buildTileUrlTemplate in config.js as an async function

[randyberos]

trafficstars

We are using a Titiler server for rendering the COG image in the map. To have a better visual of the tiled image, we need to provide the rescale value of the COG image to the Titiler server. We are currently querying the percent_2 and percent_98 of the band statistics using the /cog/statistics of Titiler. Querying the statistics of the COG image requires the buildTileUrlTemplate to be asynchronous. This causes an error because stac-layer is not expecting an async buildTileUrlTemplate function. Below is the snippet of the error.

Is it possible for the buildTileUrlTemplate to expect an async function?

error:

[stac-layer] caught the following error while trying to add a tile layer: TypeError: str.replace is not a function

[DanielJDufour]

Hi, @randyberos . Great suggestion. On first read, I think this should be possible. Would you be interested in submitting a PR to https://github.com/stac-utils/stac-layer ?

[m-mohr]

This would also need to be implemented in ol-stac, which we'll migrate to.

Also important to note is that this may break existing configs and needs a big warning in the changelog!

[randyberos]

Hello @DanielJDufour. I created a pull request for this issue. Thanks.

[m-mohr]

ol-stac supports this in the next version, this will be part of STAC Browser iun v3.4.0. Development version for testing: #535