plotly/plotly.js

[Feature Request] Support line styles in Scattermapbox

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#6,791 opened on Nov 22, 2023

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P3featuregood first issue

Description

It would be nice to plot lines of different styles, e.g. dashed, dotted, etc. to a Scattermapbox layer. The lack for this feature has been noted here How do I change the line style to dash in a scattermapbox plot?, and here How to change line shape in mapbox maps?

Currently (Plotly 5.18), the only supported line attributes are "color" and "width" . However, distinguishing lines by color is not sufficient for monochrome styled figures. In addition, certain line styles are frequently expected:

  • minor roads = dashed line
  • under construction = dotted line

Contributor guide

Tech stack
javascript
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic JavaScriptplotly.js scattermapboxMapbox line styles
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45
Research direction
Review the scattermapbox line implementation in plotly.js source (likely in src/traces/scattermapbox/). Check how line dash is handled in other traces like scattergl. Look at Mapbox gl documentation for line dash support. No linked PRs, but there are community requests. Consider adding a 'dash' attribute to line object.
[Feature Request] Support line styles in Scattermapbox · plotly/plotly.js#6791 | Good First Issue