An efficient multiple scanning order algorithm for accumulative least-cost surface calculation
An efficient multiple scanning order algorithm for accumulative least-cost surface calculation
复制标题
一种高效的多扫描顺序累积最小成本曲面计算算法
DOI:
10.1080/13658816.2022.2052885
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发表时间:
2022
影响因子:
5.7
通讯作者:
Wang, Zekun
中科院分区:
文献类型:
--
作者:
Yao, Yuanzhi;Shi, Xun;Wang, Zekun
The least-cost surface (LCS) calculation is a compute-intensive problem conventionally solved by the queue-based Dijkstra’s algorithm. Alternative raster-based scanning algorithms have also been proposed which use a moving window to scan the whole study area iteratively. Here we propose improvements to the raster-based algorithms. The main improvement is to implement multiple scanning orders (MSO) to replace the conventional single scanning order (SSO, typically from upper-left corner to lower-right corner, row by row). We compared the performance of different algorithms over different cost surfaces and with different numbers of source points. The comparison shows that a raster-based algorithm adopting MSO has a substantially better performance than a conventional raster-based algorithm using SSO. An MSO raster-based algorithm is generally comparable to the queue-based Dijkstra’s algorithm, and surpasses the latter over a relatively simple cost surface (e.g. in which the cost is resampled) and/or when the number of source points is relatively large. Our empirical experiments suggest that MSO reduces the time complexity from totoAdditionally, we found that the MSO raster-based algorithm can be easily parallelized using shared-memory parallel programming.
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DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
W. A. Hassan;S. Elsheikh
通讯作者:
S. Elsheikh
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
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通讯作者:
R. Lathrop
影响因子:
13.5
作者:
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通讯作者:
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DOI:
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发表时间:
2001
期刊:
ACM SIGSPATIAL International Workshop on Advances in Geographic Information Systems
影响因子:
--
作者:
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通讯作者:
D. Urban