在Plotly中创建Scattergeo图中的图例

import plotly.graph_objects as go

# 创建地理数据
geo_data = go.Scattergeo(
    locationmode = 'ISO-3',
    lon = [10, 20, 30],
    lat = [10, 20, 30],
    mode = 'markers',
    marker = dict(
        size = 10,
        color = 'rgb(255, 0, 0)',
        symbol = 'circle'
    )
)

# 创建散点数据
scatter_data = go.Scattergeo(
    locationmode = 'ISO-3',
    lon = [15, 25, 35],
    lat = [15, 25, 35],
    mode = 'markers',
    marker = dict(
        size = 10,
        color = 'rgb(0, 0, 255)',
        symbol = 'square'
    )
)

# 创建图例
legend = go.layout.Legend(
    x = 0,
    y = 1,
    traceorder = 'normal',
    font = dict(
        family = 'sans-serif',
        size = 12,
        color = 'black'
    ),
    bgcolor = 'rgba(0,0,0,0)',
    bordercolor = 'rgba(0,0,0,0)'
)

# 创建布局
layout = go.Layout(
    title = 'Scattergeo图',
    showlegend = True,
    legend = legend
)

# 创建图表
fig = go.Figure(data=[geo_data, scatter_data], layout=layout)

# 显示图表
fig.show()