CODEWITHSUNDEEP
geopandasannotategeoplot
Elias_sweden
Elias_sweden

Reputation: 35

Annotate a geoplot when using a projection

I got a dataframe with the following columns Name (string), size (num), latitude (num), longitude (num), geometry (shapely.geometry.point.Point).

When i'm plotting my points on a map and are trying to annotate each point the annotation is not shown at all. My guess is that this is due to the projection im using.

Here are the lines of codes im running:

import geopandas as gpd
import geoplot as gplt

proj = gplt.crs.AlbersEqualArea()
fig, ax = plt.subplots(figsize=(10, 10), subplot_kw={'projection': proj})

gdf = gpd.GeoDataFrame(df, geometry=gpd.points_from_xy(df.longitude, df.latitude))
gplt.pointplot(gdf, hue='size', s=15, ax=ax, cmap=palette, legend=True, zorder=10)
for idx, row in gdf.iterrows():
    plt.annotate(s=row['Name'], xy=[row['latitude'],row['longitude']])
plt.show()

Upvotes: 2

Views: 563

Answers (1)

swatchai
swatchai

Reputation: 18812

You need coordinate transformation in

plt.annotate(s=row['Name'], xy=[row['latitude'],row['longitude']])

The transformation should be

xtran = gplt.crs.ccrs.AlbersEqualArea()

Replace that line with

x, y = xtran.transform_point(row['longitude'], row['latitude'], ccrs.PlateCarree())
plt.annotate( s=row['Name'], xy=[x, y] )

Upvotes: 1

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