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Research project (§ 26 & § 27)
Duration : 2020-07-01 - 2023-06-30

At the end of the 1980s the Municipal Department for Environmental Protection of Vienna - MA 22 initiated a detailed biotope mapping on the basis of the Viennese nature conservation law. Approximately 40 % of Vienna’s city area were covered, however only 2 % of the densely populated areas. This biotope mapping is the basis for the current biotope types mapping (2005-2011) and of the green areas monitoring (2005). An update of these surveys has been planned in order to meet the various requirements of urban nature conservation and the national respectively international legal monitoring and reporting obligations. Since the 1970s the municipality of Vienna has build up a comprehensive database and uses state-of-the-art methods for collecting geodata carrying out services for surveying, airborne imaging and laserscanning. Currently a mobile mapping system, oblique aerial photos and a surveying flight with the new singlephoton-lidar-ALS-system (SPL100) is being implemented or prepared. Because of the numerous high resolution data available within the municipality and limitations mainly in spatial resolution of satellite data, the City of Vienna did not need to use them up to now. However, satellite data are now available within Copernicus, which have considerable potential for monitoring green spaces and biotope types due to their high temporal resolution and the large number of spectral channels. For the first time, the Sentinel-1 mission offers a combination of high spatial resolution in Interferometric Wide Swath (IW) recording mode and high temporal coverage of up to four shots every 12 days in cross-polarization in the C-band. The Sentinel-2 satellites deliver multispectral data in 10 channels every 5 days with spatial resolutions of 10 or 20 m. Within SeMoNa22 project, various indicators are derived for the Vienna urban area (2015-2020) and used for object-oriented mapping and classification of biotope types and characterization of the green space: • Sentinel-1 data (→ time series on the annual cycles in the backscattering properties of the vegetation), • Sentinel-2 data (→ multispectral time series via parameters for habitat classification / vegetation indices), • High-resolution earth observation data (ALS, image matching, orthophoto → derivation of boundaries by different segmentation approaches). The main goals within SeMoNa22 project is to explore efficient and effective ways of knowing if, how and to what extent the data collected can form the basis and be integrative part of urban conservation monitoring. For this purpose, combinations of different earth observation data (aircraft and satellite-supported or terrestrial sensors) and existing structured fieldwork data collections are examined by means of pixel- and segment-oriented methods of remote sensing or image processing.
Research project (§ 26 & § 27)
Duration : 2020-06-16 - 2021-01-15

In the years 2008-2017, approx. 990,000 m³ of gravel were used to fill gravel islands. These islands represent a suitable instrument for the ecological improvement of the Danube riverbanks and the support of the Natura 2000 protected areas in the Wachau. The aim of this study is the monitoring of gravel islands regarding the development of the Natura 2000 protected areas. In this feasibility study it is investigated how UAV images can be used to record the vegetation and the composition of the abiotic surface substrate.The aim is to develop a concept for the monitoring of the islands (technical equipment, recording methods, interval, evaluation methods, etc.).
Research project (§ 26 & § 27)
Duration : 2020-07-01 - 2021-03-31

In the WEPS project in question, it is planned to derive prompt estimates of the expected harvest quantities from satellite data. For the first time a combined analysis of the two newest European Copernicus satellites (Sentinel-2A and -2B) will be used. The two satellites are complemented by the two established MODIS satellites (Terra and Aqua). The two Sentinel-2Satellites cover the earth's surface in very high spatial resolution, which allows a good separation of the vines from non-stocked neighbouring areas. The two satellites MODIS Aqua and MODIS Terra, on the other hand, record the entire earth's surface in coarser resolution, but have been doing so on a daily basis for about 20 years - and this in a total of 36 different spectral bands (including the thermal range).

Supervised Theses and Dissertations