标题: A heuristic DEM generalization by combining catchments

作者: Li, JZ (Li, Jingzhong); Shen, YL (Shen, Yilang); Gao, A (Gao, Aji); Chen, K (Chen, Kai); Zhang, Y (Zhang, Yong); Ai, TH (Ai, Tinghua)

来源出版物: GEOCARTO INTERNATIONAL DOI: 10.1080/10106049.2021.2017019 提前访问日期: DEC 2021

摘要: Multi-scale digital elevation model (DEM) is an important content of digital terrain analysis. To generate multi-scale DEM, this study reports a heuristic DEM generalization method. The key of DEM generalization is to maintain the main topographic features and remove the minor topographic features. Our method takes catchment as generalizing object, not single grid pixel as generalizing object. In this way, DEM simplification can be achieved on the basis of maintaining the main terrain characteristics. Compared with the resample method, VIP method and low pass filter method, the proposed method can preserve the main topographic features well when the minor topographic features are deleted. Our main contribution lies in: taking terrain information rather than raw data as the generalizing object, which improves the rationality of the generalizing results; and the heuristic method proposed in this paper has good operability and high automation.

入藏号: WOS:000730492000001

语言: English

文献类型: Article; Early Access

作者关键词: Digital elevation model; DEM generalization; combination of catchments; valley line; virtual modeling; cartography; topography; terrain

地址: [Li, Jingzhong; Shen, Yilang; Gao, Aji; Ai, Tinghua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan, Peoples R China.

[Shen, Yilang] Univ Bonn, Inst Geodesy & Geoinformat, Bonn, Germany.

[Chen, Kai; Zhang, Yong] Chengdu Res Inst Surveying & Invest, Chengdu, Sichuan, Peoples R China.

通讯作者地址: Shen, YL (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan, Peoples R China.

电子邮件地址: yilangshen@whu.edu.cn

影响因子：4.889