Merge pull request #575 from astrofrog/hips-fixes-3

Fixes to NaN padding in HiPS

Author: astrofrog

reproject/hips/_trim_utils.py

@@ -44,7 +44,12 @@ def fits_getdata_untrimmed(filename, *, tile_size, tile_depth):
         tile_size - shape[2] - pad_before[2],
     )
 
-    data = np.pad(data, list(zip(pad_before, pad_after, strict=False)))
+    data = np.pad(
+        data,
+        list(zip(pad_before, pad_after, strict=False)),
+        mode="constant",
+        constant_values=np.nan,
+    )
 
     assert data.shape == (tile_depth, tile_size, tile_size)
 

reproject/hips/high_level.py

@@ -471,7 +471,7 @@ def process(index):
     if tile_format == "fits":
         generated_properties["hips_pixel_bitpix"] = -64
         if not np.isinf(pixel_min) and not np.isinf(pixel_max):
-            properties["hips_pixel_cut"] = f"{pixel_min} {pixel_max}"
+            generated_properties["hips_pixel_cut"] = f"{pixel_min} {pixel_max}"
 
     generated_properties.update(properties)
 
@@ -583,7 +583,7 @@ def compute_lower_resolution_tiles(
             if ndim == 2:
 
                 if tile_format == "fits":
-                    array = np.zeros((tile_size, tile_size))
+                    array = np.zeros((tile_size, tile_size)) * np.nan
                 elif tile_format == "png":
                     array = np.zeros((tile_size, tile_size, 4), dtype=np.uint8)
                 else: