issue_comments: 58568933

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https://github.com/pydata/xarray/issues/214#issuecomment-58568933 https://api.github.com/repos/pydata/xarray/issues/214 58568933 MDEyOklzc3VlQ29tbWVudDU4NTY4OTMz 291576 2014-10-09T20:05:01Z 2014-10-09T20:05:01Z CONTRIBUTOR

Consider the following Dataset:

<xray.Dataset> Dimensions: (lv_HTGL1: 2, lv_HTGL3: 2, lv_HTGL5: 2, lv_HTGL6: 2, lv_ISBL0: 37, lv_SPDL2: 6, lv_SPDL4: 3, time: 9, xgrid_0: 451, ygrid_0: 337) Coordinates: * xgrid_0 (xgrid_0) int64 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ... * ygrid_0 (ygrid_0) int64 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ... * lv_ISBL0 (lv_ISBL0) float32 10000.0 12500.0 15000.0 17500.0 20000.0 ... * lv_HTGL6 (lv_HTGL6) float32 1000.0 4000.0 * lv_HTGL1 (lv_HTGL1) float32 2.0 80.0 * lv_HTGL3 (lv_HTGL3) float32 10.0 80.0 latitude (ygrid_0, xgrid_0) float32 16.281 16.3084 16.3356 16.3628 16.3898 ... longitude (ygrid_0, xgrid_0) float32 233.862 233.984 234.106 234.229 ... * lv_HTGL5 (lv_HTGL5) int64 0 1 * lv_SPDL2 (lv_SPDL2) int64 0 1 2 3 4 5 * lv_SPDL4 (lv_SPDL4) int64 0 1 2 * time (time) datetime64[ns] 2014-09-25T01:00:00 ... Variables: gridrot_0 (ygrid_0, xgrid_0) float32 -0.229676 -0.228775 -0.227873 ... TMP_P0_L103_GLC0 (time, lv_HTGL1, ygrid_0, xgrid_0) float64 295.8 295.7 295.7 295.7 ...

The latitude and longitude variables are both dependent upon xgrid_0 and ygrid_0. Meanwhile...

<xray.Dataset> Dimensions: (station: 120, time: 4) Coordinates: latitude (station) float32 34.805 34.795 34.585 36.705 34.245 34.915 34.195 36.075 ... * station (station) int64 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ... sixhourly (time) int64 0 1 2 3 longitude (station) float32 -98.025 -96.665 -99.335 -98.705 -95.665 -98.295 ... * time (time) datetime64[ns] 2014-10-07 2014-10-07T06:00:00 ... Variables: MaxGust (station, time) float64 7.794 7.47 8.675 4.788 7.071 7.903 8.641 5.533 ...

the latitude and longitude variables are independent of each other (they are 1-D).

The variable in the first one can not be accessed directly by lat/lon values, while the MaxGust variable in the second one can. This poses some difficulties.

 
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