how to vectorize closed line

2017 10 25
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更新时间：2017 10 25
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Hi there!! I am beginner and I wonder about vectorization.
I get contour line from topographic map. and now, I try to vectorize each contour line.
When I search about vectorize, I just find about low vector and column vector. I don't want that information.
How can I vectorize contour line? please refer my image

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KSSV
KSSV 2017-10-25
What do you mean by vectorizing contour line?
Stephen23
Stephen23 2017-10-25
What exactly do you expect if you "vectorize each contour line" ?
What would the output be ?
Kwanghun Choi
Kwanghun Choi 2017-10-25
actually, I don't understand what vectorization mean. My final goal is input elevation as z value. but It is impossible to input elevation at each contour manually.
I refer some paper, and these say that vectorization is first step, and input elevation is next. that is why I am looking for vectorization.

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