:mod:`odc.stac` can operate on STAC items with only minimal information present,
however user experience is best when following information is included:
data_type and nodata from Raster Extension, proj:{shape,transform,epsg}
from Projection Extension.
For a full list of understood extension elements see table below.
| Raster Extension | |
data_type |
used to determine output pixel type |
nodata |
used when combining multiple items into one raster plane |
unit |
passed on as an attribute (can be useful for further processing) |
[planned] scale, offset |
currently ignored, but will be supported in the future |
| Projection Extension | |
proj:shape |
contains image size per asset |
proj:transform |
contains geo-registration per asset |
proj:epsg |
contains native CRS |
proj:wkt2, proj:projjson |
can be used instead of proj:epsg for CRS without EPSG code |
| Electro Optical Extension | |
eo:bands.common_name |
used to assign an alias for a band
(use red instead of B04). |
Items from the same collection are assumed to have the same number and names of
bands, and bands are assumed to use the same data_type across the
collection.
It is assumed that Assets within a single Item share common native projection.