locationtech / locationtech/proj4j

Support for projjson format?

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feature
Dominant language
Java
Stars
232
Forks
86
PR merge metrics
No merged PRs in 30d

Description

Projjson format has been adopted into Parquet and Iceberg standard. Is there a way to support it via proj4j? I think this is the command used in pyproj for it: https://pyproj4.github.io/pyproj/stable/api/crs/coordinate_system.html#pyproj.crs.CoordinateSystem.to_json

Contributor guide

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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 proj4j's existing CRS input and output APIs, then compare their capabilities with the referenced pyproj CoordinateSystem.to_json behavior. Done means defining and implementing projjson support in proj4j with coverage for the supported format's expected cases.

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Assessment

Tech stack
java
Domain
backend
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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