[Solved] parallel_offset changes number of point in LineString(Shapely)

Shiv Krishna Jaiswal Asks: parallel_offset changes number of point in LineString(Shapely)

import matplotlib.pyplot as plt
import pandas as pd
from shapely.geometry import LineString
from shapely.geometry.base import JOIN_STYLE

path = [
    dict(x=0, y=0),
    dict(x=1, y=0),
    dict(x=2, y=0),
    dict(x=2, y=4),
    dict(x=2, y=6),
    dict(x=2, y=8),

path = pd.DataFrame(path)

a = LineString(path[['x', 'y']].to_numpy())
b = a.parallel_offset(1, side='right', join_style=JOIN_STYLE.mitre)

plt.plot(path.x, path.y, '*-', label='old')

x = b.xy[0]
y = b.xy[1]
plt.plot(x, y, '*-', label='new')



We find that number of points in x is not same number of points in path. Is there a way to shift line segments parallel to itself while preserving the number of points on connected line-segment.

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