Combining Surfaces in C3D 2009 or LDD 2005

[coolvoodoo]

Here is the problem:
We have original surface x,y,z, point data for a large surface (call it Surf1).
We built Surf1 and created a TIN consisting of 3D lines.
We then added as-built data by building the as-built surfaces (call them Surf2, 3, and 4) and creating TINs consisting of 3D lines and adding them to Surf1 by removing the 3D lines from the as-built areas on Surf1, adding the 3D lines for those areas from Surf2, 3,and 4, and rebuilding the surface (call it Surf5).
We now have data (x,y,z point data and 3D breaklines) for an additional area (call it Surf6) adjacent to one side of Surf5.
Using Autocad LDD 2005, I am looking for the most efficient way to add Surf6 to Surf5.

To put it simply:
Using Autocad LDD 2005, I am looking for the most efficient way to add additional surface data consisting of 3D points and breaklines (or 3D TIN lines) to a surface consisting of 3D TIN lines?

We have Civil 3D 2009 if there is a better way in C3D 2009 to build this surface and export it back to LDD 2005.

Thanks!

Den Holmes
Advanced Geomatics Engineering

[gandocadguy]

We have Civil 3D 2009 if there is a better way in C3D 2009 to build this surface and export it back to LDD 2005.

In C3D you can just paste them together. Then export the surface via xml or some format LDD 2005 reads.

[jmeyer.186809]

using either software all you have to do is paste them all together. don't start cutting and redefining. you will end up with holes in your surface. Just create surf 1 and paste into it surf 2,3,4,5,6 and so on. Just remember to always paste the smaller into the bigger.

[brian.hailey933139]

Just remember to always paste the smaller into the bigger.
I think a better way of saying this is paste the correct surface into the incorrect surface which is typically the smaller into the bigger.

[jmeyer.186809]

I think a better way of saying this is paste the correct surface into the incorrect surface which is typically the smaller into the bigger.

I guess you could say that but not always the case. Thats why I said paste the smaller into the larger. It covers all senerios that I can see. Sometimes one might want to revised and go back or forward into proposed dtm's for calculations or revised dtm's for what if senerios. Not always right or wrong but for the most part....your right. Just don't try to paste a big "old surface into a small "new" surface. lol your tin will be patchy.

[brian.hailey933139]

Just don't try to paste a big "old surface into a small "new" surface. lol your tin will be patchy.
I would definitely agree there.