Where do the coordinates come from for the Boundary Segments?

[Anonymous]

When calling for the GetBoundarySegments() on a Room, we get the segments. All fine, but where do these coordinates come from? I tried changing the 

Survey and Project Base Points but the Boundry Segments curves kept being the same...

I would like to somehow get the Boundry Segments based on a scopebox. We have views that we export as PNG with a scopebox applied, so we only see the building in the scopebox. I would like to get the boundries relative to that scopebox so that i could create an svg which i could place over the exported floorplan. Thats why i am interested in knowing on what the coordinates in the boundary segments come from.

[Anonymous · Accepted solution]

These are the absolute coordinates based on the fixed grid. (like WCS in CAD)

They are for the greater good of the Americans in feet (!) So you will have to convert them to something useful when working with em.

These coords are hidded from the common Revit user and the survey and project basepoint simply perform a transaction on these when reading them through spot coordinate. So you will have to do the same if you want to read the world coordinates. However they match the coordinates on the Ga's and sections so you might not need to.