PRO 7 Sun orientation
Cindy Cowgirl
8/3/09
To achieve precise shadowing for a building which is not oriented exactly north -south, is it best to;
1) rotate the building to its true orientation (then presumably change axis), or
2) Change the sun (I dont see a option in the Shadow dialog box to do this)
3) Open a new file - import the model and rotate it
Other?
Gully Foyle
8/3/09
Why not just model it on-axis and rotate it when you're done?
-Gully
George Knowles
8/3/09
Hi Renzo,
Pick No. 2)
Establish the correct path of the Sun for your location and orientation by setting the North Angle in SketchUp. This enables you
to keep your model on-axis.
Click … Window > Model Info > Location to set the Solar Orientation - North Angle.
SketchUp bearings are True Direction. There are a few places on earth where True North and Magnetic North coincide … But not many.
Example: Boulder Colorado: 9 deg. 16 min. East Variation
Annual change: 8 min. West per year
If you take field bearings with a compass at the building site, apply the proper correction for local Magnetic Variation to obtain True
Direction.
Local Magnetic Variation (also called Magnetic Declination by those who never venture on the water) can be found here:
How to apply corrections here:
Best regards,
Geo
Cindy Cowgirl
8/4/09
Nice joe lad, thanks