Analysis of Land Use and Land Cover Change Using Time-Series Data and Random Forest in North Korea

Remote Sensing

Seunggyu Jeong¹  Sangjin Park²  Yong Piao³  Dongkun Lee³ 

[1] Animal Resources Division, National Institute of Biological Resources, Incheon 22689, Korea;Interdisciplinary Program in Landscape Architecture & Transdisciplinary Program in Smart City Global Convergence, Seoul National University, Seoul 08826, Korea;Research Institute of Agriculture Life Science, Seoul National University, Seoul 08826, Korea;

关键词: forest change trend;    terrace field;    North Korea;    random forest (RF);    Google Earth Engine (GEE);   

DOI  :  10.3390/rs13173501

来源: DOAJ

【 摘 要 】

North Korea being one of the most degraded forests globally has recently been emphasizing in forest restoration. Monitoring the trend of forest restoration in North Korea has important reference significance for regional environmental management and ecological security. Thus, this study constructed and analyzed a time-series land use land cover (LULC) map to identify the LULC changes (LULCCs) over extensive periods across North Korea and understand the forest change trends. The analysis of LULC used Landsat multi-temporal image and Random Forest algorithm on Google Earth Engine(GEE) from 2001 to 2018 in North Korea. Through the LULCC detection technique and consideration of the cropland change relation with elevation, the forest change in North Korea for 2001–2018 was evaluated. We extended the existing sampling methodology and obtained a higher overall accuracy (98.2% ± 1.6%), with corresponding kappa coefficients (0.959 ± 0.037), and improved the classification accuracy in cropland and forest cover. Through the change detection and spatial analysis, our research shows that the forests in the southern and central regions of North Korea are undergoing restoration. The sampling method we extended in this study can effectively and reliably monitoring the change trend of North Korea forests. It also provides an important reference for the regional environmental management and ecological security in North Korea.

【 授权许可】

Unknown