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/issues/877#issuecomment-224685210,https://api.github.com/repos/pydata/xarray/issues/877,224685210,MDEyOklzc3VlQ29tbWVudDIyNDY4NTIxMA==,9618134,2016-06-08T18:31:14Z,2016-06-08T18:31:14Z,NONE,"Yep, that fixed it. Perhaps it could raise a flag if it removes a coordinate as a result of small mismatches in the coordinates? The mismatch was very small (and surprising as the grid area file was actually made from the other file by using cdo `cdo gridarea infile outfile`). Thanks @jhamman  and @shoyer for the help.
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,159222357
https://github.com/pydata/xarray/issues/877#issuecomment-224680348,https://api.github.com/repos/pydata/xarray/issues/877,224680348,MDEyOklzc3VlQ29tbWVudDIyNDY4MDM0OA==,1217238,2016-06-08T18:14:46Z,2016-06-08T18:14:46Z,MEMBER,"There's likely a slight difference in the latitude values due to numerical precision and rounding.

Try using `reindex` or `reindex_like` with `method='nearest'`:

```
gridarea = gridarea.reindex_like(ncscd_d30cm, method='nearest', tolerance=0.01)
```

This is an tricky thing to fix automatically because we need some heuristic to pick a default tolerance. See https://github.com/pydata/pandas/issues/9817 for related discussion on the pandas side.
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,159222357
https://github.com/pydata/xarray/issues/877#issuecomment-224675672,https://api.github.com/repos/pydata/xarray/issues/877,224675672,MDEyOklzc3VlQ29tbWVudDIyNDY3NTY3Mg==,9618134,2016-06-08T17:58:45Z,2016-06-08T17:58:45Z,NONE,"Sorry, I tried a few different ways so that output must have been from an earlier one. I just reconfirmed, If make them all `DataArray`, I have the same problem.
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,159222357
https://github.com/pydata/xarray/issues/877#issuecomment-224672528,https://api.github.com/repos/pydata/xarray/issues/877,224672528,MDEyOklzc3VlQ29tbWVudDIyNDY3MjUyOA==,2443309,2016-06-08T17:48:11Z,2016-06-08T17:48:11Z,MEMBER,"Something looks wrong in your example (I updated you markdown syntax btw).  

``` Python
ncscd_total30cm = gridarea.cell_area * ncscd_d30cm
```

should return a `DataArray`, not a `Dataset` as you have shown.  Can you check to make sure you are multiplying two `DataArray`s?
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