Elevation value of topography point is 25m lower than the actual elevation

[Anonymous]

I successfully created a topography with accurate elevations and coordinates however when I wanted to define the 'graded Region' and change elevation of the points, I figured all the points are consistently 25 m below the actual value. 

Surprisingly, in sections and when I link other CAD files, the elevation is correct. It is only the point that shows incorrect value.

I hope someone can tell me why.

[RDAOU]

@Anonymous 

Because the elevations of the Toposurface Points are Absolute...They relate to the level the topography was first created/hosted to.

When you place new points you are given the option to either place them as Absolute of Relative to an existing toposurface.

Edit: check this link maybe it is of interest to you https://knowledge.autodesk.com/support/revit-products/troubleshooting/caas/CloudHelp/cloudhelp/2019/...