How to Measure Distance on a Digital Terrain Surface and Why it Matters in Geographical Analysis
How to Measure Distance on a Digital Terrain Surface and Why it Matters in Geographical Analysis
复制标题
如何测量数字地形表面的距离及其在地理分析中的重要性
DOI:
10.1111/gean.12255
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发表时间:
2020
影响因子:
3.6
通讯作者:
Joseph, Maxwell B.
中科院分区:
文献类型:
--
作者:
Qiang, Yi;Buttenfield, Barbara P.;Joseph, Maxwell B.
Distance is the most fundamental metric in spatial analysis and modeling. Planar distance and geodesic distance are the common distance measurements in current geographic information systems and geospatial analytic tools. However, there is little understanding about how to measure distance in a digital terrain surface and the uncertainty of the measurement. To fill this gap, this study applies a Monte‐Carlo simulation to evaluate seven surface‐adjustment methods for distance measurement in digital terrain model. Using parallel computing techniques and a memory optimization method, the processing time for the distances calculation of 6,000 simulated transects has been reduced to a manageable level. The accuracy and computational efficiency of the surface‐adjustment methods were systematically compared in six study areas with various terrain types and in digital elevation models in different resolutions. Major findings of this study indicate a trade‐off between measurement accuracy and computational efficiency: calculations at finer resolution DEMs improve measurement accuracy but increase processing times. Among the methods compared, the weighted average demonstrates highest accuracy and second fastest processing time. Additionally, the choice of surface adjustment method has a greater impact on the accuracy of distance measurements in rougher terrain.
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影响因子:
2.9
作者:
E. L. Usery;Michael P. Finn;D. Scheidt;S. Ruhl;Thomas Beard;M. Bearden
通讯作者:
M. Bearden
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
B. Buttenfield;M. Ghandehari;S. Leyk;L. Stanislawski;Meg Brantley;Y. Qiang
通讯作者:
Y. Qiang
DOI:
--
发表时间:
2019
期刊:
ISPRS Int. J. Geo Inf.
影响因子:
--
作者:
Y. Qiang;N. Weghe
通讯作者:
N. Weghe
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
B. Schneider
通讯作者:
B. Schneider
影响因子:
3.7
作者:
T. Harms;E. Wentz;N. Grimm
通讯作者:
N. Grimm