Building a GeoDataFrame out of a shapely GeometryCollection with shapely 2.0.0 -> ValueError: DataFrame constructor not properly called!

Question

I successfully used to build a GeoDataFrame out of a shapely GeometryCollection (hereafter gc) as gdf = gpd.GeoDataFrame(gc) but I'm now facing this error with shapely 2.0.0:

gdf = gpd.GeoDataFrame(gc)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/geopandas/geodataframe.py", line 135, in __init__
    super().__init__(data, *args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/pandas/core/frame.py", line 781, in __init__
    raise ValueError("DataFrame constructor not properly called!")
ValueError: DataFrame constructor not properly called!

Code to reproduce the error:

import geopandas as gpd
from shapely.geometry import LineString, Point, GeometryCollection

p = Point(51, -1)
l = LineString([(52, -1), (49, 2)])
gc = GeometryCollection([p, l])

gdf = gpd.GeoDataFrame(gc)

# Previously, with shapely 1.8.5:
gdf
>:
                          0
0             POINT (51 -1)
1  LINESTRING (52 -1, 49 2)

When I print gc with shapely 2.0.0, it gives:

gc
>:
  <GEOMETRYCOLLECTION (POINT (51 -1), LINESTRING (52 -1, 49 2))>

Whereas with shapely 1.8.5 it was:

gc
>:
  <shapely.geometry.collection.GeometryCollection object at 0x7fab2c6062c0>

Also:

gdf = gpd.GeoDataFrame({'geometry':gc})

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/geopandas/geodataframe.py", line 135, in __init__
    super().__init__(data, *args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/pandas/core/frame.py", line 664, in __init__
    mgr = dict_to_mgr(data, index, columns, dtype=dtype, copy=copy, typ=manager)
  File "/usr/local/lib/python3.10/site-packages/pandas/core/internals/construction.py", line 493, in dict_to_mgr
    return arrays_to_mgr(arrays, columns, index, dtype=dtype, typ=typ, consolidate=copy)
  File "/usr/local/lib/python3.10/site-packages/pandas/core/internals/construction.py", line 118, in arrays_to_mgr
    index = _extract_index(arrays)
  File "/usr/local/lib/python3.10/site-packages/pandas/core/internals/construction.py", line 656, in _extract_index
    raise ValueError("If using all scalar values, you must pass an index")
ValueError: If using all scalar values, you must pass an index

Therefore, how to properly build a GeoDataFrame from a shapely GeometryCollection in GeoPandas with shapely 2.0.0?

Version info:

• geopandas 0.12.2
• pandas 1.5.3
• shapely 2.0.0

Answer 1

A GeoDataFrame needs a geometry field (if not, it is a DataFrame). Therefore the correct method to create it is:

gdf = gpd.GeoDataFrame({'geometry':gc})
print(gdf)
                                       geometry
0                         POINT (51.00000 -1.00000)
1  LINESTRING (52.00000 -1.00000, 49.00000 2.00000)

Note that print gc with shapely 1.8.5 and 2.0.0 is equivalent

gc
<shapely.geometry.collection.GeometryCollection object at 0x11f0eb2e8>

but

print(gc)
GEOMETRYCOLLECTION (POINT (51 -1), LINESTRING (52 -1, 49 2))
# or
gc.wkt
'GEOMETRYCOLLECTION (POINT (51 -1), LINESTRING (52 -1, 49 2))'

Answer 2

Building a GeoDataFrame out of a shapely GeometryCollection is done as follows with shapely >= 2.0.0:

gdf = gpd.GeoDataFrame(gc.geoms)
gdf
>:
                          0
0             POINT (51 -1)
1  LINESTRING (52 -1, 49 2)

See also: Access individual elements of a GeometryCollection with shapely >= 2.0.0