I am trying to buffer points which are quite close together, and then dissolve the overlapping buffer polygons into larger polygons. After doing the buffer is where I have the issue. I have tried using dissolve('geometry') but that gives this error.

KeyError: 'geometry' 

I think the proper way to do this is using unary_union but my output is a multipolygon and I cant use it.

gdf2 = gpd.read_file(SELECT)
gdf2b = gdf2.buffer(gridDist)
gdfu = gdf2b.unary_union

AttributeError: 'MultiPolygon' object has no attribute 'plot'

Or if I try to send the unary_union to a file

gpd.GeoSeries.to_file(gdf3u, BUFF1, driver="ESRI Shapefile")

AttributeError: 'MultiPolygon' object has no attribute 'index'

So my question is how can I either dissolve these polygons based on their self intersecting geometry and have the result be a geodataframe or a geoseries? Or how can I transform the multipolygon I have from into a geodataframe?

Plot of buffered points

1 Answer 1


Put the geometry into a new GeoDataFrame, that's what has the .plot() method.

new = gpd.GeoDataFrame(crs=gdf2.crs, geometry=[gdfu])

then you can write out the new object

  • Thanks So Much! I know this is simple but I couldnt find how to make a geodataframe from geometry in the geopandas documentation! It should be right up there with geodataframe.from_file
    – JakeGIS
    Commented Jun 7, 2018 at 20:28

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