Spatial information management platform for Dunhuang Global Geopark

International Symposium on Earth Observation for One Belt and One Road

地球科学;政治学;社会学;经济学

Yan-Long, Y.U.^1 ; Fa-Dong, W.U.^1 ; Jin-Fang, H.A.N.^1 ; Yan-Jie, Wang^1 ; Hao, C.H.U.^1

School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing

100083, China^1

关键词: Coefficient of correlation;    Geographic location;    Geological background;    Morphological features;    Object oriented approach;    Positive correlations;    Quaternary sediments;    Remote sensing images;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/57/1/012032/pdf
DOI  :  10.1088/1755-1315/57/1/012032

来源: IOP

【 摘 要 】

As a member of UNESCO Global Geoparks, Dunhuang Global Geopark has developed a great quantity of landforms formed under special geological background and extremely droughty climate, which integrate together with specific geographic location and cultural relics on the "Silk Road Economic Belt". The main geoheritage in Dunhuang Global Geopark is Yardang landform, which is formed by loose Quaternary sediments. According to different shapes, the Yardang landform were divided into five types, namely, ridge-shaped Yardang, wall-shaped Yardang, tower-shape Yardang, column Yardang and Yardang monadnock. In order to monitor and protect the unique morphological features of Yardang landforms, a spatial information management platform is established, using SPOT 6 remote sensing image, with object oriented approach and manual interactive interpretation. Study shows that the maximum area, perimeter, length and width of Yardang were 324843.1 m2, 3447.52 m, 1508.41m, and 285.81 m, respectively. Additionally, the aspect ratio of Yardang has a certain positive correlation, with the coefficient of correlation being 0.675. Furthermore, the relationship between length and width of Yardang is calculated using formula Y=2.546X, where Y = length, X = width.