Show temperature in map

[Carlos_Rocha]

Hi, i have a csv data with many year information about temperature is posible show in map with color and cover this map i have a 2 column with lat and long with other 12 column with represent month of year.
can someone tell me what to read to do this or is possible?

thank

[randyzwitch]

Hi @Carlos_Rocha, welcome to the Streamlit community!

We have a convenience function st.map() that sounds like what you are trying to do:

https://docs.streamlit.io/en/stable/api.html?highlight=pydeck#streamlit.map

If you need more control over the map, st.map is stpydeck_chart under-the-hood, so you can customize whatever you’d like based on the pydeck Python library

https://docs.streamlit.io/en/stable/api.html?highlight=pydeck#streamlit.pydeck_chart

Best,
Randy

[Carlos_Rocha]

Hi @randyzwitch yes st.map() i used but i have a more question
my csv have column lat,lon temperature, i would like put in the map temperature
i have this code

DATA_URL = ('../path/file.csv')

@st.cache
def load_data(nrows):
    data = pd.read_csv(DATA_URL, nrows=nrows)
    lowercase = lambda x: str(x).lower()
    return data
data = load_data(10000)
df = pd.DataFrame({'lat': data['lat'], 'lon': data['lon']})
st.map(df) 

this code put the point in the map for latitud and longitud not the temperature
how to put the temperature??

[randyzwitch]

Right, st.map() is for quick geospatial scatterplots. Since you need more control, you’ll need to use st.pydeck_chart

https://docs.streamlit.io/en/stable/api.html?highlight=pydeck#streamlit.pydeck_chart

From the pydeck documentation (I haven’t tried it though), it appears that you can use an expression parser to pass values to vary the colormap of a scatterplot:

https://deckgl.readthedocs.io/en/stable/layer.html#expression-parsers-in-pydeck-objects