不确定如何将颜色图与 Folium 标记图一起使用 [英] Unsure how to use colormap with Folium marker plot

问题描述

我有一个包含纬度、经度和功率百分比的数据框.我想做一些非常简单但不确定如何做的事情:应用颜色图根据数据点的百分比为数据点着色.所以 90% 是红色，100% 是蓝色.我已经创建了成功的地图和颜色图，但不确定下一步如何进行.

I have a dataframe with latitude, longitude, and power percentage. I want to do something very simple but not sure how: apply a colormap to color the data points based on their percentage. So 90% is red and 100% is blue. I have created both a successful map and colormap, but not sure how to proceed next.

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','power'])

x_start = (df['latitude'].max() + df['latitude'].min()) / 2
y_start = (df['longitude'].max() + df['longitude'].min()) / 2
start_coord = (x_start, y_start)

map = folium.Map(location=start_coord, zoom_start=12)

lat = list(df.latitude)
lon = list(df.longitude)

for loc in zip(lat, lon):
    folium.Circle(
        location=loc,
        radius=10,
        #fill=True,
        #color='blue',
        #fill_opacity=0.7
    ).add_to(map)

display(map)

colormap = cm.LinearColormap(colors=['red','lightblue'], index=[90,100],vmin=90,vmax=100)
colormap

推荐答案

我很着急，但我过去就是这样做的.创建 CM，然后像这样调用它 colormap(.9)

I'm in a rush, but this is how I've done it in the past. Create the CM and then call it like so colormap(.9)

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','power'])

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=[90,100],vmin=90,vmax=100)

map = folium.Map(location=start_coord, zoom_start=12)


lat = list(df.latitude)
lon = list(df.longitude)
pow = list(df.power)


for loc, p in zip(zip(lat, lon), pow):
    folium.Circle(
        location=loc,
        radius=10,
        fill=True,
        color=colormap(p),
        #fill_opacity=0.7
    ).add_to(map)

map.add_child(colormap)

display(map)

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