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Assessment of Land-cover Change Accuracy with Multi-temporal National Land-cover Maps: A Case Study on the Guryang-cheon Watershed, South Korea

  • Journal of the Korean Cartographic Association
  • Abbr : JKCA
  • 2014, 14(1), pp.61~75
  • Publisher : The Korean Cartographic Association
  • Research Area : Social Science > Geography > Geography in general > Cartography

Jong-Cheol Park ORD ID 1,  Kim, Jang Soo 2

1공주대학교
2국립환경과학원

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ABSTRACT

The land-cover maps, which represent the physical material at the surface of the earth, have has been used as a fundamental data in various studies. Therefore, the accuracy of land-cover maps is one of important issues. This study assessed the accuracy of the land-cover change area detected with multi-temporal national land-cover maps(2000 and 2009) produced by Korea Ministry of Environment. The study area is 165.2km2 of the Guryang-cheon watershed, which is located in the mountainous area of central South Korea. According to the results, the overall land-cover change accuracy was as low as 33.2%. While the land-cover map 2000 has 44.2% overall accuracy, the land-cover map 2009 has 84.6% overall accuracy. The low accuracy of the land-cover map 2000 affects the low accuracy of land-cover change. The major cause of low accuracy in the land-cover map 2000 was a lack of precision in pre-processing of raw data, such as geometric correction or orthometric correction. Another factor limiting higher accuracy appeared to be difficulty in distinguishing the context of grass and a point bar on the inside of a stream bend. In order to improve land-cover change accuracy of the national land-cover map, accuracy of pre-processing will need to be improved, and it will need to strengthen verification in the area of high probability for possible classification error.

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This paper was written with support from the National Research Foundation of Korea.
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