Exactly. Right now we can use layers, but this just permit using one categorical variable:
1)https://stackoverflow.com/questions/54192523/can-i-create-a-drop-down-list-on-the-folium-map-in-python/54237159
2)https://nbviewer.jupyter.org/github/python-visualization/folium/blob/master/examples/FeatureGroup.ipynb
I have been using FeatureGroupSubGroup(), which permits adding another variable, but the layers don’t cross between variables. I explain everything in this link:
3)https://github.com/python-visualization/folium/issues/1331
It will be great if we could invite Frank Conengmo to this thread, one of the most active developers of Folium at this moment: 4)https://github.com/Conengmo
Being able of making queries to the map, with dropdown buttons or similar, to different categorical variables, would be so awesome.