Brainstorming - leafmaps without re-rendering on recalculation

[TomJohn]

Summary

Hello, streamlit community! I’m trying to figure out how to make my app’s user experience better. Any ideas how to define a leafmap with an added shape file, using a geodataframe, in a way that does not require map rendering on recalculation? I’ve tried using session states, but without satisfying results. Please note that I want to color certain counties taking into account parameters from text input, triggering recalculation.

Btw. is

    m = leafmap.Map()
    m.add_gdf(gdf, layer_name="JPT_NAZWA_")

    (...)

    m.add_gdf(
        gdf.loc[[st.session_state["r_no_col"]]],
        layer_name="Selected",
        fill_colors=["red"],
    )
    m.to_streamlit()

Streamlit app

Please note that it takes some time to load & render map

https://powiaty.streamlit.app/

Github

TomJohnH/streamlit-powiaty/blob/main/streamlit_app.py

[mathcatsand]

Did you see this post? Maybe it will help?

Streamlit Folium Update -- more dynamic maps

Streamlit-folium 0.8.0 was just released, and it contains new functionality for dynamic maps. [ezgif-1-0189d7f263] If you’re only making static maps (not adding/removing/updating things within your app), then you may not make use of this. But, if you’re changing your map (e.g. changing the markers that are on the map, moving to a new location, etc.) via other streamlit widgets, you can now do that without re-drawing the map every time. The new arguments to st_folium are zoom (takes an int), c…