IPSJ SIG Technical Report Vol.2014-HCI-158 No /5/22 1,a) 2 2 3,b) Development of visualization technique expressing rainfall changing conditions

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1 1,a) 2 2 3,b) Development of visualization technique expressing rainfall changing conditions with a still picture Yuuki Hyougo 1,a) Hiroko Suzuki 2 Tadanobu Furukawa 2 Kazuo Misue 3,b) Abstract: In order to prevent rain disasters bringing serious damage, it is important to grasp the situation and understand the expansion of the rain area. We developed a technique of expressing the area where rain falls and the direction of movement of the affected area. This technique is based on rain mesh data and uses a still image. The developed technique expresses the direction with arrows and shows the values of rainfall or rainfall accumulation with colors. Therefore, it is possible to express the rain data (which is time-series data with location information) using a still picture, without being dependent on animation. Using this technique, it becomes easy to perform decision-making and communication of information between fire brigade members. Keywords: visualization, geospatial information, meteorological data 1. 1 Graduate School of Systems and Information Engineering, University of Tsukuba 2 Fujitsu Laboratories Ltd. 3 Faculty of Engineering, Information and Systems, University of Tsukuba a) hyougo@iplab.cs.tsukuba.ac.jp b) misue@cs.tsukuba.ac.jp 1

2 2. 3 Laidlaw [5] Laidlaw [1] 3 [2] AMeDAS Field [3] Turk [4] Streamline

4. X MP * 1 X MP C 1 250m [mm/h] X Y time count x y time count = t i j r i,j (t) time count 16 16 60time count 1 time count 3 5. 1 2 5.

3 4. X MP * 1 X MP C 1 250m [mm/h] X Y time count x y time count = t i j r i,j (t) time count time count 1 time count i j L i,j (t) L i,j (t) = t max{s r i,j (s) > 0, s t} (1) 1 L i,j (t) V i,j (t) ( w w Li,j (t) L i+k,j+l (t) ) ( ) k V i,j (t) = (2) k2 + l 2 l k= w l= w w (i±w, j ±w) *1 1: w = 2 L i+k,j+l (t) 0 (k, l) A i,j (t) A i,j (t) = t i=t l r i,j (i) u 60 (3) u u = 3[min] time count = t r i,j (t) V i,j (t) A i,j (t) time count ( 1 ) MONOCHROME ( 2 ) COPYSAFE ( 3 ) JMA 3

215, 48, 31 4 RGB JMA 24 5 *2 8 5.2.2 time count = t {(i, j) r i,j (t) = 0, L i,j (t) B} B 1 5.1 *2 www.jma.go.

4 2: 3 MONOCHROME 0.01[mm/h] 100[mm/h] HSB COPYSAFE 10[mm/h] 254, 240, [mm/h] 253, 204, [mm/h] 252, 141, 89 60[mm/h] 215, 48, 31 4 RGB JMA 24 5 * time count = t {(i, j) r i,j (t) = 0, L i,j (t) B} B *2 3: L i,j (t) A i,j (t) Processing *3 controlp5 *4 Library 6.2 time count = 0 MONOCHROME TIMECOUNT time count *3 *4 4

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6 8. [1] : AWvis (, ) : Vol. 35, No. 5, pp (2013). [2] GMT (,, ). IA, Vol. 109, No. 351, pp (2009). [3] Field, D. J., Hayes, A. and Hess, R. F.: Contour integration by the human visual system: Evidence for a local association field Vision research, Vol. 33, No. 2, pp (1993). [4] Turk, G. and Banks, D.: Image-guided streamline placement, Proceedings of the 23rd annual conference on Computer graphics and interactive techniques, ACM, pp (1996). [5] Laidlaw, D. H., Davidson, J. S., Miller, T. S., da Silva, M., Kirby, R., Warren, W. H. and Tarr, M.: Quantitative comparative evaluation of 2D vector field visualization methods, Proceedings of the conference on Visualization 01, IEEE Computer Society, pp (2001). 6

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