Big, Linked and Open Earth Observation Data: the Projects TELEIOS and LEO

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1 Big, Linked and Open Earth Observation Data: the Projects TELEIOS and LEO Manolis Koubarakis Charalampos Nikolaou HELLENIC REPUBLIC National and Kapodistrian University of Athens

2 Introduction TELEIOS: a STREP project funded under the 5th call of FP7/ICT (Strategic Objective: Intelligent Information Management). Managed by: DG CONNECT, Data Value Chain Unit G3 Duration: September 2010 August 2013 Consortium: LEO: a STREP project funded under the 7th call of FP7/ICT (Strategic Objective: SME initiative on analytics) Managed by: DG CONNECT, Data Value Chain Unit G3 Duration: October 2013 September 2015 Consortium: 2

3 Introduction TELEIOS was the first project internationally to study big, linked and open Earth Observation data. Research Areas: Earth Observation Semantic Web and Linked Data Scientific Databases Application Scenarios: Wildfire monitoring and burn scar mapping Semantic EO catalogues Rapid mapping 3

4 TELEIOS Virtual Earth Observatories Web Portals Rapid Mapping Scientific Database and Semantic Web Technologies Linked Geospatial Data GIS Data Raw Data Semantic Annotations Derived Products Ingestion Ontologies Knowledge Discovery and Data Mining MetadataFeatures Processing Content Cataloguing Extraction Archiving KNOWL- EDGE DATA

5 Main Achievements - EO Developed a knowledge discovery and data mining framework for satellite images and related geospatial data. Applied the knowledge discovery and data mining framework to the TerraSAR-X archive of DLR: Processed 300+ scenes (3TB data) Discovered 850+ semantic categories The resulting Virtual Earth Observatory was used to develop: New generation of semantic catalogues for TerraSAR-X data Rapid mapping applications 5

6 Main Achievements - EO Developed a knowledge discovery and data mining framework for satellite images and related geospatial data. Applied the knowledge discovery and data mining framework to the TerraSAR-X archive of DLR: Processed 300+ scenes (3TB data) Discovered 850+ semantic categories The resulting Virtual Earth Observatory was used to develop: New generation of semantic catalogues for TerraSAR-X data Rapid mapping applications 6

7 Main Achievements - EO (cont d) Developed a new generation of real-time fire monitoring and burn scar mapping services. 7

8 Main Achievements - EO (cont d) Developed a new generation of real-time fire monitoring and burn scar mapping services. 8

9 Background Linked Open Data Goal: to extend the Web with a data commons by publishing various open data sets as RDF on the Web and by setting RDF links between data items from different data sources. Started as a W3C community effort. The LOD community is developing a set of best practices for achieving the above goal. 9

10 Background LOD Cloud 10

11 Main Achievements Semantic Web and Linked Data Developed the data model strdf and the query language stsparql for linked spatiotemporal data. Developed RDF i : a framework for incomplete information in RDF and implemented it for the case of topological information. HELLENIC REPUBLIC National and Kapodistrian University of Athens 11

12 Main Achievements Semantic Web and Linked Data Implemented Strabon, a state-of-the-art geospatial RDF store. WKT GML OPEN SOURCE strdf graphs Query Engine stsparql to SPARQL Translator Strabon Storage Manager Named Graph Translator PostgreSQL PostGIS PostgreSQL Temporal stsparql/ GeoSPARQL queries Parser Optimizer Evaluator Transaction Manager Repository SAIL RDBMS GeneralDB MonetDB Find more about Strabon at HELLENIC REPUBLIC National and Kapodistrian University of Athens 12

13 Main Achievements Semantic Web and Linked Data Our detailed experimental evaluation (with real and simulated data) shows that Strabon is the world's fastest and most functional RDF store. Designed the functional and performance benchmark Geographica for geospatial RDF stores. Find more about Geographica at HELLENIC REPUBLIC National and Kapodistrian University of Athens 13

14 Main Achievements SW and LD (cont d) Developed new ontologies for Earth Observation products: The NOA ontology The DLR ontology See and 14

15 Main Achievements SW and LD (cont d) Developed and published various European linked EO datasets. CORINE land cover Urban Atlas Available on as linked data See also the Greek linked open data portal: 15

16 Main Achievements SW and LD (cont d) Developed Sextant, a Web-based browser and visualizer for linked spatiotemporal data. Find more at: OPEN SOURCE 16

17 Main Achievements SW and LD (cont d) Developed a visual query builder for stsparql and GeoSPARQL. 17

18 Main Achievements Scientific Databases Designed and implemented the query language SciQL in MonetDB. OPEN SOURCE One of the 3 international efforts used as a basis for the ArrayQL standard ( Find more about SciQL at 18

19 Main Achievements Scientific Databases (cont d) Designed and implemented the data vault functionality in MonetDB LRIT/HRIT, GeoTIFF, FITS, mseed and BAM file types can be handled now. OPEN SOURCE Find more about Data Vaults at 19

20 From TELEIOS to LEO LEO builds on the advances of TELEIOS in the areas of: Semantic Web and Linked Data (mainly) Scientific Databases Goes beyond TELEIOS in covering the whole life-cycle of linked EO data. Application: Precision farming 20

21 The Life-Cycle of EO Data According to TELEIOS and LEO 21

22 Thanks

23 Useful links TELEIOS project LEO project Strabon Sextant Linked EO data MonetDB/SciQL/Data Vaults

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