Folium 中的 HeatMapWithTime 插件

Question

我能够创建一个热图，但没有显示点：

import folium
import folium.plugins as plugins
import numpy as np
import pandas as pd
import geopandas as gpd
from folium import Choropleth, Circle, Marker
from folium.plugins import HeatMap, MarkerCluster, HeatMapWithTime
ucdp_df = pd.read_csv('csv/ged201.csv') # from https://ucdp.uu.se/downloads/index.html#ged_global
ucdp = gpd.GeoDataFrame(ucdp_df, geometry=gpd.points_from_xy(ucdp_df.longitude, ucdp_df.latitude))
ucdp.crs = {'init': 'epsg:4326'}
m = folium.Map([35, 41], tiles='stamentoner', zoom_start=6)
hm = HeatMapWithTime(data=ucdp[['latitude', 'longitude']].values.tolist(),
                     index=ucdp['year'].values.tolist(), 
                     radius=10,
                     auto_play=True,
                     max_opacity=0.3)
hm.add_to(m)
m

Answer 1

您需要以正确的格式提供数据。这应该有效：

from collections import defaultdict, OrderedDict

data = defaultdict(list)
for r in ucdp_df.itertuples():
    data[r.year].append([r.latitude, r.longitude])
    
data = OrderedDict(sorted(data.items(), key=lambda t: t[0]))

然后使用数据：

m = folium.Map([35, 41],
               tiles='stamentoner',
               zoom_start=6)


hm = HeatMapWithTime(data=list(data.values()),
                     index=list(data.keys()), 
                     radius=10,
                     auto_play=True,
                     max_opacity=0.3)
hm.add_to(m)
m

你会得到：