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C. Portalés Ricart:
"Georeferencing of GPS/INS-Supported Airborne Multispectral Scanner Data ";
Supervisor: K. Kraus, C. Ries; Institut für Photogrammetrie und Fernerkundung, 2002.

Multispectral airborne scanning devices gain increasing importance for example in the field of environmental monitoring. In Vienna, since a couple of years, a detailed information system about the status and changes of urban greenery is established and continuously updated in the course of the work program "BiotopMonitoring Vienna" of the Austrian Health Institute (Österreichisches Bundesinstitut für Gesundheitswesen - ÖBIG) [Pillmann and Kellner, 2001]. These investigations are mainly based on aerial color infrared photographs, which were taken in different flight missions that were carried out by the German Aerospace Centre (Deutsches Zentrum für Luft- und Raumfahrt - DLR). In the flight mission Vienna 2000 realised on September 2000, a total of 24 multispectral airborne scanner images covering the whole area of Vienna were acquired. An integrated GPS/INS system was in use to provide direct observations for the outer orientation parameters of the scans.


The geometric rectification or georeferencing of the 24 stripes is performed at the I.P.F. of the TU-Wien. During the geocoding procedure, it was seen that not all the obtained orthophotos were plenty satisfactory. Then, a detailed search of possible errors was required. In this sense, three stripes were selected to perform an analysis into more detail in the course of this diploma thesis. In the current project, strategies are tested with success in order to detect and minimise those errors.