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Earth Science Informatics

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24.10.2016 | Research Article

DEM generalization with profile simplification in four directions

verfasst von: Tianwu Ma, Yonggang Chen, You Hua, Zhende Chen, Xiaoyin Chen, Chengzhi Lin, Chunju Yang

Erschienen in: Earth Science Informatics | Ausgabe 1/2017

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Abstract

The DEM generalization is the foundation of expressing and analyzing the terrain and the basis of multi-scale observation. Meanwhile, it is also the core of building the multi-scale geographic database. This paper would like to propose a new algorithm using profile simplification in four directions(4-DP). This algorithm is composed of two parts, namely extraction of terrain feature points in local window as well as in global profile line and reconstruction of DEMs. The paper used the 5 m resolution DEM of the Suide in Loess Plateau of China as the original data. In the experiment, this paper has achieved the generalized DEM with 5 m and 25 m resolution by removed small details and computed out the optimal threshold. In contrast to the classic algorithms, VIP and Aggregate, based on three evaluation methods. The results show that this method is able to retain the main geographical information effectively in terrain surface.

Vorheriger Artikel Iterative selective spatial variance reduction of MYD11A2 LST data

Nächster Artikel Spatiotemporal characteristics of TOMS-based dust aerosol optical depth in northern China during 1978–2005

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Titel: DEM generalization with profile simplification in four directions
verfasst von: Tianwu Ma
Yonggang Chen
You Hua
Zhende Chen
Xiaoyin Chen
Chengzhi Lin
Chunju Yang
Publikationsdatum: 24.10.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Earth Science Informatics / Ausgabe 1/2017
Print ISSN: 1865-0473
Elektronische ISSN: 1865-0481
DOI: https://doi.org/10.1007/s12145-016-0275-1

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