下午好,
我正在尝试使用geopandas,pandas和folium的组合来创建一个我可以嵌入到网页中的多边形地图。
出于某种原因,它没有显示并且想知道是否有人可以提供帮助。
我采取的步骤:
1)从英国的议会边界操作系统中获取.shp。
2)然后我使用geopandas将投影更改为epsg = 4326,然后导出为GeoJSON,采用以下格式:
{ "type": "Feature", "properties": { "PCON13CD": "E14000532", "PCON13CDO": "A03", "PCON13NM": "Altrincham and Sale West" }, "geometry": { "type": "Polygon", "coordinates": [ [ [ -2.313999519326579, 53.357408280545918 ], [ -2.313941776174758, 53.358341455420039 ], [ -2.31519699483377, 53.359035664493433 ], [ -2.317953152796459, 53.359102954309151 ], [ -2.319855973429864, 53.358581917200119 ],... ] ] ] } },...
那么我想做的是将其与以下格式的选区数据框进行网格划分,dty:
constituency count
0 Burton 667
1 Cannock Chase 595
2 Cheltenham 22
3 Cheshire East 2
4 Congleton 1
5 Derbyshire Dales 1
6 East Staffordshire 4
import folium
mapf = folium.Map(width=700, height=370, tiles = "Stamen Toner", zoom_start=8, location= ["53.0219392","-2.1597434"])
mapf.geo_json(geo_path="geo_json_shape2.json",
data_out="data.json",
data=dty,
columns=["constituency","count"],
key_on="feature.properties.PCON13NM.geometry.type.Polygon",
fill_color='PuRd',
fill_opacity=0.7,
line_opacity=0.2,
reset="True")
mapf的输出如下:
mapf.json_data
{'../../Crime_data/staffs_data92.json': [{'Burton': 667,
'Cannock Chase': 595,
'Cheltenham': 22,
'Cheshire East': 2,
'Congleton': 1,
'Derbyshire Dales': 1,
'East Staffordshire': 4,
'Lichfield': 438,
'Newcastle-under-Lyme': 543,
'North Warwickshire': 1,
'Shropshire': 17,
'South Staffordshire': 358,
'Stafford': 623,
'Staffordshire Moorlands': 359,
'Stoke-on-Trent Central': 1053,
'Stoke-on-Trent North': 921,
'Stoke-on-Trent South': 766,
'Stone': 270,
'Tamworth': 600,
'Walsall': 1}]}
虽然mapf.create_map()函数成功创建了一个地图,但多边形不会渲染。
有人可以建议任何调试步骤吗?
如果有人需要,我永远不知道如何添加完整的数据文件,所以请告诉我。
感谢您提前抽出时间。
答案 0 :(得分:1)
@ elksie5000,试试mplleaflet非常简单。
pip install mplleaflet
在Jupyter / Ipython笔记本中:
import mplleaflet
ax = geopandas_df.plot(column='variable_to_plot', scheme='QUANTILES', k=9, colormap='YlOrRd')
mplleaflet.show(fig=ax.figure)