Revit Toposurface from dwg contours

[Shanny9]

I have a survey dwg file with 3D contours that are polylines drawn at correct elevations.

I am attempting to generate a Revit toposurface from the imported contours. 

Under "insert" I have tried both import CAD and Link CAD.  Followed by going to "Massing and Site", toposurface, create from import. I am sure to only pick the contour layer which has only contours on it. 

My toposurface essentially creates a triangle surface with only 3 points and is not reading the contour data. 

I have zero experience with Revit so this is likely something I am doing wrong.  Is there a certain template file I should be using? Or something else I am missing?

I've attached the photo that shows the green contours compared to the brown toposurface.  I also attached the CAD file containing the contours.

I have tried this with multiple different dwg files containing contours and get similar results. Please help me as I have wasted 1.5 work days on what should have been a 10 minute job.

Thanks in advance!

[ToanDN]

What is the Units of the drawing (feet or meters)?  I used feet for units when link and here is what i got.

[Shanny9]

The CAD file is meters

[ToanDN]

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@Shanny9 wrote:

The CAD file is meters

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It works the same.  Follow the steps above and choose meters instead of feet.

[Shanny9]

Wow okay! I would not have picked feet considering it is a metric file. This has definitely improved my surface creation to be much more accurate! 

Does that mean the file is now in imperial units?

Thanks You!

[ToanDN]

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@Shanny9 wrote:

Wow okay! I would not have picked feet considering it is a metric file. This has definitely improved my surface creation to be much more accurate! 

Does that mean the file is now in imperial units?

Thanks You!

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No.  If the file is metric then use meters, not feet.  The steps are the same regardless of the Units.