Can heatmaps maintain a fixed geographic radius regardless of the zoom level?

[dhyanKaro]

Rather than defining the radius by pixels.

[hansthen]

Folium is a simple wrapper around Leaflet and its plugins. As far as I can see, the underlying plugin https://github.com/Leaflet/Leaflet.heat/ does not support what you ask.

One possible workaround you could explore (and it requires a little javascript) is to add an event handler on the "zoomend" event. You could then recalculate radius in pixels based on extent of the map visible. It is tricky however. Geographical circles (on the globe) are not exactly circles on the map projection.