issue_comments: 279064452

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https://github.com/pydata/xarray/pull/1260#issuecomment-279064452 https://api.github.com/repos/pydata/xarray/issues/1260 279064452 MDEyOklzc3VlQ29tbWVudDI3OTA2NDQ1Mg== 10050469 2017-02-10T21:00:16Z 2017-02-10T21:00:16Z MEMBER

Before I'll get more into details with what needs to be done with rasterio itself, I'd like to get some xarray internals ready first. No need to do a full review yet, but I'd appreciate help with the following points:

  1. The order of the variables and coordinates is random. The current __repr__ can look like this:

<xarray.Dataset> Dimensions: (band: 1, x: 4, y: 3) Coordinates: * x (x) float64 1.0 1.5 2.0 2.5 * band (band) int64 1 * y (y) float64 2.0 1.0 0.0 Data variables: lat (y, x) float64 2.0 2.0 2.0 2.0 1.0 1.0 1.0 1.0 0.0 0.0 0.0 0.0 raster (band, y, x) float32 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 ... lon (y, x) float64 1.0 1.5 2.0 2.5 1.0 1.5 2.0 2.5 1.0 1.5 2.0 2.5 Attributes: crs: CRS({'wktext': True, 'proj': 'longlat', 'no_defs': True, 'ellps': 'WGS84'}) transform: [1.0, 0.5, 0.0, 2.0, 0.0, -1.0] How is this possible?

  1. Is it possible to make the x and y coords lazy? Could you point me on a place in the code where this has been done already?

  2. I'd like to have the lon and lat variables listed as optional coordinates, and also make them lazy. Any hint?

Thanks a lot for your help, I'm afraid this is going to need a few iterations ;-)

 
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