DOC: detailing docstring and add lon & lat as args in points_from_xy()

I’m so glad to see the gpd.points_from_xy() function in 0.5.0 . The function needs two args:

geometry = gpd.points_from_xy(df.longitude, df.latitude)
gdf = gpd.GeoDataFrame(df, geometry=geometry)

This requires the users to know the order of longitude and latitude. I wonder if they could be optional args so that the users don’t have to remember the order so either geometry = gpd.points_from_xy(lon=df.longitude, lat=df.latitude) or geometry = gpd.points_from_xy(lat=df.latitude, lon=df.longitude) works.

[jorisvandenbossche]

Adding it to the docstring is certainly a good idea!

Giving an error message is not really possible I think, as it is difficult to detect (most often switching lon and lat gives some location on earth, just not the one you wanted).

[martinfleis]

On the other hand, some people use Geopandas to handle abstract datasets where latitude and longitude doesn’t really make sense while x and y works always. Even though you have to remember which is x and which y.