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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 。

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)

标记圆形区域

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())

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"))

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)

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 foliumimport webbrowser as wbimport numpy as npimport xlrdimport pandas as pdfrom folium import CustomIcondef 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:

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

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