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Automated Analysis of Satellite Imagery to provide Information Products for Humanitarian Relief Operations in Refugee Camps – from Scientic Development towards Operational Services Automatische Auswertung von Satellitenbilddaten zur Bereitstellung von Informationen zur Unterstützung von humanitären Hilfsaktionen in Flüchtlingslagern–von wissenschaftlicher Entwicklung bis hin zu funktionsfä higen Diensten

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Assistance to displaced people in crisis situations requires coordinated and timely action. The latest generation of very high resolution satellite imagery, previously limited in terms of availability and/or resolution, has opened new possibilities for aid organisations to enhance their own reconnaissance. This paper documents the development of algorithms for automated satellite imagery based analysis of refugee and IDP (internally displaced people) camps, and their application over several years under varying conditions, i.e. different sensors and different areas. At fourteen sites VHR (very high resolution) satellite data of four different sensors were used to analyse camps by applying automated dwelling extraction including dwelling differentiation, dwelling density calculation and camp outline estimations, as well as camp monitoring over time. Ranging from experimental stage research, over real-time and benchmarking exercises to pre-operational information provision, the OBIA (object-based image analysis) processing routines greatly matured in terms of transferability, usability and operability.

German
Die Versorgung von Flüchtlingen in Krisensituationen erfordert koordinierte und zeitkritische Hilfsmaßnahmen. Die Fernerkundung als Quelle zeitnaher, ächendeckender und unver fälschter Primärdaten eignet sich insbesondere seit dem Zeitalter der höchstau ösenden optischen Da ten zum Monitoring und zur Folgenabschätzung von Bevölkerungsbewegungen in Krisensituationen, insbesondere von Flüchtlings- bzw. Vertriebenenlagern in schwer erreichbaren oder nicht zugänglichen Gebieten. In diesem Beitrag werden die Entwicklung von Algorithmen zur automatisierten Analyse von Satellitenbilddaten im Bereich von Flüchtlingslagern und deren praktische Anwendungen über einen mehrjährigen Zeitraum und un ter verschiedenen Bedingungen beschrieben. Die Anwendungen umfassen bisher insgesamt 14 unterschiedliche Gebiete unter Nutzung von vier unterschiedlichen Sensoren zur Extraktion von Behausungsstrukturen inklusive unterschiedlicher Behausungstypen, Analyse der Ausdehnung der Flüchtlings-/Vertriebenenlager, aber auch zum Monitoring über einen längeren Zeitraum hinweg. Angefangen von ersten experimentellen Entwicklungenüber Echtzeit- bzw. Validierungsübungen bis hin zur operationellen Anwendung wird die Verbesserung der auf objektbasierter Bildanalyse (object-based image analysis OBIA) beruhenden Algorithmen hinsichtlich Übertragbarkeit, Verwendbarkeit und Funktionsfähigkeit gezeigt.
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Keywords: CONDITIONED INFORMATION; GMES; INFORMATION PRODUCTS; KNOWLEDGE-BASED; OBJECT-BASED IMAGE ANALYSIS; REFUGEE AND IDP CAMPS; RULE-SETS

Document Type: Research Article

Publication date: June 1, 2013

More about this publication?
  • Photogrammetrie - Fernerkundung - Geoinformation (PFG) is an international scholarly journal covering the progress and application of photogrammetric methods, remote sensing technology and the intricately connected field of geoinformation processing.

    Papers published in PFG highlight new developments and applications of these technologies in practice. The journal hence addresses both researchers and student of these disciplines at academic institutions and universities and the downstream users in both the private sector and public administration.

    PFG places special editorial emphasis on the communication of new methodologies in data acquisition, new approaches to optimized processing and interpretation of all types of data which were acquired by photogrammetric methods, remote sensing, image processing and the computer-aided interpretation of such data in general.

    PFG is the official journal of the German Society of Photogrammetry and Remote Sensing.
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