Use files to create an instant toposurface

If you can obtain a csv (Points File) from the surveyor which contains coordinate points, this can be used to create a Revit topography surface.

If you can obtain a dwg with contours (polylines at proper Z elevations) you can import that and use the Import Instance function to create a toposurface. Keep in mind that the contours usually come in at the geodetic height unless otherwise edited. You may want to bring it closer to a zero Z elevation in AutoCAD before importing it for easy use.

If you choose to use a dwg with polyline contours as the topography base do the following things...

Open the dwg in AutoCAD and isolate the layer with the contours

Erase any non-essential info

purge, audit and save the dwg

In Revit:

Start the Toposurface Tool

Import/Link CAD Formats-Choose the contour dwg

Click Use Imported from the sidebar menu

Select Import Instance

Finish Sketch