Merge pull request astropy#163 from astrofrog/fix-ordering

Fix bug in auto-identification of HEALPix ordering
astrofrog · Sep 15, 2018 · ac80b69 · ac80b69
2 parents c2a43cc + cd1155a
commit ac80b69
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diff --git a/CHANGES.md b/CHANGES.md
@@ -4,6 +4,9 @@
 - Improve parse_output_projection to make it so that the output projection
   can be specified as a filename. [#150]
 
+- Fixed a bug that caused HEALPix maps in RING order to not be correctly
+  interpreted. [#163]
+
 0.4 (2018-01-29)
 ----------------
 

diff --git a/reproject/healpix/utils.py b/reproject/healpix/utils.py
@@ -39,7 +39,7 @@ def parse_input_healpix_data(input_data, field=0, hdu_in=None, nested=None):
         coordinate_system_in = parse_coord_system(header['COORDSYS'])
         array_in = data[data.columns[field].name].ravel()
         if 'ORDERING' in header:
-            nested = header['ORDERING'].lower()
+            nested = header['ORDERING'].lower() == 'nested'
     elif isinstance(input_data, six.string_types):
         hdu = fits.open(input_data)[hdu_in or 1]
         return parse_input_healpix_data(hdu, field=field)