Toposurface contour bounding box issue

[Anonymous]

Hi There,

I am new to this forum and hoping someone can help. 

I am trying to create a toposurface with some contours that are quite complex which I am importing from CAD. 

I separated the contours out into separate layers so I could add the elevation one layer at a time in revit.  When I initially started trying to convert them to a toposurface I had them all in one layer and it was working but was going to take forever with such a large area.  Once I separated them into individual layers, it then put a bounding box around the points so it was not creating the surface to the contour shape  I wanted. 

Does anyone know why this is or is there an easier way to do this?

I have attached some screen shots to try and demonstrate the issue I am having.

Thanks,

Kat

[ToanDN]

Not quite follow your workflow? @
Are you create ine topo for each contour? Why dont you simply create the topo using the Imported CAD file as a whole?

[Anonymous]

Hi,

Thanks for replying so quickly. I did try doing it as a whole however
there is no elevation data from CAD, I am inputting that when I get to
revit so it meant I had to select each def point (I think that is what they
are called) and assign an elevation. There are about 100000 points in the
data so was taking ages sto select.

Sorry I am new to creating toposurfaces in Revit and because the site is
quite complex I am not sure the best way to create the surface.

This is as far as I got and this took me 2 hours (and it's not perfect).

Thanks,
Kat

[barthbradley]

There's no elevation data???  What type of AutoCAD lines are they?  

[barthbradley]

...have you thought about elevating the contour lines in AutoCAD and re-importing it into Revit? You can then create your Revit Toposurface via Select Import Instance. 

[Corsten.Au · Accepted solution]

Hi

Clean up the file and crop only for your SITE..

its too detailed in CAD, so theres no point creating a large topo..

try to focus on the site..

If the contour lines in CAD don't have height information ( ELEVATION, Elevated)

then ask for correct Survey from your consultant.. and then go ahead..

best luck.