IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2014  > Vol11 No.6
Snake Model for the Extraction of Loess Shoulder-line from DEMs
YAN Shi-jiang; TANG Guo’an; LI Fa-yuan; ZHANG Lei
Corresponding AuthorTANG Guo’an
2014-11
Source PublicationJournal of Mountain Science
Volume11Issue:6Pages:1552-1559
AbstractShoulder lines are the most important landform demarcations for geographical analysis, soil erosion modeling and land use planning in the Loess Plateau area of China. This paper proposes an automatic, effective and accurate method of determining loess shoulder line from DEMs by integrating a hydrological D8 algorithm and a snake model. The watershed boundary line is adopted as the initial contour which evolves to identify the exact position of loess shoulder-line by the guidance of an external force of snake model from DEMs. Experiments show that the method overcomes the difficulties in both threshold selection for edge detection and the disconnecting issues in former extraction approaches. The accuracy evaluation of shoulder-line maps from the two test sites of the loess plateau area show obvious improvements in the extraction. The average contour matching distance of the new method is 12.0 m on 5 m resolution DEM, and shows improvement in the accuracy and continuity. The comparisons of accuracy evaluations of the two test sites show that the snake model method performs better in the loess plain area than in the area with high gully density.
KeywordSnake Model Dem Loess Shoulder-line
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7423
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.6
Corresponding AuthorTANG Guo’an
Recommended Citation
GB/T 7714
YAN Shi-jiang,TANG Guo’an,LI Fa-yuan,et al. Snake Model for the Extraction of Loess Shoulder-line from DEMs[J]. Journal of Mountain Science,2014,11(6):1552-1559.
APA YAN Shi-jiang,TANG Guo’an,LI Fa-yuan,&ZHANG Lei.(2014).Snake Model for the Extraction of Loess Shoulder-line from DEMs.Journal of Mountain Science,11(6),1552-1559.
MLA YAN Shi-jiang,et al."Snake Model for the Extraction of Loess Shoulder-line from DEMs".Journal of Mountain Science 11.6(2014):1552-1559.
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