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

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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

Research direction
Investigate how Mapbox GL supports custom line styles (dash patterns) in layers, then explore how to expose that through Plotly's scattermapbox trace. Look at Mapbox GL documentation for line dasharray and see if it can be applied to the line layer used by scattermapbox.
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.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScriptMapbox GL basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50