How do I calculate the percentage of a line which falls in each of my multiple ring buffers?

Question

I have lines around which I have created multiple ring buffers at several intervals. I have another line (call it the flight line) which in theory should overlap the original line. I need to work out how much of the flight line falls within each of the buffers of the original line. See attached picture.

So, my plan of attack was to do an intersect of the flight line with the buffer, creating a point output. I was then planning to do a 'Split Line at Point' then using the attribute table to work out the lengths.

However, when I do the intersect, points are not created at all of the intersections with the buffer, just some of them, randomly.

Any ideas what I am doing wrong? Or is there an easier way to do this?

Answer 1

Why do you want to create a point output? Do the following:

• add a field and calculate the length of the "fligth line"
• intersect the "flight line" with the "buffer polygon"
• dissolve the "flight line buffer polygon line" depending on the "buffer polygon"
• calculate the length of the "flight line buffer polygon dissolve line"
• devide the length of the "flight line buffer polygon dissolve line" by the original length of the line