Persist raster tile CRS metadata

backend/app/services/raster_operations_service.py

@@ -939,8 +939,13 @@ class RasterOperationsService:
 
         manifest_tiles: list[dict[str, Any]] = []
         tile_paths: list[str] = []
+        source_crs: str | None = None
 
         with rasterio.open(dataset.storage_path) as source:
+            raw_source_crs = getattr(source, "crs", None)
+            source_crs = raw_source_crs.to_string() if hasattr(raw_source_crs, "to_string") else (
+                str(raw_source_crs) if raw_source_crs else dataset.crs
+            )
             source_count = getattr(source, "count", 0)
             if not source_count:
                 source_count = 1
@@ -981,6 +986,7 @@ class RasterOperationsService:
                             "pixel_window": [int(xoff), int(yoff), int(tile_width), int(tile_height)],
                             "bounds": RasterOperationsService._window_bounds_to_list(bounds),
                             "transform": [float(item) for item in transform.to_gdal()],
+                            "crs": source_crs,
                             "index": tile_index,
                         },
                     )
@@ -994,10 +1000,14 @@ class RasterOperationsService:
         except AppError:
             source_metadata = {"bounds": [0.0, 0.0, 0.0, 0.0]}
         bounds = source_metadata.get("bounds", [0.0, 0.0, 0.0, 0.0])
+        manifest_crs = source_crs or source_metadata.get("crs") or dataset.crs
         manifest_payload = {
             "tile_set_id": tile_set_id,
             "source_dataset_id": str(dataset.id),
             "source_raster_id": str(dataset.id),
+            "crs": manifest_crs,
+            "source_crs": manifest_crs,
+            "dataset_crs": dataset.crs,
             "bounds": [float(value) for value in bounds],
             "tile_size": int(tile_size),
             "overlap": int(overlap),