth, have been processed and, as a result, more than 800 semantic classes (e.g., bridges, roads, forests, lakes, etc.) have been detected with high precision and recall. This Virtual Earth Observatory has been used to demonstrate how to develop a new generation of semantic catalogues for TerraSAR-X data, and how to improve current rapid mapping techniques in emergency and disaster scenarios.
Wildfire monitoring and burnt scar mapping based on satellite images and relevant geospatial data. In this use case, the National Observatory of Athens used TELEIOS technologies to re-engineer its real-time wildfire monitoring and burnt scar mapping services that have been developed in the context of previous GMES projects. Both services are now operational and are actively been used in cases of forest fire emergency scenarios in Greece.
TELEIOS technologies have been benchmarked using extremely large datasets (billions of triples of linked geospatial and temporal data, terabytes of satellite images) and shown to outperform their competitors.
With the support of the European Space Agency, EO scientists have been involved in TELEIOS throughout its entire life-time, from requirements definition, through development to testing and validation, thus making sure that our results have a lasting impact in the EO community.
TELEIOS has ended successfully in August 2013. The following short video summarizes its achievements.
More detailed information on the scientific and technological contributions of TELEIOS can be found by clicking on any of the buttons below.