cog ex

app.py

@@ -23,7 +23,7 @@ con = ibis.duckdb.connect()
 
 
 # fixme could create drop-down selection of the 300 cities
-city_name = st.text_input("Select a city", "New Haven")
+city_name = st.text_input("Select a city", "Oakland")
 
 # Extract the specified city 
 city = (con
@@ -34,6 +34,9 @@ city = (con
 
 # Render the map
 m = leafmap.Map(style="positron")
+if city_name == "Oakland":
+    m.add_cog_layer("https://espm-157-f24.github.io/spatial-carl-amanda-tyler/ndvi.tif", name="ndvi", palette = "greens")
 m.add_gdf(city, "fill", paint = {"fill-color": ["get", "fill"], "fill-opacity": 0.8})
+m.add_layer_control()
 m.to_streamlit()