https://github.com/antonellodn/skyviewanalysis

A plugin for Sketchup to calculate Sky Exposure and Sky View Factor.
https://github.com/antonellodn/skyviewanalysis

Last synced: 8 days ago
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A plugin for Sketchup to calculate Sky Exposure and Sky View Factor.

• Host: GitHub
• URL: https://github.com/antonellodn/skyviewanalysis
• Owner: AntonelloDN
• License: gpl-3.0
• Created: 2019-08-13T10:50:23.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-08-14T14:51:33.000Z (over 5 years ago)
• Last Synced: 2024-11-08T14:51:47.939Z (2 months ago)
• Language: Ruby
• Homepage:
• Size: 404 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# SkyViewAnalysis

A plugin for Sketchup to calculate Sky Exposure and Sky View Factor.

![Oke svf](https://github.com/AntonelloDN/SkyViewAnalysis/blob/master/example/svf01.jpg)

## SVF:

Sky View Factor (SVFs) represents the ratio at a point in space between the visible sky and a hemisphere centered over the analyzed location (Oke 1981).

- If SVF of a point is 0 the entire sky is blocked from view by obstacles.

- If SVF of a point is 1 the entire sky is free from view by obstacles (ideal rural scenario)

There is a relation between Sky View Factor and Radiation.

for SVF = 0 :



  
there is no short-wave reflection

  
there is no long-wave nocturnal interference



for SVF > 0 :



incoming day-time short-wave reflection increases during the day

outgoing night-time long-wave radiation is reduced

incoming night-time long-wave radiation is increased

altered soil heat flux



Urban Canyon H/W and SVF relation:


  

    H/W

    SVF 

  

  

    Rural

    1.00 

  

  

    0.25

    0.89 

  

  

    0.5

    0.71 

  

  

    1

    0.45 

  

  

    2

    0.24 

  

  

    3

    0.16 

  

  

    4

    0.12 

  

reference: https://mau.hypotheses.org/271 (PAR KHARTWELL · 23/05/2017)


## Features:

- Create Sky Exposure Mask

- Create Sky View Factor Mask

- Use many times the same dome for Sky Exposure calcultation

## Setup:

Install *rbz from Sketchup Extension Warehouse.