An experiment using a circular neighborhood to calculate slope gradient from a DEM
文献类型：EI期刊论文
| 作者 | Pei Tao; Li Baolin; Qin Chengzhi |
| 发表日期 | 2007 |
| 关键词 | Photoelectric cells Slope stability Spatial variables measurement |
| 英文摘要 | The traditional 3 × 3 cell neighborhood used in a focal operation on a raster layer has a square shape that results in a dimensional neighborhood of which the orientation is eventually arbitrary to the physical features represented. This paper presents an experiment using a circular neighborhood to calculate slope gradient. Comparisons of the results from a circular neighborhood with the results from some traditional methods show that (a) for a smooth surface, the result from a circular neighborhood is more accurate than that from a square neighborhood, (b) a circular neighborhood is generally more sensitive to noise in the input DEM than a square neighborhood, and (c) in a validation using field measurements, the circular neighborhood performs better than the square neighborhood when the ratio of user-specified neighborhood size to cell size is high. © 2007 American Society for Photogrammetry and Remote Sensing. |
| 出处 | Photogrammetric Engineering and Remote Sensing
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| 卷 | 73期:2页:143-154 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24619]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Pei Tao,Li Baolin,Qin Chengzhi. An experiment using a circular neighborhood to calculate slope gradient from a DEM. 2007. |
入库方式： OAI收割
来源：地理科学与资源研究所
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