html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/3013#issuecomment-501075199,https://api.github.com/repos/pydata/xarray/issues/3013,501075199,MDEyOklzc3VlQ29tbWVudDUwMTA3NTE5OQ==,191850,2019-06-12T00:37:24Z,2019-06-12T00:37:24Z,CONTRIBUTOR,"thank you @dcherian!

I added `offsets`, `units`, `descriptions` attributes. The other attributes (`res`, `nodata`, `crs`,  `transform`, `bounds` and `res`) were already available.

`mask_flag_enums` is a list of tuples, I have tried to add this attribute too but the `TestRasterio::test_serialization` fails with the message:

```python
>   ???
E   ValueError: multi-dimensional array attributes not supported

netCDF4/_netCDF4.pyx:1529: ValueError
```

@fmaussion any feedback is welcome!
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,454337592
https://github.com/pydata/xarray/pull/3013#issuecomment-501014979,https://api.github.com/repos/pydata/xarray/issues/3013,501014979,MDEyOklzc3VlQ29tbWVudDUwMTAxNDk3OQ==,191850,2019-06-11T20:42:37Z,2019-06-11T20:42:37Z,CONTRIBUTOR,"> Does rasterio define a set of valid attributes or can you assign arbitrary attributes? If so, should we read and assign all attributes as we do for netCDF files?

@dcherian the attributes are pre-defined. Looking at the source code[1] of rasterio I found this list:

```property nodatavals             # Nodata values for each band
property nodata                 # The dataset's single nodata value
property mask_flag_enums        # Sets of flags describing the sources of band masks.
property crs                    # The dataset's coordinate reference system
property descriptions           # Descriptions for each dataset band
property transform              # The dataset's georeferencing transformation matrix
property offsets                # Raster offset for each dataset band
property scales                 # Raster scale for each dataset band
property units                  # A list of str: one units string for each dataset band
property bounds                 # Returns the lower left and upper right bounds of the dataset
property res                    # Returns the (width, height) of pixels in the units of its
```

I belive that the attributes not handled yet by xarray are: **scales, offsets and units**.

[1] - https://github.com/mapbox/rasterio/blob/1.0.24/rasterio/_base.pyx","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,454337592