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Re-delineating mountainous areas with three topographic parameters in Mainland Southeast Asia using ASTER global digital elevation model data
Xiao Chi-wei1,2; Li Peng1,2; Feng Zhi-ming1,2
2018-08-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume15Issue:8Pages:1728-1740
Corresponding AuthorFeng Zhi-ming(fengzm@igsnrr.ac.cn)
AbstractTropical mountainous areas not only provide substantial carbon storage and play an important role in global biological diversity, but also provide basic livelihood for a large number of poor ethnic minorities. However, there is no unified and explicit definition for mountainous areas. The local elevation range (LER) is a crucial structural parameter for delineating mountainous areas. However, current LER products are limited by the subjective selection of an optimum statistical window or coarser spatial resolution of topographical data. In this study, we presented an approach using thresholds for three topographic parameters, elevation, slope, and LER, derived from the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM) to redelineate the vast mountainous areas of mainland Southeast Asia (MSEA). The mean change-point analysis method was applied to determine the optimum statistical window of the 1 arc second (approximately 30 m)-resolution GDEM LER. The results showed that: First, the optimum statistical window is 38 x 38 cell units (width x height) in a rectangular neighborhood, or an area of about 1.30 km(2) for calculating GDEM LER in MSEA. Second, the LER of more than 80% of the area ranges from 30 m to 499 m in MSEA. The LERs in the northern and northwestern MSEA are greater than their counterparts in the south and east. Third, the area of the re-delineated mountainous areas was 83.52 x 10(4) km(2), about 38.71% of the total area. Spatially, the mountainous areas are mainly distributed in the north and northeast of MSEA. The re-delineated 30-m resolution map of the mountainous areas will serve as a topographical dataset for monitoring mountainrelated land surface changes in MSEA. The parameter-modified mountain extraction procedure can be expanded to delineate global mountainous areas.
KeywordMountainous areas Local elevation range (LER) Statistical analysis Global digital elevation model Mainland Southeast Asia (MSEA)
DOI10.1007/s11629-017-4746-8
WOS KeywordPOPULATION-DISTRIBUTION ; SPATIAL-DISTRIBUTION ; ACCURACY ASSESSMENT ; RELIEF DEGREE ; LAND-SURFACE ; SRTM DEM ; GDEM V2 ; CHINA ; CLASSIFICATIONS ; GEOMORPHOLOGY
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of Chinese Academy of Sciences[XDA20010203]
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000442239600009
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54377
Collection中国科学院地理科学与资源研究所
Corresponding AuthorFeng Zhi-ming
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xiao Chi-wei,Li Peng,Feng Zhi-ming. Re-delineating mountainous areas with three topographic parameters in Mainland Southeast Asia using ASTER global digital elevation model data[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(8):1728-1740.
APA Xiao Chi-wei,Li Peng,&Feng Zhi-ming.(2018).Re-delineating mountainous areas with three topographic parameters in Mainland Southeast Asia using ASTER global digital elevation model data.JOURNAL OF MOUNTAIN SCIENCE,15(8),1728-1740.
MLA Xiao Chi-wei,et al."Re-delineating mountainous areas with three topographic parameters in Mainland Southeast Asia using ASTER global digital elevation model data".JOURNAL OF MOUNTAIN SCIENCE 15.8(2018):1728-1740.
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