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Record dated 75 AOI corpus iteration
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2026-07-27 02:51:10 +02:00
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## Current gap inventory
The v3 corpus closes basic composition and leakage gaps with 60 independent
AOIs and 10,262 accepted building labels. It adds coastal, ribbon-development,
farmland, park, forest and additional urban contexts. Its remaining known gaps
are:
The v4 dated corpus closes basic composition, leakage and temporal-identity
gaps with 75 independent AOIs and 13,765 accepted building labels. It adds
coastal, ribbon-development, farmland, park, forest and additional urban
contexts. Its remaining known gaps are:
- all rolling regional mosaics have an unknown exact per-pixel observation
date; this is recorded honestly and must be resolved through dated provider
products or change-aware label review, never inferred from download time;
- dated 2025 imagery is used for Flanders and Brussels and the dated 2024 SPW
campaign for Wallonia. Exact flight days remain a later metadata refinement,
but all corpus relations are now measured periods rather than download dates;
- GRB/PICC/UrbIS describe ground footprints, whereas visible roofs can remain
displaced. The existing detector QA contract therefore uses IoU 0.25; the
threshold is frozen and cannot be relaxed per candidate;