DOI: 10.3390/rs12030526
论文题名: Geometric quality assessment of chang'E-2 global DEM product
作者: Xin X. ; Liu B. ; Di K. ; Yue Z. ; Gou S.
刊名: Remote Sensing
ISSN: 20724292
出版年: 2020
卷: 12, 期: 3 语种: 英语
英文关键词: Chang'E-2
; DEM assessment
; Geometric quality
; Lunar mapping
; Matching
Scopus关键词: Errors
; Frequency domain analysis
; Geometry
; Statistics
; Chang'E-2
; DEM assessment
; Digital elevation model
; Geometric quality
; Geometric uncertainties
; Instructional information
; Matching
; Statistical information
; Surveying
英文摘要: The Chang'E-2 digital elevation model (DEM, named CE2TMap2015)/ which is the highest resolution DEM product in China, was released with global coverage of the lunar surface. A detailed geometric quality assessment of the product is desirable for wider applications by users. A novel procedure for evaluating DEM geometric quality, which investigates both the global geometric uncertainty and local gross errors, is proposed in this paper. First, the DEM was divided into regular blocks and matched with the reference DEM. Then, the characteristics of errors were investigated using the statistical information of the matched tie points. Next, the local outlier factor (LOF) algorithm was performed to locate the gross errors. In our experiment, CE2TMap2015 was evaluated using the proposed method, with SLDEM2015 as the reference DEM. The results show that there were widespread geometric inconsistencies with an area-weighted average of 183.1 m horizontally (with the standard deviation being 101.2 m) and 2.3 m vertically (with the standard deviation being 15.4 m). Gross errors were detected automatically and were excluded in the statistical analysis. The periodic errors were extracted in the frequency domain using a Fourier transform. Our research results provide instructional information for the utilization of CE2TMap2015 by world-wide users. The proposed method can be used in the assessment of other planetary DEMs. © 2020 by the authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159407
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100101, China; School of Geology and Geomatics, Tianjin Chengjian University, Tianjin, 300384, China; State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, 999078, China; CAS Center for Excellence in Comparative Planetology, Hefei, 230026, China
Recommended Citation:
Xin X.,Liu B.,Di K.,et al. Geometric quality assessment of chang'E-2 global DEM product[J]. Remote Sensing,2020-01-01,12(3)