locationtech / locationtech/spatial4j

WKTReader returns Envelope instead of Polygon

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#166 8 comments 2 reactions 0 assignees View on GitHub

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enhancement
Dominant language
Java
Stars
961
Forks
172
PR merge metrics
No merged PRs in 30d

Description

When supplying a rectangle wktstring (POLYGON ((14 53, 13 53, 13 52, 14 52, 14 53))) to the WKTReader, the WKTReader returns an Envelope (ENVELOPE (13, 14, 53, 52)).

I find this non intuitive, as I would expect it to not change the "shape form". Is there a possibility to

  • prevent the WKTReader from "optimizing" the shape form?
  • or, to change the polygon shape "object" to an envelope shape "object" without readers/writers?

I guess this would also happen with other shapes, e.g., a circle, right?

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
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  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 reproducing the rectangle WKT case through WKTReader and inspect how the Polygon is represented as an Envelope. Review the existing discussion to determine whether the intended outcome is preserving the Polygon or adding a separate conversion path; completion should include an agreed behavior and tests for the reported case.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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