Interactive (Choropleth) map with pattern fills in Plotly — possible?

📊 Plotly Python
1

I’m currently building an interactive energy price derivative map for Europe, I’ve already implemented a Plotly Choropleth map with color-coding (continuous scale), interactive slider over time, hover information for each zone.

I’d like to add patterns (hatching, stripes, dots, etc.) on top of color shading — as a second information layer. Example use case: whenever price zones split apart, all countries with the same price at timestamp t share a specific pattern.

I know that plotly.express.choropleth and plotly.graph_objects.Choropleth use a 3D geographic projection, which prevents direct pattern filling. Is it possible to realize all desireable features?

2

Hello! Choropleth traces don’t currently support patterns. You might be able to approximate something similar using additional CSS, but it would be pretty brittle. Another user requested this feature (for the choropleth mapbox trace) here. You could add your use case there for future reference, but the future likely won’t be added any time soon.