issues: 109589162

This data as json

id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
109589162 MDU6SXNzdWUxMDk1ODkxNjI= 605 Support Two-Dimensional Coordinate Variables 2443309 closed 0   741199 11 2015-10-02T23:27:18Z 2016-07-31T23:02:46Z 2016-07-31T23:02:46Z MEMBER      

The CF Conventions supports the notion of a 2d coordinate variable in the case of irregularly spaced data. An example of this sort of dataset is below. The CF Convention is to add a "coordinates" attribute with a string describing the 2d coordinates.

dimensions: xc = 128 ; yc = 64 ; lev = 18 ; variables: float T(lev,yc,xc) ; T:long_name = "temperature" ; T:units = "K" ; T:coordinates = "lon lat" ; float xc(xc) ; xc:axis = "X" ; xc:long_name = "x-coordinate in Cartesian system" ; xc:units = "m" ; float yc(yc) ; yc:axis = "Y" ; yc:long_name = "y-coordinate in Cartesian system" ; yc:units = "m" ; float lev(lev) ; lev:long_name = "pressure level" ; lev:units = "hPa" ; float lon(yc,xc) ; lon:long_name = "longitude" ; lon:units = "degrees_east" ; float lat(yc,xc) ; lat:long_name = "latitude" ; lat:units = "degrees_north" ;

I'd like to discuss how we could support this in xray. There motivating application for this is in plotting operations but it may also have application in other grouping and remapping operations (e.g. #324, #475, #486).

One option would just to honor the "coordinates" attr in plotting and use the specified coordinates as the x/y values.

ref: http://cfconventions.org/Data/cf-conventions/cf-conventions-1.6/build/cf-conventions.html#idp5559280

 
{
    "url": "https://api.github.com/repos/pydata/xarray/issues/605/reactions",
    "total_count": 0,
    "+1": 0,
    "-1": 0,
    "laugh": 0,
    "hooray": 0,
    "confused": 0,
    "heart": 0,
    "rocket": 0,
    "eyes": 0
}
   completed 13221727 issue

Links from other tables