您好,我正在尝试在 jupyter 笔记本中使用 Folium 渲染这张 map 。
https://github.com/kthotav/TopoJSON-Maps/blob/master/usa/usa-states/colorado/colorado-counties.json
由于这是 TopoJson,所以它应该非常简单
m = folium.Map([39, -105], zoom_start=7)
folium.TopoJson(
open('./data/colorado-counties.json'),
object_path='objects.colorado-counties'
).add_to(m)
m
这会渲染基础图层,但不会绘制县的多边形。
我找到了this other example on stackoverflow并且使用基本相同的代码就可以很好地渲染。
m = folium.Map(location=[40.7,-74], zoom_start=10)
folium.TopoJson(
open('./data/nyc_census_tracts_2010.geojson'),
object_path='objects.nyct2010',
).add_to(m)
m
我找不到这两个文件之间的任何大范围差异。是否存在某些 topojson 版本不兼容的情况?
最佳答案
好的,明白了。 folium 无法解析其中包含 -
的对象名称。可能是 JavaScript 翻译的问题?
有趣的测试
作品
m = folium.Map([0, 0], zoom_start=7)
folium.TopoJson(
{
"type":"Topology",
"transform":{
"scale": [1,1],
"translate": [0,0]
},
"objects":{
"two_squares":{
"type": "GeometryCollection",
"geometries":[
{"type": "Polygon", "arcs":[[0,1]],"properties": {"name": "Left_Polygon" }},
{"type": "Polygon", "arcs":[[2,-1]],"properties": {"name": "Right_Polygon" }}
]
}
},
"arcs": [
[[1,2],[0,-2]],
[[1,0],[-1,0],[0,2],[1,0]],
[[1,2],[1,0],[0,-2],[-1,0]]
]
},
object_path='objects.two_squares'
).add_to(m)
m
不起作用
m = folium.Map([0, 0], zoom_start=7)
folium.TopoJson(
{
"type":"Topology",
"transform":{
"scale": [1,1],
"translate": [0,0]
},
"objects":{
"two-squares":{
"type": "GeometryCollection",
"geometries":[
{"type": "Polygon", "arcs":[[0,1]],"properties": {"name": "Left_Polygon" }},
{"type": "Polygon", "arcs":[[2,-1]],"properties": {"name": "Right_Polygon" }}
]
}
},
"arcs": [
[[1,2],[0,-2]],
[[1,0],[-1,0],[0,2],[1,0]],
[[1,2],[1,0],[0,-2],[-1,0]]
]
},
object_path='objects.two-squares'
).add_to(m)
m
关于Python Folium Topojson 文件未渲染,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49059042/