observablehq / observablehq/plot
projection should support the angle option
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enhancement
- Dominant language
- HTML
- Stars
- 5.4k
- Forks
- 244
- PR merge metrics
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Description
https://d3js.org/d3-geo/projection#projection_angle
Plot.plot({
projection: {
type: ({ width, height }) =>
d3.geoEqualEarth().angle(11).fitSize([width, height], { type: "Sphere" })
},
marks: [Plot.graticule(), Plot.sphere()]
})
should be available as
Plot.plot({
projection: {
type: "equal-earth",
angle: 11
},
marks: [Plot.graticule(), Plot.sphere()]
})
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at the Plot.plot projection configuration and trace how the "equal-earth" type is created. Compare it with the d3.geoEqualEarth().angle(11) example in the issue, then verify that the declarative angle option produces the same rotated projection with the graticule and sphere marks.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- d3js, javascript
- Domain
- data-visualization
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 50/100