contour type import

I would really like to import a contour type plot as a surface. Two
problems as I see it. First it is a ton of data and how best to map a
surface to that...Second (and probably the bigger of the two) is the
size. This happens to be several square miles and I know out of
solidworks modeling extents for a part. Any ideas on how to work with
something like this?

I know not really typical for solidworks, but I have a project that
simply does lend itself to a 3d type review. I have data in autocad
but is almost useless for the information I want out of it. Basically
to determine the volume of a pretty big material dump.

I have thought about scaling into the right extents, but am still left
with applying the surface to the contour lines.

Just wondering if anyone has any ideas?

 

actually think I answered my own question. I found a tool that will
convert the autocad contour plot to X, Y, Z data (for free) and this
resultant file is usable by the scan import tools. these tools also
provide methods to map a surface through them. So it looks like I am
able to get a 3D surface for my uses with just a few hours processing
time. Hey I am working with half a million points.....so I wouldn't
expect it to be too fast.

--Matt