A Biography of Waller Creek, A Case Study in Urbanization and Environment

Waller Creek Working Grou

Building Virtual Earth Observatories using Ontologies and Linked Geospatial Data

TELEIOS is a European project that addresses the need for scalable access to petabytes of Earth Observation data and the discovery of knowledge that can be used in applications. To achieve this, TELEIOS builds on scientific database technologies (array databases, SciQL, data vaults), Semantic Web technologies (stRDF and stSPARQL) and linked geospatial data. In this technical communication we outline the TELEIOS advancements to the state of the art and give an overview of its technical contributions up to today

Geospatial Data Analysis for Security Applications at the JRC - Challenges and Opportunities for Information Mining

Image information mining is being reviewed at the JRC as a potential component in an end-to-end production chain for rapid mapping applications. The focus is on applications requiring high-resolution and very high-resolution image data. We will discuss experiences based on an evaluation study and address critical issues, e.g. the handling of complex information content present in VHR data and semantic user requirements.JRC.G.2-Support to external securit

Multi-Sensor and Multi-Temporal Fusion of VHR Satellite Imagery based on KIM

Similar to many advanced approaches in data fusion and multi-sensor image analysis, Image Information Mining (IIM) is hampered by sensor-specific differences in spatial resolution and spectral response. This study examines the representation of semantic categories integrating Ikonos and Quickbird imagery in the Knowledge-Based Information Mining system KIM. An operationally viable processing sequence is presented which accounts for sensor-related differences along with an evaluation of the application of IIM technologies in operational rapid mapping scenarios.JRC.DG.G.2-Global security and crisis managemen

NOAA AVHRR Data Curation and Reprocessing - TIMELINE

2013 marks the 35th anniversary of NOAA's Advanced Very High Resolution Radiometer (AVHRR) first launched in 1978. The four to six band multi-spectral AVHRR data constitute a valuable data source for deriving time series of surface parameters, such as snow cover, land surface temperature, or vegetation indices for monitoring global change. AVHRR data are residing in various archives worldwide. ESA has archived NOAA data in several of their facilities; DLR has been receiving and processing NOAA AVHRR data into value-added products since 1981. In order to properly preserve this valuable dataset, ESA has initiated the NOAA AVHRR data curation and reprocessing initiative as a pilot project within ESA's long-term data preservation (LTDP) program. The project's objective is the consolidation and curation of a temporally and geographically complete and consistent dataset of 1 km NOAA AVHRR HRPT data over Europe and Canada. The project will be conducted jointly with the members of the LTDP working group of the ESA Ground Segment Coordination Body. Additionally, in 2013 DLR has kicked off TIMELINE, a project focusing on generating a range of over 25 thematic products from the complete coverage of 30 years worth of NOAA AVHRR 1 km level 0 data over Europe. The thematic products will serve as input for performing higher level time series analyses on land surface dynamics, such as investigating changes in annual snow cover duration or exploring local land surface temperature trends. Within the project a sustainable, generic infrastructure for processing Earth observation time series at DLR will be implemented. With their wide scope, the two projects touch upon a variety of topics and disciplines on the scientific side as well as in large volume data processing and data management. The initial challenge lies in identifying and closing temporal and geographic data gaps for consolidating and curating 30 years worth of AVHRR data held in dispersed archives. Curation will be done in line with the European LTDP data preservation workflow. Preparation for systematic pre-processing and processing will involve external calibration and navigation data to be introduced in the pre-processing systems. Turning scientific algorithms into flexible processing systems to efficiently re-process 30 terabytes of level 0 data into about 50 terabytes of validated thematic products is another challenge. On the data management side product archiving and access infrastructures will have to be adapted to ensure e.g. efficient and user-friendly retrieval of localized time series data stacks. Interactive on-the-fly visualizations of time series products will facilitate the understanding of complex and interacting temporal phenomena. Close collaboration between scientists and ground segment engineers - and their respective operational approaches - is a particularly useful aspect of this project, with a view to expanding ground segment services towards incorporating flexible, large volume scientific processing chains in the future. From the NOAA AVHRR Data Curation and Reprocessing and TIMELINE projects novel ideas for managing large Earth observation time series data sets are expected across the entire end-to-end chain - from data consolidation via reprocessing and data management to innovative ways of data discovery and exploitation

Behind the Scenes at the DLR National Satellite Data Archive, a Brief History and Outlook of Long Term Data Preservation

