Line Offset

Takes a linestring or multilinestring and returns a line at offset by the specified distance.

Example

import json
from geojson import MultiLineString, Feature
from turfpy.transformation import line_offset
ls = Feature(geometry=MultiLineString([
     [(3.75, 9.25), (-130.95, 1.52)],
     [(23.15, -34.25), (-1.35, -4.65), (3.45, 77.95)]
 ]))
lo = line_offset(ls, 2, unit='mi')
print(json.dumps(lo, indent=2, sort_keys=True))

{
  "geometry": {
    "coordinates": [
      [
        [
          3.748342,
          9.278899
        ],
        [
          -130.951658,
          1.548899
        ]
      ],
      [
        [
          23.172299,
          -34.231543
        ],
        [
          -1.320442,
          -4.640314
        ],
        [
          3.478898,
          77.948321
        ]
      ]
    ],
    "type": "MultiLineString"
  },
  "properties": {},
  "type": "Feature"
}

Interactive Example

from ipyleaflet import Map, GeoJSON, LayersControl

original = GeoJSON(name='Original', data=ls)

rotated = GeoJSON(name='Offset Line', data=line_offset(ls, 2, unit='mi'), style={'color': 'red'})

m = Map(center=[33.54139466898275, 7.536621093750001], zoom=1)

m.add_layer(original)
m.add_layer(rotated)

control = LayersControl(position='topright')
m.add_control(control)
m