地理 pandas 为情节上的点添加标签

问题描述

我有一个geodataframe'all_locations'，其中有一个几何列和一个带有点名称的列.在地图上绘制点可以很好地工作，但是我想用位置名称注释这些点.

I have a geodataframe 'all_locations' with a geometry column and a column with the name of the point. Plotting the points on a map works just fine but I want to annotate the points with location name.

['位置'] ['几何']
BUITHVN8 POINT()

['location'] ['geometry']
BUITHVN8 POINT()

(实际数据框当然要大得多)

(Actual dataframe is much larger of course)

我已经尝试过此操作(和其他操作):

I have tried this (and other things):

    all_locations['coords'] = all_locations['geometry'].apply(lambda x: x.point.coords[:])
all_locations['coords'] = [coords[0] for coords in all_locations['coords']]

all_locations.plot(ax=ax)
for idx, row in all_locations.iterrows():
    plt.annotate(s=row['locatie'], xy=row['geometry'])

添加坐标列，但会出现此错误:点"对象没有属性点"

Adding a coordinates column but it gives this error: ''Point' object has no attribute 'point'

推荐答案

使用Geopandas中包含的cities示例数据集，您可以按照以下步骤进行操作:

Using the cities example dataset included in geopandas, you can do this as follows:

import geopandas
cities = geopandas.read_file(geopandas.datasets.get_path('naturalearth_cities'))

ax = cities.plot()

for x, y, label in zip(cities.geometry.x, cities.geometry.y, cities.name):
    ax.annotate(label, xy=(x, y), xytext=(3, 3), textcoords="offset points")

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