[jkrenge]

Superseded by consolidated postal geocoding PR #124. This PR's head commit is retained in the combined branch. Combined CI passes on Node.js 24/26 and static checks.

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Summary

Return-location analysis needs approximate postcode points. AUS previously returned undefined for every coordinate lookup. This adds 3,044 distinct full-postcode points, with leading zeros retained.

coordinates(AUS, postcode)
  trim surrounding whitespace and require four digits
  look up one representative point
  return [longitude, latitude] strings, or undefined

Source: GeoNames AU.zip, retrieved/exported 2026-11-04, CC BY 4.0. Input: 18,566 locality rows / 3,170 codes. Retain 16,443 rows at accuracy 4 or 6, then average distinct coordinate pairs per postcode without duplicate-row weighting. Output: 3,044 records / unique postcodes. Source, hash, regeneration, attribution, primary-source sample checks, and limits are in docs/geocode-AUS.md.

This is incomplete coverage. Estimated rows (levels 1–3) are excluded, including mainland points incorrectly assigned to Norfolk, Christmas, and Cocos Islands. Rural points can be far from towns: the Birdsville sample is about 53 km from the Queensland Government town-area reference. Means are not official postal centroids or physical scan locations; no distance or fraud product is added.

Evidence

• Before: AUS is absent from the geocode allowlist and has no dataset.
  After: actual lookup tests pass for Darwin 0800, Sydney 2000, Birdsville 4482, and Lord Howe 2898, with all 3,044 records checked through the runtime lookup.
• 99 tests pass. npm run lint, npm run format:check, and npm run validate:data pass; validation retains two existing AUT/BEL warnings.
• Generator tests cover duplicate/order invariance, estimated-row exclusion, invalid data, coordinate ranges, postcode uniqueness, accepted surrounding spaces, and unknown/malformed/omitted codes. Regeneration matches committed data byte for byte.

Merge Danger

Door: two-way

Blast Radius: AUS

Only AUS data, generation, documentation, tests, and required runtime wiring change. Existing countries, exports, and coordinate string behavior stay unchanged. lib/geocode.js overlaps other country work; preserve all country entries when resolving conflicts. No merge, deployment, or publish is requested. Coverage is partial and rural accuracy has no guaranteed error bound.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-04T22:04:12.288293Z	35b9658	PR opened

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