|Table of Contents|

An Automatic Extraction Algorithm for Terraced FieldsBased on UAV High Precision DEM Data(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年02期
Page:
59-65
Research Field:
测绘科学与技术
Publishing date:

Info

Title:
An Automatic Extraction Algorithm for Terraced FieldsBased on UAV High Precision DEM Data
Author(s):
Zhao Fei1; 2; 3; Xiong Liyang1; 2; 3; Yao Jin4; Fang Xuan1; 2; 3; 5; Dai Wen1; 2; 3; Tang Guoan1; 2; 3
(1.Key Laboratory of Virtual Geographic Environment of Ministry of Education,Nanjing Normal University,Nanjing 210023,China)(2.School of Geography,Nanjing Normal University,Nanjing 210023,China)(3.Jiangsu Center for Collaborative Innovation in Geographi
Keywords:
DEM; terraced extraction; high precision DEM of UAV
PACS:
S284
DOI:
10.3969/j.issn.1672-1292.2020.02.009
Abstract:
This paper proposes an automatic extraction algorithm for terraced fields based on DEM slope characteristics. Firstly,one-meter resolution DEM is obtained with the basis of UAV aerial survey technology,and slope is calculated on this basis. Meanwhile,terrace line is located in the maximum area of slope digital terrain model. Secondly,the slope flow simulation algorithm is used to extract the extreme value region. Finally,the extraction results are masked to eliminate the non-terraced areas,and the final terraced extraction results are obtained. Taking Wangdonggou watershed in Changwu County of Shaanxi Province as an experimental sample area,the experimental results are compared with the results of terrace extraction,which are labeled by visual interpretation based on remote sensing image,or extracted from illumination model of DEM shading. The comparison results show that the accuracy of this method is 90.67%. Compared with true value of visual interpretation,it has a higher extraction accuracy. Compared with the results of illumination model of DEM shading,this method can provide more complete and continuous result of terrace. The rapid extraction method and results of the terrace can provide a basis for the research of soil and water conservation,agricultural development and ecological environment control.

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Last Update: 2020-05-15