LAND USE/COVER MAPPING OF MOUNTAINOUS AREA USING KNOWLEDGE BASED CLASSIFICATION APPROACH : CASE STUDY IN BACKAN PROVINCE, VIETNAM

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概要

• 論文の詳細を見る

• Mountainous area in Vietnam is mostly dominated by ethnic groups which rely on various agricultural activities composed of lowland and upland cultivation. The upland cultivation is one of traditional methods of how local people use the land. This activity, however, has great impact on environment due to forest cutting, exploitation of vegetation cover for household usage such as fuel consumption, house building material etc. One of the way for monitoring shifting cultivation including distribution of upland crop is usage of multitemporal remote sensing images. To facilitate better change analysis, the single date remote sensing data should be analyzed by consistent methodology so that classification results of different times can be comparable to the other. In this study, the author proposes a so called knowledge based classification approach for land use/cover mapping. In this research, the SPOT image is segmented at first into bare and vegetated land (mask image). The bare land is further divided into upland and lowland areas by using hydrographical network. This model is based on the fact that all lowland is situated along rivers or streams. Because lowland is limited to valley areas that have been long time exploited so we could assume that there is no change. By subtraction of lowland crop from the mask image we could generate upland cultivated areas that is important for monitoring mountainous environment as well as vegetation degradation rate. By using land use model typical for ethnic people in the study area we can further extract mosaick/orchard from the classified image. The final land use/cover map that is featured by classes : forest, bush land, grassland, upland crop, lowland crop, mosaick, water body and bare land (transition and built up) is used as input for subsequent change analysis.

• 日本情報地質学会の論文
• 2003-03-25

著者

• Duong Nguyen

  Department Of Environmental Information Study And Analysis Institute Of Geography

• Duong Nguyen

  Department Of Environmental Information Study And Analysis (eisa) Institute Of Geography

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• LAND USE/COVER MAPPING OF MOUNTAINOUS AREA USING KNOWLEDGE BASED CLASSIFICATION APPROACH : CASE STUDY IN BACKAN PROVINCE, VIETNAM

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