import folium
import pandas as pd
import folium.plugins
import branca
import branca.colormap as cm
data = [
[33.823400, -118.12194, 99.23],
[33.823500, -118.12294, 95.23],
[33.823600, -118.12394, 91.23],
[33.823700, -118.12494, 90.00]
]
df = pd.DataFrame(data, columns=['latitude','longitude','data'])
x_start = (df['latitude'].max() + df['latitude'].min()) / 2
y_start = (df['longitude'].max() + df['longitude'].min()) / 2
start_coord = (x_start, y_start)
colormap = cm.LinearColormap(colors=['red','lightblue'],
index=[df['data'].min(),df['data'].max()],
vmin=df['data'].min(),vmax=df['data'].max())
colormap.caption = 'Data [units]'
map = folium.Map(location=start_coord, zoom_start=12)
lat = list(df.latitude)
lon = list(df.longitude)
dat = list(df.data)
for loc, p in zip(zip(lat, lon), dat):
folium.Circle(
location=loc,
radius=10,
fill=True,
color=colormap(p),
fill_opacity=0.7
).add_to(map)
map.add_child(colormap)
map.save('index.html')
Problem description
Code above creates colored points, and displays a colormap to show what data value each color corresponds to. This is great but it would be even better if a background colour could be selected. This slightly hacky work-around does exactly what I want:
https://stackoverflow.com/a/50427006/4988601
I'd be happy to try and plumb this into folium itself if a few people show some interest in this feature (I'm fairly new to folium so any pointers on what methods/classes I'd need to poke around in would be appreciated).
Expected Output
Colormap with an optional background color rectangle to help it stand out.
Code Sample
Problem description
Code above creates colored points, and displays a colormap to show what data value each color corresponds to. This is great but it would be even better if a background colour could be selected. This slightly hacky work-around does exactly what I want: https://stackoverflow.com/a/50427006/4988601
I'd be happy to try and plumb this into folium itself if a few people show some interest in this feature (I'm fairly new to folium so any pointers on what methods/classes I'd need to poke around in would be appreciated).
Expected Output
Colormap with an optional background color rectangle to help it stand out.
Output of
folium.__version__
0.10.0