mapbox / mapbox/mapbox-gl-js

Better API for Gall-Peters and other cylindrical equal-area projections

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#11,513 3 comments 0 reactions 0 assignees View on GitHub

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api :memo: feature :green_apple:
Dominant language
TypeScript
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Description

Currently there are only 2 rectangular projections: Mercator and Equirectangular. Gall-Peters is pretty popular for showing countries at true scale.

I'm not particular knowledgeable on projections, but it was the one I expected to be able to use, and was a bit surprised to find it wasn't implemented.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the existing Mercator and Equirectangular projection APIs and how rectangular projections are exposed in mapbox-gl-js. Define the API scope for Gall-Peters and other cylindrical equal-area projections, then verify that the requested projections can be used to render maps at true scale.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
computer-graphics, frontend
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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