Browsing by Author "Ayugi, Samson"

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    OBIA-based Monitoring of Riparian Vegetation Applied to the Identification of Degraded Acacia Xanthophloea along Lake Nakuru, Kenya.
    (HAL Open Science, 2018) Osio, Anne; Lefèvre, Sébastien; Ogao, Patrick; Ayugi, Samson
    The Lake Nakuru (Kenya) faces flooding since 2010, thus interfering with the growth of riparian vegetation, and requiring automated image analysis to monitor the effect of flooding on the Lake Nakuru Riparian Reserve vegetation species. The vegetation specie that was affected by the flooding lake is Acacia Xanthophloea, i.e. a habitat and feed for many animal species within the National Park. In this study, we explore how an OBIA methodology can provide riparian vegetation classification, thus easing the detection of degraded Acacia Xanthophloea spp. Our study shows that: i) from a thematic point of view, GEOBIA was able to identify Acacia Xanthophloea from Landsat satellite imagery, and comparing the resulting classification maps allows us to achieve monitoring of this specie through time; ii) from a software point of view, it might be necessary to involve several different tools (both proprietary or open source) since there is still some missing functionalities in the existing GEOBIA software solutions.