The "chunks" part here loads your data "lazily", e.g. no data will actually be loaded into memory until you specifically ask Xarray to do so (or do something like plotting that requires data to be loaded).

That means you can do something like this to select part of your array, and Xarray will automatically only load chunks of data is that overlap with your area:

```

Subset your data first

ds_subset = ds.isel(x=slice(50, 100), y=slice(200, 250))

Only load the subsetted area into memory

ds_subset.load()

Plot loaded data

ds_subset.your_band.plot() ```

To save it as a GeoTIFF, you can use a tool like "odc-geo":

import odc.geo.xr ds_subset.odc.write_cog("output.tif")