Best Practices

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).

Assumptions

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.