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Formula Public Spaces, 3-30-300
What is the formula for the calculation of public spaces?
In the turtorial it is described as 'Add a Combo Overlay to combine the results together, and flip the results. Any location in which any of the described conditions can be found is not public. Any place where not of the described conditions are found can be considered public space.'
Comments
Hi there!
If you have access to our Preview environment, I recommend taking a look at the Demo 3-30-300 Project in the Editor to inspect the Overlays (Specifically the Public Space Overlay) and see the calculation in action. The Demo Project will be part of our next major LTS release, at which point it will be accessible for everyone.
In your post, you reference this part of the documentation:
https://previewsupport.tygron.com/wiki/Demo_3-30-300_Project#Public_space
The determination of Public Space is intentionally left a little vague, as the definition and handle of Public Space can vary between use-case and organization. In this demo, the 3 preceding Overlays all look for some qualification which would mean a particular location is NOT public space. These results can be ADDed together. Using a GT (Greater Than), you can reduce this to a 1 (something was found which makes this private) or 0 (nothing making this private was found.) It's then possible to "flip" this result into being a 0 or a 1 respectively instead. Such as NEQ( ... , 1 ).
A net resulting formula could be of the form: NEQ( GT( ADD( A, B, C), 0) ,1 )
Or could even be shorter when written in the form: EQ( ADD( A, B, C ), 0 )