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Rule set of object-oriented classification using Landsat imagery in Donganh, Hanoi, Vietnam
Rule set of object-oriented classification using Landsat imagery in Donganh, Hanoi, Vietnam
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography. 2013. Dec, 31(6_2): 521-527
  • Received : August 22, 2013
  • Published : December 31, 2013
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Thu Trinh Thi Hoai
Lan Pham Thi
Ai Tong Thi Huyen

Abstract
Rule set is an important step which impacts significantly on accuracy of object-oriented classification result. Therefore, this paper proposes a rule set to extract land cover from Landsat Thematic Mapper (TM) imagery acquired in Donganh, Hanoi, Vietnam. The rules were generated to distinguish five classes, namely river, pond, residential areas, vegetation and paddy. These classes were classified not only based on spectral characteristics of features, but also indices of water, soil, vegetation, and urban. The study selected five indices, including largest difference index max.diff; length/width; hue, saturation and intensity (HSI); normalized difference vegetation index (NDVI) and ratio vegetation index (RVI) based on membership functions of objects. Overall accuracy of classification result is 0.84% as the rule set is used in classification process.
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