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fix: preserve parent coordinate dtype in overview levels #47

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fix: preserve parent coordinate dtype in overview levels #47

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10 changes: 7 additions & 3 deletions src/eopf_geozarr/conversion/geozarr.py
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Original file line number Diff line number Diff line change
Expand Up @@ -935,10 +935,14 @@ def create_overview_dataset_all_vars(
# Calculate the transform for this overview level
overview_transform = rasterio.transform.from_bounds(*native_bounds, width, height)

# Create coordinate arrays
# Determine coordinate dtype from parent dataset to maintain alignment
parent_x_dtype = ds.coords["x"].dtype if "x" in ds.coords else np.float64
parent_y_dtype = ds.coords["y"].dtype if "y" in ds.coords else np.float64

# Create coordinate arrays preserving parent dtype
left, bottom, right, top = native_bounds
x_coords = np.linspace(left, right, width, endpoint=False)
y_coords = np.linspace(top, bottom, height, endpoint=False)
x_coords = np.linspace(left, right, width, endpoint=False, dtype=parent_x_dtype)
y_coords = np.linspace(top, bottom, height, endpoint=False, dtype=parent_y_dtype)

# Check if we're dealing with geographic coordinates (EPSG:4326)
if native_crs and native_crs.to_epsg() == 4326:
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