Getting the time, ID, etc. of tiles.

[ATL-Flaneur]

Doing items = catalog.search(…).get_all_items() gives an iterable collection of tiles that's traversable with for item in items:

How can I display the time, id, band, projection, or other metadata in the coordinates and attribute fields?

> item
<xarray.DataArray 'stackstac-17141b516efd194e112f6d943ea1c3f7' (y: 1944, x: 4212)>
array([[28.63329697, 28.29682732, 28.30708313, ..., 26.88253403,
        27.52575111, 28.17367172],
       [28.42001534, 28.24291611, 28.1334362 , ..., 26.72727585,
        26.65990639, 27.01013756],
       [28.40831757, 28.21773911, 27.94297028, ..., 26.78857231,
        26.57504272, 26.60680962],
       ...,
       [        nan,         nan,         nan, ...,         nan,
                nan,         nan],
       [        nan,         nan,         nan, ...,         nan,
                nan,         nan],
       [        nan,         nan,         nan, ...,         nan,
                nan,         nan]])
Coordinates:
    time             datetime64[ns] 2017-03-29
    id               <U10 'n41w075-13'
    band             <U4 'data'
  * x                (x) float64 -74.64 -74.64 -74.64 ... -74.25 -74.25 -74.25
  * y                (y) float64 40.12 40.12 40.12 40.12 ... 39.94 39.94 39.94
    proj:epsg        int64 5498
    gsd              int64 10
    threedep:region  <U6 'n40w80'
    epsg             int64 4326
Attributes:
    spec:        RasterSpec(epsg=4326, bounds=(-74.64, 39.94, -74.25, 40.12),...
    crs:         epsg:4326
    transform:   | 0.00, 0.00,-74.64|\n| 0.00,-0.00, 40.12|\n| 0.00, 0.00, 1.00|
    resolution:  9.259259259259259e-05

[gjoseph92]

@ATL-Flaneur I'm not quite sure what you're asking here. Time, ID, band, projection, and all other STAC metadata are stored in the coordinates of the DataArray (item in your case). If you're not familiar with the xarray data model, you might want to read https://docs.xarray.dev/en/stable/user-guide/data-structures.html#coordinates first to understand how coordinates work.

In this case, it looks like you've used stackstac on a single item. But item.time, item.id, item.band, item["proj:epsg"], etc. will give you that metadata.

[ATL-Flaneur]

@gjoseph92 Thanks for the reply. Appending .values to the calls (e.g., item.id.values) returned the scalar value I was looking for.