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Preserve exact native grids when combining soil auxiliaries - #7

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yuyi13 merged 1 commit into
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codex/exact-auxiliary-grid-20261017
Oct 17, 2026
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yuyi13 merged 1 commit into
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codex/exact-auxiliary-grid-20261017

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@yuyi13

@yuyi13 yuyi13 commented Oct 17, 2026

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Native coarse verification stopped when soil auxiliaries had exactly matching coordinates but affine spacing reconstructed from those coordinates differed by ~3e-15 degrees. Preserve the template affine in new soil preparations, and copy existing auxiliaries onto the output grid only after exact centre/CRS checks and a coordinate-roundoff bound. Record both transforms and any metadata adjustment, without resampling values.

Final product grid checks remain exact and now inspect the declared affine so an inconsistent stored origin cannot be hidden by coordinate inference. Every copied auxiliary receives the output grid mapping.

Validation: Gadi PBS 181483937 passed 398 tests, the offline paired workflow, source/wheel builds and the installed-wheel demo. A real 10,588-day Yanco coarse export preserved all scenario and auxiliary values exactly, passed numerical/grid checks, and reproduced 174,912 fitted cell–day pairs with RMSE difference 2.17e-11. No optimizer, forcing or parameter changes. Tested/published tree: 731a5a3899fb3ee97fb1b6fb598d20eb4d6368cb.

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chatgpt-codex-connector Bot commented Oct 17, 2026 •

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📝 Code Review ✅ Completed 2026-10-17T19:01:49.184790Z 020a2e0 PR opened
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@yuyi13
yuyi13 merged commit 2978659 into main Oct 17, 2026
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