Constrain visible roof grouping to compact clusters
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@@ -102,3 +102,10 @@ and visible-instance counts. This mode is not the default: the Belgium v8
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experiment showed that unconditional touching-footprint dissolve can merge
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whole urban blocks and therefore must pass the same independent gates before
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it can replace native instances.
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The compact-roof variant therefore merges a connected group only when it has
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at most 12 source footprints and fills at least 55% of its axis-aligned
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envelope. Larger or irregular connected groups retain their native instances
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and are marked `native_instance_complex_touch_group`. These fixed criteria
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prevent administrative row-house chains from becoming one ambiguous detector
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box while keeping the experiment deterministic and auditable.
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