issue_comments: 401028473

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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/2255#issuecomment-401028473 https://api.github.com/repos/pydata/xarray/issues/2255 401028473 MDEyOklzc3VlQ29tbWVudDQwMTAyODQ3Mw== 306380 2018-06-28T13:08:58Z 2018-06-29T14:00:19Z MEMBER

```python import os if not os.path.exists('myfile.tif'): import requests response = requests.get('https://oin-hotosm.s3.amazonaws.com/5abae68e65bd8f00110f3e42/0/5abae68e65bd8f00110f3e43.tif') with open('myfile.tif', 'wb') as f: f.write(response.content)

import dask dask.config.set({'array.chunk-size': '1MiB'})

import xarray as xr ds = xr.open_rasterio('myfile.tif', chunks=True) # this only reads metadata to start

ds.chunks ((1, 1, 1), (1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 136), (1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 1024, 995)) ```

Also depends on https://github.com/dask/dask/pull/3679 . Without that PR it will use values that are similar, but don't precisely align with 1024.

Oh, I should point out that the image has tiles of size (512, 512)

 
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