id |
ecaade2017_240 |
authors |
Al-Sudani, Amer, Hussein, Hussein and Sharples, Steve |
year |
2017 |
title |
Sky View Factor Calculation - A computational-geometrical approach |
source |
Fioravanti, A, Cursi, S, Elahmar, S, Gargaro, S, Loffreda, G, Novembri, G, Trento, A (eds.), ShoCK! - Sharing Computational Knowledge! - Proceedings of the 35th eCAADe Conference - Volume 2, Sapienza University of Rome, Rome, Italy, 20-22 September 2017, pp. 673-682 |
doi |
https://doi.org/10.52842/conf.ecaade.2017.2.673
|
summary |
Sky view factor (SVF) is a well-known parameter in urban-climatic studies, but there is a lack of consensus on its effectiveness, especially with regard to the interpretation of changes in urban air temperatures. This led the authors to develop the new concept of the partial sky view factor (SVFp), which showed promise in a previous study. The objective of this study is to save the time associated with manual methods of calculating SVF and SVFp by developing a Rhino-Grasshopper component to quantify them via the hemispheric projection of a 3D model. In addition, a different approach, in terms of a hemispheric projection to calculate SVF, will be introduced by another component, and the pros and cons of each approach are considered. We will name these methods 'Ray Method' and 'Geometrical Method' respectively. The Ray Method has achieved a good balance between accuracy, processing time and urban scale and complexity compared to the Geometrical Method. |
keywords |
Sky view factor; parametric design; Rhino - Grasshopper; urban morphology; partial Sky view factor |
series |
eCAADe |
email |
|
full text |
file.pdf (8,357,398 bytes) |
references |
Content-type: text/plain
|
Al-sudani, A. and Sharples, S. (2016)
Analyzing urban microclimate air temperature measurements using a novel parameter - the partial sky view factor
, Proceedings of the 32nd International Conference on Passive and Low Energy Architecture (PLEA), Los Angeles, p. 1239-1245
|
|
|
|
Chen, L, Ng, E, An, X, Ren, C, Lee, M, U, Wang and Z, He (2012)
Sky view factor analysis of street canyons and its implications for daytime intra-urban air temperature differentials in high-rise, high-density urban areas of Hong Kong: A GIS-based simulation approach
, International Journal of Climatology, 32, pp. 121-136
|
|
|
|
Gál, T., Lindberg, F. and Unger, J. (2009)
Computing continuous sky view factors using 3D urban raster and vector databases: Comparison and application to urban climate
, Theoretical and Applied Climatology, 95(1-2), p. 111-123
|
|
|
|
Johnson, G.T. and Watson, I.D. (1984)
The determination of View-Factors in Urban Canyons
, Journal of Applied Meteorology and Climatology, 23(2), p. 329-335
|
|
|
|
Krüger, E.L., Minella, F.O. and Rasia, F. (2011)
Impact of urban geometry on outdoor thermal comfort and air quality from field measurements in Curitiba, Brazil
, Building and Environment, 46(3), p. 621-634
|
|
|
|
Lin, Tzu-Ping, Tsai, Kang-Ting, Hwang, Ruey-Lung and Matzarakis, Andreas (2012)
Quantification of the effect of thermal indices and sky view factor on park attendance
, Landscape and Urban Planning, 107, p. 137-146
|
|
|
|
Oke, T.R. (1988)
Street design and urban canopy layer climate
, Energy and Buildings, 11, p. 103-113
|
|
|
|
Paramita, Beta, Kamilia, Ismahnida, Nurhidayat, M.Iqbal and Ocktaviyane, Resty Ocktaviyane (2016)
Optimization of Design and Planing VHS Building Using Chronolux
, Indonesian Journal of Science & Technology, 1(2), pp. 170-184
|
|
|
|
Steyn, D.G. (1980)
The calculation of view factors from fisheye?lens photographs: Research note
, Atmosphere-Ocean, 18(3), p. 254-258
|
|
|
|
Unger, J. (2009)
Connection between urban heat island and sky view factor approximated by a software tool on a 3D urban database
, International Journal of Environment and Pollution, 36, pp. 59-80
|
|
|
|
Wu, j., Zhang, Y. and Meng, Q. (2013)
Calculation method of sky view factor based on rhino-grasshopper platform
, Proceedings of BS 2013: 13th Conference of the International Building Performance Simulation Association, Chambéry, France, pp. 2658-2666
|
|
|
|
Zwolinski, a. and Jarzemski, M. (2015)
Computing and monitoring potential of public spaces by shading analysis using lidar data in 3D city models
, ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Berlin, Germany, p. 743-750
|
|
|
|
last changed |
2022/06/07 07:54 |
|