>> I tried already for each point interpolating between the two nearest
>> contours but it leads to not a very smooth result (jumps and sharp
>> angles). Does anyone know a better way to do this that would lead to a
>> smooth looking surface?
>
> I think such a thing has been posted here once, basically an
> iterative 2d process starting with an height field (image) that has
> the known heights at the contour lines seeded and is then smoothed over
> and over again (and in each step the contour heights are restored).
>
> It sounds like an stbenge thing to me ;) but I can't seem to find it.

Sounds interesting, should be able to add something like that in to my 
existing code to have a play with that idea. If I end up with anything 
remotely useful I'll post it, it's in C# though.

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