ValueError: Unknown geometry type: featurecollection upon upgrade to 0.7

I was using geopandas 0.5.1 and upgraded to 0.7 to be able to use missing_kwds, but upon doing that, a part of the code that was working fine stopped working:

mrgd = pd.concat([mrgd,df_missing])

This is the line giving me an error, which is:

ValueError: Unknown geometry type: featurecollection

[JoyMonteiro]

I faced the same problem. What I was doing wrong was assigning geometry from another geodataframe incorrectly. I was doing something like this

def get_geometry(location):
     return a[a['Location'] == location].geometry

b.geometry = b['Locations'].map(get_geometry)

what worked for me was

def get_geometry(location):
     return a[a['Location'] == location].geometry.values[0]

b.geometry = b['Locations'].map(get_geometry)

[martinfleis]

@BradyHu not much. It seems that there is featurecollection somewhere in your geometry column. GeoPandas now requires all values in geometry to be either shapely.geometry or missing. How did you generated tmp?