Has anyone tried to use MapScaler together wit Altair?

[knutwannheden]

An example for how to use MapScaler (https://pypi.org/project/mapscaler/) together with Altair's mark_geoshape() would be most appreciated!

[mattijn]

Mapscaler just updates your geometry. So this should work:

import mapscaler as ms

# mapscaler stuff
loader = ms.MapLoader()
df = loader.fetch_counties()['df']
ss = ms.ShapeScaler()
scaled_df = ss.scale_map(df, 'EST_POP_2019', map_vel=.001, group_vel=.15, verbose=True)

import altair as alt
alt.Chart(scaled_df).mark_geoshape().project('albersUsa')

But for me the mapscaler function runs more than 30 minutes. So the problem is not so much altair in this.

[knutwannheden]

Thanks for the example! The runtime overhead is a bummer. I will give it a try.