[GIS] returning a LineString on selecting its midpoint

Question

I have a list of shapely LineString,

[<shapely.geometry.linestring.LineString object at 0x000001614D750CC0>, <shapely.geometry.linestring.LineString object at 0x000001614D750D68>, <shapely.geometry.linestring.LineString object at 0x000001614D750D30>]

and List of point geometry which are the mid-points of the Linestrings;

[<shapely.geometry.point.Point object at 0x000001614DC0D518>, <shapely.geometry.point.Point object at 0x000001614DC0D4E0>, <shapely.geometry.point.Point object at 0x000001614DCF9CC0>]

How to return Linestring on selecting its midpoint from the second list?

Answer 1

if your linestring are not crossing each other on the mid points you can simply use intersects method from shapely

for line in lines:
     for point in points:
          if line.intersects(point):
                # you have a match

if the do intersect you can get first the mid points from the linestrings using shapely's method interpolate

mid_point = line.interpolate(0.5, normalized = True)

then you use intersects , note that these methods require that your points are exactly the mid points of your lines, if you're not sure about it you can use a buffer with a tolerance distance ( also available in shapely )