Volume 6, no. 1Pages 112 - 123

The Algorithm for Modelling Visibility Area of Objects of the Settlement

M.D. Shley
The paper presents the results on the development of the method of assessing the visibility of the objects. This method is based on modeling ray visibility from the observer to the studied object using three-dimensional model of the settlement. The triangulation of the surface of all buildings and relief is used to determine the model of settlement. The calculation of the exact characteristic of the visibility of triangles which compose the model of the studied object is specially considered in the paper. The algorithm for modeling visibility area of objects of the settlement is proposed. On the basis of the experiments conducted to test the algorithm the optimal values of parameters were estimated. The optimality criteria for receiving the best results are the time and precision of assessment. This algorithm is implemented in the information system, which allows to analyze the visibility of some urban or rural buildings.
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Keywords
detection of visibility area, surface triangulation, visibility object assessment, set of programs.
References
1. Nagy G. Terrain Visibility. In preparation, Rensselaer Polytechnic Institute, 1994.
2. Fort M. Visibility and Proximity on Triangulated Surfaces. Available at: http://www.tesisenred.net/bitstream/handle/10803/7890/tmfm.pdf?sequence=1.
3. Pol'skiy S.V. Effektivnyy metod opredeleniya vidimosti mezhdu otrezkami na ploskosti [Effective Method to Determine the Visibility Between the Segments on the Plane]: Available at: http://www.mgul.ac.ru/journal/aiticles/000022r.zip.
4. De Floriani L., Magillo P. Algorithms for Visibility Computation on Terrains: a Survey. Environment and Planning B (Planning and Design), 2003, no. 30 (5), pp. 709-728.
5. ArcGIS Resource Center. Available at: http://help.arcgis.com/en/arcgisdesktop/10.0/help/.
6. Shley M.D., Borisov A.Yu. Metody otsenki prostranstvennykh kharakteristik sel'skikh poseleniy Karelii [Methods for Assessing the Spatial Characteristics of Rural Settlements in Karelia]. Available at: http://www.elbib.ru/index.phtml?page=elbib/rus/journal/2010/part2/SB.
7. Shley M.D., Rogov A.A., Borisov A.Y. Metody i algoritmy raspoznavaniya ob'ektov sel'skikh poseleniy na tsifrovoy karte. Matematicheskie metody raspoznavaniya obrazov (MMRO-15) [Methods and Algorithms for the Object Recognition of Rural Settlements on Digital m]. Moscow, 2011, pp. 571-574.
8. Shley M.D., Borisov A.Y. Razrabotka matematicheskoy modeli dlya rascheta prodolzhitel'nosti insolyatsii postroek i ee komp'yuternaya realizatsiya [Development and Computer Implementation of a Mathematical Model for Calculation of Insolation Duration in Buildings]. Uchenye zapiski Petrozavodskogo gosudarstvennogo universiteta. Seriya: Estestvennye i tekhnicheskie nauki, 2011, no. 6, pp. 87-90.
9. Skvortsov A.V. Triangulyatsiya Delone i ee primenenie [Delone triangulation and its application]. Tomsk, Izd-vo Tom. un-ta, 2002.
10. Avrutin V.D., Lomtev A.Yu., Rudenko V.Yu. O trekhmernoy modeli gorodskogo prostranstva Sankt-Peterburga. Chast' II [About Three-Dimensional Model of St. Petersburg Urban Space. Part 2]. Available at: http://www.atr-sz.ru/rus/itr/article/id/3Dmodel2/.
11. Koroev Yu.I., Fedorov M.V. Arkhitektura i osobennosti zritel'nogo vospriyatiya[Architecture and the Features of Visual Perception]. Мoscow, Gosudarstvennoe izdatel'stvo literatury po stroitel'stvu i arkhitekture, 1954.