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Provide fill_value, dtype to fetch_raster_window #114

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Provide fill_value, dtype to fetch_raster_window #114

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8 changes: 7 additions & 1 deletion stackstac/to_dask.py
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Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,8 @@ def items_to_dask(
"tb",
slices_fake_arr,
"yx",
window_dtype=dtype,
fill_value=fill_value,
meta=np.ndarray((), dtype=dtype), # TODO dtype
)
return rasters
Expand Down Expand Up @@ -161,6 +163,8 @@ def asset_entry_to_reader_and_window(
def fetch_raster_window(
asset_entry: Optional[Tuple[Reader, windows.Window]],
slices: Tuple[slice, ...],
window_dtype: np.dtype = np.dtype("float64"),
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@TomAugspurger TomAugspurger Dec 20, 2021 •
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Using the keyword window_dtype, instead of dtype, to avoid a conflict with blockwise using dtype as well.

fill_value: Optional[Union[int, float]] = np.nan,
) -> np.ndarray:
current_window = windows.Window.from_slices(*slices)
if asset_entry is not None:
Expand All @@ -175,4 +179,6 @@ def fetch_raster_window(

# no dataset, or we didn't overlap it: return empty data.
# use the broadcast trick for even fewer memz
return np.broadcast_to(np.nan, (1, 1) + windows.shape(current_window))
return np.broadcast_to(
np.array(fill_value, dtype=window_dtype), (1, 1) + windows.shape(current_window)
)