The Earth Observation Center (EOC) at the German Aerospace Center (DLR) is the center of competence in Germany, providing expertise in earth observation research and development activities, as well as operational tasks for data reception, processing and archiving. We briefly present the German Satellite Data Archive (D-SDA) with systems and activities that make it possible to accomplish successful Long Term Data Preservation (LTDP) over more than 20 years with nearly exponentially growing data capacity. Tables, facts and figures exhibit the path taken at DLR to successfully establish the infrastructure for long term data preservation for Germany and Europe. Our experience is that that LTDP is manageable but requires following the evolution in technology, new usage scenarios and data policies. DLR is working on the continuous evolution of the flexible DIMS components, infrastructure and management services to serve the processing and archiving centers for the next generation earth observation satellites

Reporting in a Payload Data Ground Segment

This paper describes the concept and implementation of the DIMS Reporting Control (RC) for the multi-mission PDGS environment. The tool compiles reports based on data collected from multiple components. It generates ad-hoc and scheduled reports and employs statistical analyses to depict the current system state or its evolution over time. This paper introduces DIMS reporting requirements, followed by a discussion on how these drive design decisions. Then involved interfaces and tools are presented. Next the proposed system is compared to existing solutions. The publication concludes with an evaluation of the DIMS Reporting Control implementation from the perspectives of usability and performance

Nationale Copernicus Data and Exploitation Platform im DLR - Sachstand und Schnittstelle zur GDI-DE und zum Deutschen Satellitendatenarchiv

Mit dem Copernicus-Programm tritt die Erdbeobachtung in Europa eine neue Ära ein. Sys-tematische, langjährig gesicherte satelliten-, flugzeug- und bodengestützte Beobachtungen mit unterschiedlichsten Sensoren, Datenmengen im zweistelligen Petabyte-Bereich, opera-tionelle Produkte und Dienstleistungen sowie hochleistungsfähige, integrierte über Europa verteilte Infrastrukturen stellen uns technisch-wissenschaftlich wie auch organisatorisch vor neue Herausforderungen. Auf der anderen Seite eröffnet Copernicus nie dagewesene Mög-lichkeiten unsere Umwelt im Detail zu beobachten, Phänomene zu verstehen und belastba-rere Aussagen zum Globalen Wandel zu formulieren. Durch eine nachhaltig gesicherte, kostenfreie Datenversorgung entstehen zudem Anreize für wirtschaftliche Wertschöpfung. In Deutschland erfolgt der zentrale Zugriff auf die Copernicus-Daten und -Dienste über die nationale Copernicus Daten- und Auswerte-Plattform CODE-DE. Unter Leitung des Deut-schen Zentrums für Luft- und Raumfahrt (DLR) baut ein Konsortium eine leistungsfähige Infrastruktur auf – integriert in die Geodateninfrastruktur Deutschland (GDI-DE) und das Geodatenportal.DE. Durch seine Anbindung an das deutsche Satellitendatenarchiv (D SDA) im DLR bietet CODE-DE zudem Zugriff auf umfangreiche, weit über Copernicus hinausgehende Fernerkundungsdatenbestände

Big data management in Earth Observation: the German Satellite Data Archive at DLR

The German Satellite Data Archive at the German Aerospace Center (DLR) has been managing large volume Earth observation data for more than two decades. Hardware, data management, processing, and user access, as well as long-term preservation are under one roof and interact closely in the payload ground segment (PGS). Several examples will demonstrate how Earth observation data life cycles benefit from close interaction between the PGS and the application scientists and from operational experience gathered over time

The D-SDA Reporting System: Reporting and User Access at DLR-EOC

In recent years, Earth observation missions and projects have put ever-increasing emphasis on reporting. Detailed reports are being requested on system performance, user behaviour and processing workload. At the same time reporting is gaining significance for data centres’ internal purposes as well – for identifying bottlenecks and optimizing system performance and reliability. For future planning, Earth Observation data centres increasingly need information-based forecasts. Reliable reports help in planning system evolution and upgrades. The German Satellite Data Archive (D-SDA) at the German Aerospace Centre DLR has established a comprehensive reporting system to respond to a variety of reporting demands – fully integrated with the data and information management system as well as the IT infrastructure. Running in a state-of-the-art software environment, the D-SDA Reporting System is accessible by an easy-to-use interface and offers a high-degree of flexibility regarding input and output formats. This paper will outline the challenges for reporting at DLR-EOC and introduce the reporting system architecture embedded in the D-SDA multi-mission data management environment. It will highlight current developments and future challenge