Normalize touching footprints as visible roof instances

2026-07-27 05:06:20 +02:00
parent 7744803461
commit de0406130c
5 changed files with 112 additions and 4 deletions
@@ -94,3 +94,11 @@ end of the imagery period. A feature created afterward is retained in the
 audit but excluded from training as `created_after_imagery_period`. UrbIS does
 not expose an equivalent feature creation field in this acquisition contract,
 so its remaining temporal relation stays an explicit sample-level limitation.
+
+The detector target is an imagery-visible roof instance, not an administrative
+address or cadastral unit. Source footprints that truly touch or overlap are
+dissolved into one roof instance before tiling; separated footprints are never
+bridged. The audit retains every contributing native feature identifier and
+reports both the accepted source-feature count and resulting visible-instance
+count. This prevents dense row-house subdivisions that cannot be distinguished
+from the orthophoto from becoming contradictory image labels.