Can TileJSON return attribution info?

[mradamcox]

I'm exploring further use of TileJSON within my app that uses TiTiler, because unlike XYZ Tiles it can embed min/max zoom, and also bounds information. According to the TileJSON spec one can also pass attribution along with the return, but I'm not seeing any way to get that property in TiTiler's response. Though the API docs do suggest that it is in the schema:

{
  "tilejson": "2.2.0",
  "name": "string",
  "description": "string",
  "version": "1.0.0",
  "attribution": "string",
  "template": "string",
  "legend": "string",
  "scheme": "xyz",
  "tiles": [
    "string"
  ],
  "grids": [
    "string"
  ],
  "data": [
    "string"
  ],
  "minzoom": 0,
  "maxzoom": 30,
  "bounds": [
    -180,
    -90,
    180,
    90
  ],
  "center": [
    "string",
    "string",
    "string"
  ]
}

I'm using an older version of Titiler ( 0.11.6 ) but still don't see mention of attribution in the latest endpoints docs.

---

I'm not really sure what the best approach to adding attribution to TiTiler's response would be anyway. If it is a new URL parameter, then anyone could change the attribution whenever they make a request. Seems like it would need to be embedded higher up in the response chain. For me, I'm thinking I could make my own endpoint that wraps TiTiler's and then injects the TileJSON with an extra attribution prop. Figured it was still worth bringing up here though, because I can't find mention of the topic in other tickets or discussions.

Thanks!

[vincentsarago]

The Pydantic model we use for the tilejson document has the attribution field

titiler/src/titiler/core/titiler/core/models/mapbox.py

Line 28 in 7f213c4

attribution: Optional[str]

but we are not setting it in the response

titiler/src/titiler/core/titiler/core/factory.py

Lines 656 to 662 in 7f213c4

	with self.reader(src_path, tms=tms, **reader_params) as src_dst:
	return {
	"bounds": src_dst.geographic_bounds,
	"minzoom": minzoom if minzoom is not None else src_dst.minzoom,
	"maxzoom": maxzoom if maxzoom is not None else src_dst.maxzoom,
	"tiles": [tiles_url],
	}

We could add an option to add one by default 👍