type 1,2,3 civilization.Look at article about wind cultures . also, read the Kardavesh scale article..to access the files move the mouse arrow. ove rthe spot indicated to the right side here below
The true height of any universal spirals by Henryk Szubinski
The true height of the spiral hole is 8mh because depending on the position of measurement about this spiral hole the vectors have to be taken as their sum because there is no relative height vector.