Artificial surfaces simulating complex terrain types for evaluating grid-based flow direction algorithms
文献类型：期刊论文
| 作者 | Qin, CZ ; Bao, LL ; Zhu, AX ; Hu, XueMei(呼雪梅) ; Qin, B |
| 刊名 | INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE
 |
| 出版日期 | 2013 |
| 卷号 | 27期号:6页码:1055-1072 |
| 关键词 | artificial surface error assessment specific catchment area flow direction algorithm gridded digital elevation models |
| 通讯作者 | Qin, CZ |
| 英文摘要 | This article presents a set of artificial surfaces simulating complex terrain types for evaluating the performances of grid-based flow direction algorithms. The proposed artificial surfaces were developed based on sine and cosine functions and thus can simulate four complex terrain types: a convex-centred slope, concave-centred slope, saddle-centred slope and straight-ridge slope; such features are typical and widespread in real landscapes. We analytically solved the theoretical values of specific catchment area (SCA) for the proposed artificial surfaces. Compared with existing artificial surfaces for evaluating flow direction algorithms, the proposed artificial surfaces provide a better representation of common terrain types in the real world. To analyse the feasibility of the proposed artificial surfaces, two sets of artificial digital elevation models (DEMs) were created by sampling the proposed artificial surfaces with different reliefs at a series of resolutions (i.e. 1, 5, 10 and 20m). Four representative flow direction algorithms were applied to these artificial DEMs: D8, D-inf, FD8 and MFD-md. The root mean square error, mean error and standard deviation in the computed SCA from flow direction algorithm show that MFD-md generally yielded lower error under simulated terrain conditions than D8, D-inf and FD8. The cumulative frequency distributions of errors from the tested flow direction algorithms with the proposed artificial DEMs can effectively reflect the inherent characteristics of each algorithm. MFD-md performed more similarly to FD8 in low-relief terrains and more similarly to D-inf in high-relief terrains. The map of errors from each tested algorithm is available for a spatially explicit evaluation of the occurrence of errors. Over most of the area, the D-inf algorithm underestimated the SCA when FD8 overestimated the SCA. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China 40971235;Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences 2011RC203;University of Wisconsin-Madison |
| 公开日期 | 2013-09-10 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/27960]  |
| 专题 | 地理科学与资源研究所_研究生部 |
| 推荐引用方式 GB/T 7714 | Qin, CZ,Bao, LL,Zhu, AX,et al. Artificial surfaces simulating complex terrain types for evaluating grid-based flow direction algorithms[J]. INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE,2013,27(6):1055-1072. |
| APA | Qin, CZ,Bao, LL,Zhu, AX,Hu, XueMei,&Qin, B.(2013).Artificial surfaces simulating complex terrain types for evaluating grid-based flow direction algorithms.INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE,27(6),1055-1072. |
| MLA | Qin, CZ,et al."Artificial surfaces simulating complex terrain types for evaluating grid-based flow direction algorithms".INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE 27.6(2013):1055-1072. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。