North Orientation


#1

How do you determine North Orientation for shadows to be accurate?


#3

North is only one of four parameters you must set to display shadows that accurately portray the real world.
• Geographic Orientation — Relationship of True North to the model.
• Geographic Location — Latitude and Longitude
• Time — Year, Month, Day, Hour and Minute
• UTC Offset — The difference between local time and the Coordinated Universal Time standard.

By default, the +Y solid green Axis is true north to the shadow engine.
However, the +Y Axis is no longer true north if you geo-locate the model via SketchUp’s Add Location.

I find the simplest, most direct approach to shadow analysis is to manually geo-locate the model.
Window > Model Info > Geo-location > Set Manual Location
Then…
• Build the model along the Default Axes.
• Install the Solar North plugin (SketchUp Pro only) if you haven’t already done so.
• Use the Solar North tools to set true north in relation to the model.


Solar Modeling - How to
Shadow Timezones
#4

Thanks - great explanation.


#5

I also use manual location the most. Often I have no interest of the imagery, and I don’t want to have to manually restore true north to the Y axis as a separate step. It’s a pity that the Add location feature is designed in such a way that we both prefer to entering the coordinates ourselves :confused: .


#6

This well could be implemented in an extension😃?


#7

Nah, extensions are great for adding new functionality, especially if oustide or at the edge of the scope of the main program. When a native feature however isn’t ideal I think it’s better to polish it a bit than stacking it with a similar feature that has to be rewritten from scratch.