Issue #690/#712 best effort resample_spatial on cube without metadata

openeo/metadata.py

@@ -422,7 +422,7 @@ def drop_dimension(self, name: str = None) -> CubeMetadata:
 
     def resample_spatial(
         self,
-        resolution: Union[int, float, Tuple[float, float], Tuple[int, int]] = 0.0,
+        resolution: Union[float, Tuple[float, float], List[float]] = 0.0,
         projection: Union[int, str, None] = None,
     ) -> CubeMetadata:
         resolution = normalize_resample_resolution(resolution)

openeo/rest/datacube.py

@@ -40,6 +40,7 @@
     Band,
     BandDimension,
     CollectionMetadata,
+    CubeMetadata,
     SpatialDimension,
     TemporalDimension,
     metadata_from_stac,
@@ -69,6 +70,10 @@
     from openeo.udf import XarrayDataCube
 
 
+# Sentinel value for arguments that are unset (when `None` has a different meaning)
+_UNSET = object()
+
+
 log = logging.getLogger(__name__)
 
 
@@ -97,7 +102,7 @@ def process(
         self,
         process_id: str,
         arguments: Optional[dict] = None,
-        metadata: Optional[CollectionMetadata] = None,
+        metadata: Optional[CubeMetadata] = _UNSET,
         namespace: Optional[str] = None,
         **kwargs,
     ) -> DataCube:
@@ -111,7 +116,11 @@ def process(
         :return: new DataCube instance
         """
         pg = self._build_pgnode(process_id=process_id, arguments=arguments, namespace=namespace, **kwargs)
-        return DataCube(graph=pg, connection=self._connection, metadata=metadata or self.metadata)
+        return DataCube(
+            graph=pg,
+            connection=self._connection,
+            metadata=self.metadata if metadata is _UNSET else metadata,
+        )
 
     graph_add_node = legacy_alias(process, "graph_add_node", since="0.1.1")
 
@@ -750,14 +759,12 @@ def band(self, band: Union[str, int]) -> DataCube:
     @openeo_process
     def resample_spatial(
         self,
-        resolution: Union[int, float, Tuple[float, float], Tuple[int, int]] = 0.0,
+        resolution: Union[float, Tuple[float, float], List[float]] = 0.0,
         projection: Union[int, str, None] = None,
         method: str = "near",
         align: str = "upper-left",
     ) -> DataCube:
-        metadata = (
-            self.metadata.resample_spatial(resolution=resolution, projection=projection) if self.metadata else None
-        )
+        metadata = (self.metadata or CubeMetadata()).resample_spatial(resolution=resolution, projection=projection)
         return self.process(
             process_id="resample_spatial",
             arguments={
@@ -783,8 +790,8 @@ def resample_cube_spatial(self, target: DataCube, method: str = "near") -> DataC
         :param method: Resampling method to use.
         :return:
         """
-        if self.metadata and target.metadata:
-            metadata = self.metadata.resample_cube_spatial(target=target.metadata)
+        if target.metadata:
+            metadata = (self.metadata or CubeMetadata()).resample_cube_spatial(target=target.metadata)
         else:
             metadata = None
         return self.process(

tests/rest/datacube/test_datacube.py

@@ -751,6 +751,26 @@ def test_resample_spatial(s2cube):
     ]
 
 
+def test_resample_spatial_no_metadata(s2cube_without_metadata):
+    cube = s2cube_without_metadata.resample_spatial(resolution=(3, 5), projection=4578)
+    assert get_download_graph(cube, drop_load_collection=True, drop_save_result=True) == {
+        "resamplespatial1": {
+            "process_id": "resample_spatial",
+            "arguments": {
+                "data": {"from_node": "loadcollection1"},
+                "resolution": [3, 5],
+                "projection": 4578,
+                "method": "near",
+                "align": "upper-left",
+            },
+        }
+    }
+    assert cube.metadata.spatial_dimensions == [
+        SpatialDimension(name="x", extent=[None, None], crs=4578, step=3.0),
+        SpatialDimension(name="y", extent=[None, None], crs=4578, step=5.0),
+    ]
+
+
 def test_resample_cube_spatial(s2cube):
     cube1 = s2cube.resample_spatial(resolution=[2.0, 3.0], projection=4578)
     cube2 = s2cube.resample_spatial(resolution=10, projection=32631)
@@ -828,16 +848,27 @@ def test_resample_cube_spatial(s2cube):
     ]
 
 
-def test_resample_cube_spatial_no_metadata(s2cube_without_metadata):
-    cube1 = s2cube_without_metadata.resample_spatial(resolution=[2.0, 3.0], projection=4578)
-    cube2 = s2cube_without_metadata.resample_spatial(resolution=10, projection=32631)
-    assert cube1.metadata is None
-    assert cube2.metadata is None
+def test_resample_cube_spatial_no_source_metadata(s2cube, s2cube_without_metadata):
+    cube = s2cube_without_metadata
+    target = s2cube.resample_spatial(resolution=10, projection=32631)
+    assert cube.metadata is None
+    assert target.metadata is not None
+
+    result = cube.resample_cube_spatial(target=target)
+    assert result.metadata.spatial_dimensions == [
+        SpatialDimension(name="x", extent=None, crs=32631, step=10),
+        SpatialDimension(name="y", extent=None, crs=32631, step=10),
+    ]
 
-    cube12 = cube1.resample_cube_spatial(target=cube2)
-    assert cube12.metadata is None
 
+def test_resample_cube_spatial_no_target_metadata(s2cube, s2cube_without_metadata):
+    cube = s2cube.resample_spatial(resolution=10, projection=32631)
+    target = s2cube_without_metadata
+    assert cube.metadata is not None
+    assert target.metadata is None
 
+    result = cube.resample_cube_spatial(target=target)
+    assert result.metadata is None
 
 
 def test_merge(s2cube, api_version, test_data):