Data fusion and classifier ensemble techniques for vegetation mapping in the coastal Everglades |
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Authors: | Caiyun Zhang Zhixiao Xie |
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Institution: | 1. Department of Geosciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA.czhang3@fau.edu;3. Department of Geosciences, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA. |
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Abstract: | This study examined the applicability of data fusion and classifier ensemble techniques for vegetation mapping in the coastal Everglades. A framework was designed to combine these two techniques. In the framework, 20-m hyperspectral imagery collected from Airborne Visible/Infrared Imaging Spectrometer was first merged with 1-m Digital Orthophoto Quarter Quads using a proposed pixel/feature-level fusion strategy. The fused data set was then classified with an ensemble approach based on two contemporary machine learning algorithms: Random Forest and Support Vector Machine. The framework was applied to classify nine vegetation types in a portion of the coastal Everglades. An object-based vegetation map was produced with an overall accuracy of 90% and Kappa value of 0.86. Per-class classification accuracy varied from 61% for identifying buttonwood forest to 100% for identifying red mangrove scrub. The result shows that the framework is promising for automated vegetation mapping in the Everglades. |
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Keywords: | data fusion classifier ensemble vegetation mapping Everglades |
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