Interpolation of contour lines
Hi and welcome to AutoDesk Forum,
i doubt that you can get such service directly from autocad. maybe with outsource help routines or another software.
Imad Habash
Welcome to these Forums!
That could probably be done with an AutoLisp routine. In fact, there may be something around these Forums about that already -- here's something closely related, and this is even closer though it only steers you in a direction, without providing a fleshed-out solution [I'll let you do more Searching]. But there are important questions:
What are the contour lines? LWPolylines? 3D Polylines? Splines? Something else like a Civil3D specialty object of some kind?
Are they always parallel to the World Coordinate System plane?
If they're Polylines, would adjacent contour lines always have the same number of vertices [or if Splines, the same number of fit points], and would the interpolation be straight between vertices [/fit points]? That doesn't seem likely, but see my input in the second link above for more about that -- subdividing equally along the overall length, rather than interpolating between vertices themselves, etc.
Kent Cooper, AIA 
@Kent1Cooper wrote:
.... there may be something around these Forums about that already -- here's something closely related, and this is even closer ....
And here is another I just ran across, that makes an average between two path objects. I haven't tried it or investigated its code, but I imagine it could be altered to run multiple times, finding vertex or fit-point locations at 0.2 x the distance between locations on the path objects, then 0.4 x, etc., to fill in all your intervals.
Kent Cooper, AIA
