CODEWITHSUNDEEP
pythonpandasshapefilegeopandas
Dervin Thunk
Dervin Thunk

Reputation: 20119

geopandas: how do I merge information only if point is inside a polygon?

I have a geopandas dataframe A with the geometry field set to a single Point (x,y). Then I have a second dataframe B with the geometry field set to some polygon and some other information. For example:

A 
geometry 
(1,2)
(3,4) 
...

and 

B
info    polygon
ab      <some polygon>
bc      <some other polygon>
...     ...

How do I add a new column to A with B's info field only if the point in A is inside the polygon in B?

I would like to end up with something like

A
geometry    info
(1,2)       ab
(3,4)       ab
(7,9)       bc
...         ...

Upvotes: 1

Views: 1245

Answers (1)

Dervin Thunk
Dervin Thunk

Reputation: 20119

Just in case someone else needs it, and assuming your geometry is well-formed, then you can do:

new_df = gpd.sjoin(A,B,how="inner", op='intersects')

this was enough.

Upvotes: 2

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