How to convert a multipolygon to multilines with Python?

Question

How can I convert MultiPolygon to Multiline?

I want to work with the boundary of multipolygon. In R I can just do :

as(my_multi_polygone, 'SpatialLines')

But I don't know how to do it in Python?

Look at the Shapely library and here : https://gis.stackexchange.com/a/277262/93097 — J. Monticolo, Feb 08 '19 at 18:27

score 1 · Accepted Answer · answered Feb 08 '19 at 23:22

1

If multip is the collection of polygons representing the MultiPolygon collection.

multiLines = shapely.geometry.MultiLineString([x.exterior for x in multip])

answered Feb 08 '19 at 23:22

saph_top

Thanks @saph_top it work but i make for iteration on the geometry of multipoly. multiLines = shapely.geometry.MultiLineString([x.exterior for x in multip.geometry]) – Elite Feb 09 '19 at 20:59

1 Answers1