Hi
We have a points file to create a "bottom of peat level" surface. The only problem is, along with the X and Y, it only gives us the distance from OGL, not the actual Z Elevation at each point. How do we import these into C3D to create a surface? We have a topo survey for the whole site, so we have and EG surface.
Cheers
Martin
Solved! Go to Solution.
Solved by neilyj666. Go to Solution.
Perhaps you can get the "distances" in your point file as descriptions with "0" elevations. Once in the drawing you can have them "hop" to the Ex. ground elevation of the surface.
OK, now you are on your own.
Bjill
One never knows about the experience of the person asking questions without some guidance.
I am assuming you know how to import your points into the drawing.
1. I always insist that when importing points that you have set up a point group for them.
2. Once these points are inserted and are happily appearing in your group, select the first row (or any row) and use the Ctrl key and the A key simultaneously. All the points are selected.
3. Right Click this highlighted group in the window and select "Elevations from surface". All points are given the elevations at that location on your surface.
Now all you have to do is subtract the distances in your description to get the elevation you desire. Maybe export points out and correct in Excel, import back in.
Bill
Great, thanks for that. I know how to do all those steps, its the "subtracting the distance in the description" I do not understand, how do I get each point to move according to the individual descriptions?
Thanks again for your help
Martin
I was hoping that someone may have this in a lisp or something. But here is what I would do. By exporting these points after they have been adjusted to the existing ground elevation, it seems that you could put these points, etc in individual columns in Excel, then have the "numbers" in the descriptions subtract from the newly acquired ground elevation giving you elevation points for your new surface.
Then save these points (Pt number, X, Y, Elev) in a new ASCII file and re-import. Either delete all your old points or have the new one overwrite them.
Bill
The correct (?) way to tackle this problem is as follows (I do this regularly for this very application)
neilyj (No connection with Autodesk other than using the products in the real world)
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Brilliant, thank you so much Neily 🙂 yet again, you have helped me lots.....