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Add independent Flemish low-rise calibration candidates
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@@ -3779,6 +3779,35 @@ Validation:
- Add an auditable image/footprint alignment stage or select lower-parallax independent Flemish AOIs, then repeat visual QA before corpus composition.
## 2026-07-30 - V66 independent Flemish low-rise replacement audit
### What changed
- Added and provisioned three spatially independent Flemish low-rise calibration candidates: Zutendaal, Zoersel and Landen.
- Materialized immutable temporal corpus `building-be-v66-lowrise-temporal-r1` with manifest SHA-256 `d861da48aca40121e158e6ab243a6ccbe53e14d500a186af64b620f612935b07`.
- Applied the provider-native GRB main-building allowlist, retaining 73, 66 and 110 source instances respectively while preserving every excluded annex in label-audit evidence.
- Tested per-instance image-edge alignment, V31 detector-consensus translation, strict SAM refinement/drop and an independent YOLO-World roof vocabulary. Every generated contact sheet remained fail-closed rejected; none entered training.
### What was tested
- `python -m pytest tests/test_provision_belgium_building_training_portfolio.py -q` passed (`3 passed`).
- The server confirmed CUDA execution on the RTX 4080 SUPER.
- YOLO-World model SHA-256: `9b2c17ab6124a913e9b3a5c170617920d91b0f01111a8479da69f00e2cf27792`; it returned 65 low-confidence detections across 12 tiles and failed visual precision.
- The V31 consensus route accepted only Zoersel with nine agreeing pairs and failed the other two AOIs; visual review rejected the accepted shift as well.
### What remains open
- An independently reviewed image-visible Flemish roof-label set is still required before the national retraining loop can honestly resume.
- Protected test/background evaluation, promotion and production redeployment remain closed.
### Known limitations
- Orthophoto ground displacement means current GRB ground-footprint boxes are not detector-grade roof truth at IoU 0.5. Automatic proposal models tested here do not reach the required visual precision.
### Next recommended pass
- Obtain or annotate image-visible roof boxes independently of the release candidate, freeze their checksums and human acceptance evidence, then rebuild and retrain the national corpus.
## Post-V1 national coverage completion: Wallonia (2026-07-22)
- Located and live-validated the stable official WALOUS 2018 GeoTIFF