Geoland (EU)
Aufbau eines Umweltmonitoringsystems für Zentralafrika basierend auf SPOT VEGETATION Satellitendaten, EU / Internationale Forschungskooperation im Rahmen von GMES
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Geoland is carried out in the context of GMES, a joint initiative of European Commission (EC) and European Space Agency (ESA), which aims to build up a European capacity for Global Monitoring of Environment and Security.
The ambition of the geoland consortium is to develop and demonstrate a range of reliable, affordable and cost efficient European geo-information services, supporting the implementation of European directives and their national implementation, as well as European and International policies. Thus, the GMES initiative is considered a unique opportunity to integrate existing technology with innovative and scientifically sound elements into sustainable services.
Within the geoland consortium RSS was responsible for the "Assessment on the environmental status - Africa". This task focuses on the land cover assessment and monitoring. The work was done in close cooperation with the Joint Research Centre in Ispra. RSS focussed on multi-spectral change detection methods. The major challenge was to identify the most suitable change detection method for moderate and coarse spatial-resolution data, particularly MERIS, MODIS and SPOT VEGETATION. The objective was to directly identify changes in the spectral properties by comparing imagery of different acquisition dates. For detecting "multi-spectral change" the images must be geo-referenced with high accuracy. Besides selecting adequate change detection algorithms it was necessary to identify an operational definition of ?change? as well as meaningful thresholds to quantify changes in reflectance over time.
- Cloud-free SPOT VGT mosaic from the year 2004; compiled from CSP Core Service monthly mosaics.