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Scattermapbox maki symbols plot on map, but not legend #2965
Description
Hi Plotly,
First, thank you for all the fantastic work you do.
I am a big fan of / heavy user of the plotly.go objects that render maps (Scattermapbox / Choroplethmapbox).
I have noticed, however, that when setting the symbol type to a maki symbol, it will render it on the map - but not the legend. This feels like a bug, as there is also a colour associated with the legend item that is not matched anywhere on the plot / by the symbol (except in hovertext).
Reproducible example below:
import os
import plotly.graph_objects as go
mapboxt = os.getenv('MAPBOX_TOKEN') # a mapbox token
lats = [52.370216, 53.2191696, 50.851368, 51.8125626]
lons = [4.895168, 6.5666699, 5.690973, 5.8372264 ]
fig = go.Figure()
scatt = go.Scattermapbox(
lat=lats,
lon=lons,
mode='markers',
hovertext=['Amsterdam', 'Groningen', 'Maastricht', 'Nijmegen'],
hoverinfo='text',
below='',
marker=dict(symbol ='hospital'),
name ='my_fake_hospitals',
showlegend=True)
fig.add_trace(scatt)
fig.update_layout(go.Layout(title_text ='Is it a hospital? No, it is a blue dot!',
title_x=0.5,
width=750,
height=700,
mapbox = dict(center= dict(lat=52.370216, lon=4.895168),
accesstoken= mapboxt,
zoom=5,
style="light"
)))
figFinally, as a side note, some maki symbols plot whilst others do not. I have determined through trial and error that this is down to whether or not the MapBox style includes these specific symbol types. Using custom Mapbox styles, therefore, may silently break the maki functionality as well.
Thanks you for your attention.
Activity
FlorianJacta commentedon Jul 29, 2024
What worked for you?
[-]Bug report: Scattermapbox: maki symbols plot on map, but not legend[/-][+]Scattermapbox maki symbols plot on map, but not legend[/+]emilykl commentedon Aug 31, 2026
Hi @Charlesfox1, I apologize that this issue never got a response!
I just wanted to note that this has been fixed in plotly.py v7.0.0, sort of.
In plotly/plotly.js#7825 we resolved a bug which prevented Maki icons from being colored. Now, they have a color which matches the dot in the legend. This looks best if you set
marker.sizeto a larger value such as 14, resulting in a plot that looks something like this:We still don't use icons in the legend, though; I did look into it but it's a bit complex since the Maki icons are loaded on-demand. It could be implemented in the future though.