cartagen.inflexion_points

inflexion_points(line, min_dir=120.0)

Detect inflexion points inside a curved line.

This algorithm extract inflexion points from a line using angles calculation. Micro inflexions are removed.

Parameters:

• line (LineString) – The line to extract the inflexion points from.

• min_dir (float, optional) – The minimum direction change (in degrees) between two consecutive inflexion points. This parameter allows to remove micro inflexions from the results. If set to 0, every micro-inflexions will be kept.

Returns:

list of int – A list of index of the line vertices considered to be inflexion points

Examples

>>> line = LineString([(0, 0), (1, 1), (2, 0), (5, 3), (8, 5)])
>>> c4.inflexion_points(line)
[2, 3]

(Source code)