Change Toposurface elevation

[cadedu22]

Cheerz,

Probably easy one, but yet can't find correct way to do it, beside dragging it with click or arrows...

What is correct way to change elevation for topo surface?

As I understand it's set by default to elevation - 0

[barthbradley · Accepted solution]

Just move it down.  That's the correct way to do it.  

[cadedu22]

Well, that works, yet kind odd that there are no simple elevation assignment option for plane toposurface...

Thanks

[RDAOU]

@cadedu22 

Sites in general are based on survey points relative to a coordinate system rather than Level Datum...

A toposurface in Revit is a surface generated either from a coordinates file (a csv or a dwg) or from points placed in Revit. The Elevation(s) of the latter is absolute ie: relative to the Internal Origin (Additional points may be placed relative to another toposurface)

In either cases, the Level datum are irrelevant  (especially when that site is not a flat plane.