Study on Forest Fire Visual Analysis Method for Extinguishing Command in Virtual Environment

doi:10.16182/j.issn1004731x.joss.22-1534

Abstract

Abstract:

Aiming at the demand of forest fire fighting command, the information required for the command, such as geographical environment, meteorological conditions, forest resources and forest fire behavior are comprehensively analyzed, and the data visualization visual analysis method in the virtual forest fire environment is designed and realized. Wang Zhengfei-3D mixed cellular automata model is used to simulate the process of forest fire spread and the difference time method is adopted to predict the forest fire spreading behavior. The change of environmental data in different interest domains is captured in real time, and the multi-view panel and overlay layers are combined to construct the visual analysis module of fire field information. The process of forest fire spread in different scenes is simulated by adjusting the environmental parameters of virtual forest scene, and the information of the fire field is visually analyzed. The experimental results show that the visual analysis method can not only more accurately predict the forest fire spread behavior under certain conditions, but also more comprehensively describe the fire field information.

Key words: 3D virtual environment, fire spreading model, visualization, visual analytics, forest fire simulation

CLC Number:

TP391

Zhang Benrun, Cao Weiqun. Study on Forest Fire Visual Analysis Method for Extinguishing Command in Virtual Environment[J]. Journal of System Simulation, 2024, 36(4): 1001-1016.

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颜色名	颜色(R, G, B, A)[0, 255]
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color2	(250, 192, 61, 255)
color3	(73, 148, 196, 255)
color4	(18, 38, 79, 255)
color5	(108, 168, 175, 255)

坡向归一化[0, 1]	坡向方位(0~360°)	颜色名
(0, 0.25]	东(0~90°)	color1
(0.25, 0.5]	南(90°~180°)	color2
(0.5, 0.75]	西(180°~270°)	color3
(0.75, 1.0]	北(270°~360°)	color4
0	平地(0)	color5

风速值归一化[0, 1]	温度值归一化[0, 1]	颜色(R, G, B, A) [0, 255]
[0, 0.1)	[0, 0.1)	(0, 180, 255, 255)
[0.1, 0.2)	[0.1, 0.2)	(0, 255, 235, 255)
[0.2, 0.3)	[0.2, 0.3)	(0, 255, 45, 255)
[0.3, 0.4)	[0.3, 0.4)	(0, 255, 135, 255)
[0.4, 0.5)	[0.4, 0.5)	(45, 255, 0, 255)
[0.5, 0.6)	[0.5, 0.6)	(135, 255, 0, 255)
[0.6, 0.7)	[0.6, 0.7)	(225, 255, 0, 255)
[0.7, 0.8)	[0.7, 0.8)	(255, 185, 0, 255)
[0.8, 0.9)	[0.8, 0.9)	(255, 100, 0, 255)
[0.9, 1.0]	[0.9, 1.0]	(255, 0, 0, 255)

森林环境信息	颜色(R, G, B, A)[0, 255]
草	(20, 220, 0, 255)
灌木	(20, 100, 0, 255)
蕨类	(150, 200, 150, 255)
针叶林	(200, 255, 130, 255)
乔木	(0, 190, 100, 255)
冰带	(150, 255, 255, 255)
河流	(11, 172, 207, 255)
山洞	(184, 156, 96, 255)
火烧迹地	(40, 40, 40, 255)
火	(220, 60, 0, 255)
无植被	(200, 200, 200, 255)

可视化方法	应用范围	最小时延/ms	最大时延/ms	平均时延/ms
林火蔓延模拟	0~60 min	16.09	40.56	24.98
火线预测	0~100 min	22.82	343.93	58.33
环境数据(森林资源、风速、温度、高程、坡度、坡向)	1 024×1 024 (栅格单元)	283.07	418.82	312.29
风向标注	64×64 (栅格单元)	10.39	22.76	14.18
指定区域划分	10×10~1 024×1 024 (栅格单元)	11.05	360.44	125.18
火场信息	指定火线	11.96	25.80	16.22
统计图表	指定区域	20.50	43.50	28.99