WIP: Array.as_xarray

[kylebarron]

This is just a proof of concept.

Change list

• Add Array.as_xarray method, returning a DataArray
  • Set index via rasterix
  • Set projection info via xproj
• How do we represent nodata and mask? Depending on rioxarray is probably a non-starter, because I don't think we should be depending on rasterio.

[dcherian]

What's the difference between nodata and mask?

[kylebarron]

What's the difference between nodata and mask?

Nodata is a single value, i.e. 0 or NaN or 255 used as a sentinel value. Mask is a boolean array that has shape (height, width, 1) and has a boolean for whether each pixel is valid/invalid.