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AttributeError: 'Series' (or DataFrame) object has no attribute 'to_crs' when using dask_geopandas to reproject to new CRS #315

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@dluks

Description

@dluks

Description

I am experiencing an issue when trying to reproject a dask_geopandas.GeoSeries or dask_geopandas.GeoDataFrame to a new CRS. The set_crs and to_crs methods return an AttributeError indicating that the Series or DataFrame object has no attribute set_crs or to_crs.

I'm guessing this has to do with the fact that the geometry was created using dask_geopandas.points_from_xy, though even when I compute the GeoDataFrame, save it to disk, and re-read it using dask_geopandas.read_parquet, the issue still persists.

Code to reproduce

import pandas as pd
import dask.dataframe as dd
import dask_geopandas as dgpd

df = pd.DataFrame(
    {
        "value": [1, 2, 3],
        "decimallatitude": [34.05, 36.16, 40.71],
        "decimallongitude": [-118.24, -115.15, -74.00],
    }
)

ddf = dd.from_pandas(df, npartitions=2)

geom = dgpd.points_from_xy(
    ddf, "decimallongitude", "decimallatitude", crs="EPSG:4326"
)

ddf["geometry"] = geom

ddf = dgpd.from_dask_dataframe(ddf[["value", "geometry"]])

geom = geom.to_crs("EPSG:6933")  # <-- returns AttributeError
ddf  = ddf.to_crs("EPSG:6933")  # <-- also returns AttributeError 

Error Message

The following error is raised when attempting to use to_crs on geom alone:

AttributeError: 'Series' object has no attribute 'to_crs'

And on ddf:

AttributeError: 'DataFrame' object has no attribute 'to_crs'

Expected Behavior

I expect the to_crs method to reproject either a dask_geopandas.GeoSeries or dask_geopandas.GeoDataFrame to the new CRS without raising an error.

System Information

python: 3.11
dask-geopandas: 0.3.1
dask: 2024.9.0
pandas: 2.2.2
OS: Ubuntu 22.04.4 LTS

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