question about how height of building on slope is determined

[TheHunt]

I am doing a diagram of this building
https://en.wikipedia.org/wiki/Oxygen_Towers

the building is 110m tall but it is on a slope such that the tallest part of the building is on the highest end of the road. How would the height have been determined?



would the 110m be the height of the red line or the blue line?

furthermore, can anyone offer advice on how to visually show a slope in a diagram or perhaps point to some examples of other diagrams of buildings on slopes?

[Anders Franzén]

When doing a drawing I would want to include the whole building, from the lowest lying entrance if not the structural bottom.
However, I don't know if 110 m is the red or blue line in your case. You have to get a facade drawing.

I've done many drawings for buildings in Hong Kong, which have many buildings on slopes. I usually include some representation of terrain in my drawings:

https://skyscraperpage.com/cities/?buildingID=7337
https://skyscraperpage.com/cities/?buildingID=98002

Damien Koh went another route, omitting the terrain:

https://skyscraperpage.com/cities/?buildingID=7723

[WhipperSnapper]

Height of a building is measured from the main floor where the main entrance/lobby is located. That doesn't work if you want to draw the slope beneath the main floor. Just gotta pick either height or drawing. A description that provides how the height was measured can always be provided

[koops65]

Show the entire building, worry about the terrain later...