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
@@ -132,3 +132,50 @@ def test_normalizer_rejects_features_created_after_dated_imagery(tmp_path: Path)
    )
    assert len(normalized["features"]) == 1
    assert audit["decision_counts"] == {"accepted": 1, "created_after_imagery_period": 1}
+
+
+def test_normalizer_merges_only_touching_visible_roof_instances(tmp_path: Path) -> None:
+    raster_path = tmp_path / "image.tif"
+    with rasterio.open(
+        raster_path,
+        "w",
+        driver="GTiff",
+        width=100,
+        height=100,
+        count=3,
+        dtype="uint8",
+        crs="EPSG:4326",
+        transform=from_origin(4.0, 51.0, 0.001, 0.001),
+    ) as dataset:
+        dataset.write(np.zeros((3, 100, 100), dtype="uint8"))
+    polygons = [
+        [[[4.01, 50.99], [4.02, 50.99], [4.02, 50.98], [4.01, 50.98], [4.01, 50.99]]],
+        [[[4.02, 50.99], [4.03, 50.99], [4.03, 50.98], [4.02, 50.98], [4.02, 50.99]]],
+        [[[4.04, 50.99], [4.05, 50.99], [4.05, 50.98], [4.04, 50.98], [4.04, 50.99]]],
+    ]
+    reference_path = tmp_path / "reference.geojson"
+    reference_path.write_text(
+        json.dumps(
+            {
+                "type": "FeatureCollection",
+                "features": [
+                    {"type": "Feature", "id": str(index), "properties": {}, "geometry": {"type": "Polygon", "coordinates": coordinates}}
+                    for index, coordinates in enumerate(polygons)
+                ],
+            }
+        ),
+        encoding="utf-8",
+    )
+    normalized, audit = module.normalize(
+        reference_path=reference_path,
+        raster_path=raster_path,
+        source_name="urbis",
+        min_label_px=3,
+        imagery_observed_at=None,
+        reference_observed_at=None,
+        merge_touching_roofs=True,
+    )
+    assert len(normalized["features"]) == 2
+    assert sorted(item["properties"]["source_feature_count"] for item in normalized["features"]) == [1, 2]
+    assert audit["accepted_source_feature_count"] == 3
+    assert audit["accepted_feature_count"] == 2