Support larger operator training samples

backend/tests/test_sprint127_operator_sample_quality_matrix.py

@@ -43,6 +43,9 @@ def test_prepare_operator_real_data_samples_help_does_not_require_gis_dependenci
     assert result.returncode == 0
     assert "Prepare real Digitaal Vlaanderen" in result.stdout
     assert "--samples" in result.stdout
+    assert "--width" in result.stdout
+    assert "--height" in result.stdout
+    assert "--half-size-scale" in result.stdout
 
 
 def test_multi_sample_detection_quality_matrix_runs_existing_matrix_for_each_sample() -> None:

backend/tests/test_sprint131_operator_sample_expansion.py

@@ -63,6 +63,27 @@ def test_operator_background_candidates_are_unique_enough_for_hard_negative_trai
     assert half_sizes == {260.0}
 
 
+def test_operator_sample_can_be_scaled_for_larger_training_aoi(tmp_path: Path) -> None:
+    module = load_sample_preparer()
+
+    sample = module.OperatorSample(
+        slug="geel",
+        display_name="Geel",
+        center_lon=5.0,
+        center_lat=51.0,
+        half_size_m=250.0,
+    )
+
+    configured = module.apply_sample_overrides(sample, width=1024, height=1024, half_size_scale=2.0)
+    ortho_path, reference_path = module.sample_artifact_paths(configured, tmp_path)
+
+    assert configured.width == 1024
+    assert configured.height == 1024
+    assert configured.half_size_m == 500.0
+    assert ortho_path.name == "geel_orthophoto_wms_1024.tif"
+    assert reference_path.name == "geel_grb_gbg_buildings.geojson"
+
+
 def test_background_candidate_can_write_empty_reference_geojson(tmp_path: Path, monkeypatch) -> None:
     module = load_sample_preparer()