Creating a 3d contour model

[J Parkin]

Im trying to create a 3d model of a hilly site, with little success.

Waht I have done is imported a Tiff of the contour map, traced the countour lines with polygons

then used the "convert 2d polygons to 3d contours"

function.

up to this point is fine, I end up with a group of polygons layered above each other that look like a 3d model.

However none of the sitework tools work, all say ' your drawing contains no DTM"

What am I missing here? I think im doing it exactly as the manual states.

thanks

Jason

[Robert Anderson]

OK, the 3D polys you've created are the site data. Now use the Site Model... command to create a Digital Terrain Model (DTM). This DTM, once created, can be displayed in various ways in 2D and 3D, and can be analyzed and modified to create grading plans, cut-and-fill, etc.

[Guest]

Also, make sure you don't have process beds or update existing or create proposed checkmarked.

If you have proposed or update existing checkmarked, you can get a related error since currnetly, you do not have a dtm in the drawing.

Jason, if you want me to take a look at the file, you can go ahead and email it to me. I know last week was a strugle to get the DTM operational with the data.

[ 01-15-2003, 09:40 AM: Message edited by: Katie ]