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I have two vector shapefiles (polylines), and I want to find all the points where they intersect. I want to produce a set of points where the intersections occur.

If it helps, the context here is that I am trying to find locations where a satellite orbit crosses a river.

I know I can use v.select in GRASS GIS to do this, but it just selects the overlapping features - what I want is (x,y) coordinates of the exact overlapping locations.

jschap1
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  • I have written these. It is basic line intersection with Y=mX +b, and see if the X and Y is contained in the segment. Special conditions when M==infinity and 0 apply. And then loop over all the segments. I suppose knowing the language needed woudl help, and my files are coming in as complex with real/img being lat and long. I think you may need to “roll your own” here…. – Holmz Jan 13 '23 at 14:55

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