Plotly Scattermapbox，无法向标记添加文本

Question

我正在尝试将文本添加到下面的 plotly 地图中，原始代码修改自 https://plotly.com/python/lines-on-mapbox/

import plotly.graph_objects as go

fig = go.Figure(go.Scattermapbox(
    mode = "markers",

    marker = {'size': 10}))

fig.add_trace(go.Scattermapbox(
    mode = "markers",
    lon = longlist,
    lat = latlist,
    marker = {'size': 10}))



fig.update_layout(
    margin ={'l':0,'t':0,'b':0,'r':0},
    mapbox = {
        
        'style': "stamen-terrain",
        'center': {'lon': -20, 'lat': -20},
        'zoom': 1})

fig.show()

我试图复制Plotly Scattermapbox: Is there a way to include some text above and below the markers?提供的解决方案

在下面查看我编辑的代码，其中包括从幅度列表中检索数据的新文本代码和 mapbox_access_token 的新代码

import plotly.graph_objects as go

mapbox_access_token = 'mytoken'


fig = go.Figure(go.Scattermapbox(
    mode = "markers",

    marker = {'size': 10}))

data = fig.add_trace(go.Scattermapbox(
    mode = "markers",
    lon = longlist,
    lat = latlist,
    marker = {'size': 10},
    textposition='top right',
    textfont=dict(size=16, color='black'),
    text = magnitudelist
))


layout = dict(margin=dict(l=0, t=0, r=0, b=0, pad=0),
              mapbox=dict(accesstoken=mapbox_access_token,
                          center=dict(lat=-20, lon=-20),
                          style='stamen-terrain',
                          zoom=1))


fig = go.Figure(data=data, layout=layout)
fig.show()

结果空白

我正在尝试获得更像这样的结果

任何建议将不胜感激

Answer 1

我遇到了同样的问题，请尝试以下方法：

1. 在 Scattermapbox 模式中包含“文本”并指定要显示的字符串或字符串数​​组：

fig.add_trace(go.Scattermapbox(
      mode = "markers+text", # include text mode
      lon = longlist,
      lat = latlist,
      marker = {'size': 10},
      text = textlist)) # include text list

1. 尝试其他 mapbox 样式，例如“light”：

layout = dict(margin=dict(l=0, t=0, r=0, b=0, pad=0),
              mapbox=dict(accesstoken=mapbox_access_token,
                          center=dict(lat=-20, lon=-20),
                          style='light', # change mapbox style
                          zoom=1))

Answer 2

这是一个在卫星地图上的标记内绘制文本的工作示例

import plotly.graph_objects as go

# create our figure blank which we will build onto. the biggest thing i saw
# was that you have to specify the mode that will show markers as well as text

fig = go.Figure(
      go.Scattermapbox(
      mode = "lines+markers+text",
    )
)


# Make sure to use your access token and draw the polygon/lines/features you want

fig.update_layout(
    mapbox = {
        'style': "satellite",
        'accesstoken': "pk.your_access_token",
        'center': { 'lon': -73.605, 'lat': 45.51},
        'zoom': 15,       
        'layers': [{
            'source': {
                'type': "FeatureCollection",
                'features': [
                    {
                    
                        'type': "Feature",
                        'geometry': {
                        'type': "MultiPolygon",
                        'coordinates': [[[
                            [-73.606352888, 45.507489991], [-73.606133883, 45.50687600],
                            [-73.605905904, 45.506773980], [-73.603533905, 45.505698946],
                            [-73.602475870, 45.506856969], [-73.600031904, 45.505696003],
                            [-73.599379992, 45.505389066], [-73.599119902, 45.505632008],
                            [-73.598896977, 45.505514039], [-73.598783894, 45.505617001],
                            [-73.591308727, 45.516246185], [-73.591380782, 45.516280145],
                            [-73.596778656, 45.518690062], [-73.602796770, 45.521348046],
                            [-73.612239983, 45.525564037], [-73.612422919, 45.525642061],
                            [-73.617229085, 45.527751983], [-73.617279234, 45.527774160],
                            [-73.617304713, 45.527741334], [-73.617492052, 45.527498362],
                            [-73.617533258, 45.527512253], [-73.618074188, 45.526759105],
                            [-73.618271651, 45.526500673], [-73.618446320, 45.526287943],
                            [-73.618968507, 45.525698560], [-73.619388002, 45.525216750],
                            [-73.619532966, 45.525064183], [-73.619686662, 45.524889290],
                            [-73.619787038, 45.524770086], [-73.619925742, 45.524584939],
                            [-73.619954486, 45.524557690], [-73.620122362, 45.524377961],
                            [-73.620201713, 45.524298907], [-73.620775593, 45.523650879]
                        ]]]
                    }
                }]
            },
            'type': "line", 'below': "traces", 'color': "red"}]},
    margin = {'l':0, 'r':0, 'b':0, 't':0}
)


# finally add a trace of the markers you want as a list

fig.add_trace( go.Scattermapbox(
    lat=[45.51, 45.50687600],
    lon=[-73.605, -73.606133883,],
    marker={
        "color": "cyan",
        "size": 30,

    },
    mode="markers+text",
    text=["21:09", "06:11", ],
    textfont = {'family': "Times", 'size': 12, 'color': "MediumPurple"},
    
    textposition="middle center"
))

最终结果如下所示：