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python用folium绘制地图并设置弹窗效果

时间:2021-12-29 00:11     来源/作者:KaZaKun

pythonCFolium

官方说明:folium.link.

  • map用于生成地图,主要用到黄色的参数

Map(location=None, width=‘100%', height=‘100%', left=‘0%', top=‘0%', position=‘relative', tiles=‘OpenStreetMap', attr=None, min_zoom=0, max_zoom=18, zoom_start=10, min_lat=- 90, max_lat=90, min_lon=- 180, max_lon=180, max_bounds=False, crs=‘EPSG3857', control_scale=False, prefer_canvas=False, no_touch=False, disable_3d=False, jpg_enabled=False, zoom_control=True, **kwargs)

Parameters 参数说明

  • location (tuple or list, default None) C Latitude and Longitude of Map (Northing, Easting).
  • width (pixel int or percentage string (default: ‘100%')) C Width of the map.
  • height (pixel int or percentage string (default: ‘100%')) C Height of the map.
  • tiles (str, default ‘OpenStreetMap') C Map tileset to use. Can choose from a list of built-in tiles, pass a custom URL or pass None to create a map without tiles. For more advanced tile layer options, use the TileLayer class.
  • min_zoom (int, default 0) C Minimum allowed zoom level for the tile layer that is created.
  • max_zoom (int, default 18) C Maximum allowed zoom level for the tile layer that is created.
  • zoom_start (int, default 10) C Initial zoom level for the map.
  • attr (string, default None) C Map tile attribution; only required if passing custom tile URL.
  • crs (str, default ‘EPSG3857') C Defines coordinate reference systems for projecting geographical points into pixel (screen) coordinates and back.定义坐标参考系统
  • control_scale (bool, default False) C Whether to add a control scale on the map.
  • prefer_canvas (bool, default False) C Forces Leaflet to use the Canvas back-end (if available) for vector layers instead of SVG.
  • no_touch (bool, default False) C Forces Leaflet to not use touch events even if it detects them.
  • disable_3d (bool, default False) C Forces Leaflet to not use hardware-accelerated CSS 3D transforms for positioning (which may cause glitches in some rare environments) even if they're supported.
  • zoom_control (bool, default True) C Display zoom controls on the map.

basic example

m = folium.Map(location=[45.523, -122.675], width=750, height=500)

m = folium.Map(location=[45.523, -122.675], tiles='cartodb positron')

m = folium.Map(

 location=[45.523, -122.675],

 zoom_start=2,

 tiles='https://api.mapbox.com/v4/mapbox.streets/{z}/{x}/{y}.jpg?access_token=mytoken',

 attr='Mapbox attribution'
...)

Markers

m = folium.Map(location=[45.372, -121.6972], zoom_start=12, tiles="Stamen Terrain")

tooltip = "Click me!"

folium.Marker(
  [45.3288, -121.6625], popup="<i>Mt. Hood Meadows</i>", tooltip=tooltip
).add_to(m)

tooltip:点击标记后弹出的信息
popup:鼠标放标记上显示的信息

python用folium绘制地图并设置弹窗效果

标记样式修改

m = folium.Map(location=[45.372, -121.6972], zoom_start=12, tiles="Stamen Terrain")

folium.Marker(
  location=[45.3288, -121.6625],
  popup="Mt. Hood Meadows",
  icon=folium.Icon(icon="cloud"),
).add_to(m)

folium.Marker(
  location=[45.3311, -121.7113],
  popup="Timberline Lodge",
  icon=folium.Icon(color="green"),
).add_to(m)

folium.Marker(
  location=[45.3300, -121.6823],
  popup="Some Other Location",
  icon=folium.Icon(color="red", icon="info-sign"),
).add_to(m)

python用folium绘制地图并设置弹窗效果

标记圆形区域

python用folium绘制地图并设置弹窗效果

点击任意位置出现经纬度folium.LatLngPopup()

m = folium.Map(location=[46.1991, -122.1889], tiles="Stamen Terrain", zoom_start=13)

m.add_child(folium.LatLngPopup())

