Plot cotour graph on folium map

Question

I've drawn a contour plot using matplolib and i want to overly this plot over folium map or is there any way to draw contour plot on map using folium

This is my code

    import json
    
    import numpy as np
    from scipy.interpolate import griddata
    from matplotlib import pyplot as plt
    
    f = open('data.json', 'r')
    
    data = json.load(f)
    
    temp = data['temp']
    lon = data['lon']
    lat = data['lat']
    
    x = np.linspace(min(lon), max(lon), 100)
    y = np.linspace(min(lat), max(lat), 100)
    
    X,Y = np.meshgrid(x, y)
    Z = griddata((lon, lat), temp, (X, Y), method='cubic')
    
    plt.contour(X,Y, Z)
    plt.show()

My data file data.json, below is how my plot looks now i want to plot this over map

Answer 1

• it's not clear your geometry is correct, have reversed lat & lon
• straight forward with https://pypi.org/project/geojsoncontour/

import json
import numpy as np
from scipy.interpolate import griddata
from matplotlib import pyplot as plt
import geojsoncontour
import geopandas as gpd

f = open('data.json', 'r')

data = json.load(f)

temp = data['temp']
lon = data['lon']
lat = data['lat']

y = np.linspace(min(lon), max(lon), 100)
x = np.linspace(min(lat), max(lat), 100)

X,Y = np.meshgrid(x, y)
Z = griddata((lat, lon), temp, (X, Y), method='cubic')
    
contour =    plt.contour(X,Y, Z)

gdf = gpd.GeoDataFrame.from_features(json.loads(geojsoncontour.contour_to_geojson(
    contour=contour,
    min_angle_deg=3.0,
    ndigits=5,
    stroke_width=1))).set_crs("EPSG:4326")

m = gdf.explore(color=gdf["stroke"])

plt.show()
m