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- W2126572036 abstract "This study focuses on the Valley Bottom Wetlands (VBWs) in headwater catchments, a particular type of wetland that is included in palustrine wetlands. These small riparian wetlands are generally not inventoried although they strongly influence hydrology, water quality and biodiversity over whole catchment areas. This paper proposes a methodology for the inventory of existing VBWs located in Britanny (North-Western France) from a SPOT 5-HRG image acquired in january 2003. Due to their dispersion and heterogeneity, traditional classification methods have been found to be ineffective for the automated extraction and characterization of VBWs. Therefore, an object oriented classification method was used in this research to delineate VBWs and characterize wetland functional units within the wetland. Two different segmentation resolutions were selected to extract the image objects, based on spectral properties, texture, size, shape, and topological relationships that have been factored into rules : i) External wetland boundaries were defined using the coarser object resolution level and ii) land-cover and land-use units inside the wetland area were extracted using the higher object resolution level. In both cases, the whole image was classified, applying two different classifiers, the NN (Nearest Neighbour) classifier and the MF (Membership Functions) classifier. Accuracy assessment values were then generated. The classification results show quite good accuracy levels concerning the wetland boundary delineation and therefore wetlands identification. The results regarding wetland characterization, in discriminating different land-cover and land- use classes, show fairly reasonable accuracy levels for classes identification inside wetland areas during the winter season. However, it is felt that there is still much misclassification that can be improved upon, in using images acquired in latter spring." @default.
- W2126572036 created "2016-06-24" @default.
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- W2126572036 date "2006-07-01" @default.
- W2126572036 modified "2023-09-25" @default.
- W2126572036 title "Object-oriented Mapping and Analysis of Wetlands using SPOT 5 Data" @default.
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- W2126572036 doi "https://doi.org/10.1109/igarss.2006.884" @default.
- W2126572036 hasPublicationYear "2006" @default.
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