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rasterio backend: added nodatavals attribute #1740

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merged 8 commits into from
Jan 19, 2018
Merged

rasterio backend: added nodatavals attribute #1740

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6106874
Added nodatavals attribute
snowman2 Nov 23, 2017
12007f3
Replace None nodatavals with np.nan
snowman2 Dec 5, 2017
f25e829
Fix typo
snowman2 Dec 9, 2017
f4a2851
Added nodatavals open_rasterio information.
snowman2 Dec 9, 2017
e005abb
added issue and author information
Jan 13, 2018
e27023b
added tests for nodatavals attr
Jan 13, 2018
c0cd331
moved back to nan
Jan 13, 2018
a2b72cb
added separate test for missing nodataval
Jan 18, 2018
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1 change: 1 addition & 0 deletions doc/whats-new.rst
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Expand Up @@ -20,6 +20,7 @@ v0.10.1 (unreleased)

Enhancements
~~~~~~~~~~~~
- Added nodatavals attribute to dataset when using open_rasterio.
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If you want you can credit yourself here. If you do so it would be good also to link to the original issue (see examples below) and to rename dataset do DataArray


Bug fixes
~~~~~~~~~
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4 changes: 4 additions & 0 deletions xarray/backends/rasterio_.py
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Expand Up @@ -157,6 +157,10 @@ def open_rasterio(filename, chunks=None, cache=None, lock=None):
# Affine transformation matrix (tuple of floats)
# Describes coefficients mapping pixel coordinates to CRS
attrs['transform'] = tuple(riods.transform)
if hasattr(riods, 'nodatavals'):
# The nodata values for the raster bands
attrs['nodatavals'] = tuple([np.nan if nodataval is None else nodataval
for nodataval in riods.nodatavals])

data = indexing.LazilyIndexedArray(RasterioArrayWrapper(riods))

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