python用folium绘制地图并设置弹窗效果

打点功能:点击任意位置出现标记,再点击弹出信息

m = folium.Map(location=[46.8527, -121.7649], tiles="Stamen Terrain", zoom_start=13)

folium.Marker([46.8354, -121.7325], popup="Camp Muir").add_to(m)

m.add_child(folium.ClickForMarker(popup="Waypoint"))

python用folium绘制地图并设置弹窗效果

允许显示任何HTML对象

m = folium.Map(location=[46.3014, -123.7390], zoom_start=7, tiles="Stamen Terrain")

folium.Marker(
  location=[47.3489, -124.708],
  popup=folium.Popup(max_width=450).add_child(
      folium.Vega(vis1, width=450, height=250)
  ),
).add_to(m)

python用folium绘制地图并设置弹窗效果

可以参考的代码
html参考链接

 

实战

用folium绘制中国的政策地图,城市的政策汇总在一个excel表中。要实现的效果是政策可视化,点击某一个城市,可以弹出这个城市所有的政策。

import folium
import webbrowser as wb
import numpy as np
import xlrd
import pandas as pd
from folium import CustomIcon

def get_data():
  '''
  return:
  df_data:返回城市对应的编号,经纬度
  df_policy:返回城市的政策名称、链接、编号
  '''
  file_name = 'policy.xls'
  all_data = xlrd.open_workbook(file_name)
  table = all_data.sheet_by_name('num_lat_lon')
  df_data = pd.DataFrame(columns=['city','number','latitude','longitude'])
  for i in range(1,table.nrows):
      df_data.loc[i] = table.row_values(i)

  table_policy = all_data.sheet_by_name('policy')
  df_policy = pd.DataFrame(columns=['number','name','link'])
  for i in range(1,table_policy.nrows):
      df_policy.loc[i,'number'] = table_policy.cell(i,3).value
      df_policy.loc[i,'name'] = table_policy.cell(i,1).value
      df_policy.loc[i,'link'] = table_policy.cell(i,2).value

  return df_data, df_policy

  # 中文转换
def parse_zhch(s):
      return str(str(s).encode('ascii' , 'xmlcharrefreplace'))[2:-1]

def show_map(df_data,df_policy):
  '''
  可以使用高德地图或默认地图
  m = folium.Map(zoom_start=4,zoom_control=True,tiles='http://webrd02.is.autonavi.com/appmaptile?lang=zh_cn&size=1&scale=1&style=7&x={x}&y={y}&z={z}',attr='default')
  '''
  # 默认地图
  m = folium.Map(location=[39.904,116.408],zoom_start=4,zoom_control=True,tiles='OpenStreetMap')
  for i in range(1,len(df_data)):
      # 得到该城市的编号、经纬度
      number = df_data.loc[i,'number']
      latitude = df_data.loc[i,'latitude']
      longitude = df_data.loc[i,'longitude']
      tip = df_data.loc[i,'city']

      # 获取城市编号对应的所有政策和链接的行索引
      city_index = df_policy[df_policy.number == number].index.tolist()
      # 将城市名称和链接放同一个list中
      s=[]
      for i in city_index:
          s.append(df_policy.loc[i,'name']) 
          s.append(df_policy.loc[i,'link'])
      # 计算最大长度
      length = []
      for i in range(len(s)):
          length.append(len(s[i]))
      WIDTH = max(length)
      # 点击弹出内容和弹出框大小设置
      ss=''
      for i in range(len(s)):
          ss = ss + s[i] + '</br>' 
      pop = folium.Popup(html=ss,max_width=WIDTH*10)
      icon = CustomIcon(icon_image ='loc.jpg',icon_size=(20, 20))
      # tooltip:悬浮弹出信息;popup:点击出现信息
      folium.Marker([latitude,longitude],icon=icon, popup=pop,tooltip=parse_zhch(tip)).add_to(m)

  m.save('map.html')
  wb.open('map.html')


if __name__ == '__main__':

  df_data,df_policy = get_data()
  show_map(df_data,df_policy)

实现效果:

python用folium绘制地图并设置弹窗效果

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原文链接:https://blog.csdn.net/weixin_43238031/article/details/119965981

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