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lovemyliwu/shapely_linestring_cases.md

Last active December 29, 2023 09:14
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shapely 线段操作
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shapely_linestring_cases.md
  1. 平移
>>> line=shapely.LineString([(0,0.3), (0.3,0)])
>>> line.parallel_offset(0.13, side="right")
<LINESTRING (0.092 0.392, 0.392 0.092)>
  1. 计算弧度radian，角度angle
origin=(0,0)
point=(1,1)
radian=math.atan2(point[1]-origin[1], point[0]-origin[0])
angle=radian*180/math.pi
  1. 延长线段100长度
line=shapely.LineString([origin, point])
new_point = (origin[0]+line.length+100, origin[1])
new_line=shapely.LineString([origin, new_point])
rotate(new_line, radian, origin=origin, use_radians=True)

交换origin和point可以在另一方向延长

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