In what way? https://developers.google.com/maps/documentation/tile/use-re...

  Photorealistic 3D Tiles are in the OGC standard glTF format, meaning you can use any renderer that supports the OGC 3D Tiles spec to build your 3D visualizations.

Not the OP, but the editorialized title (please don't do that) seems to suggest that it's freely available, which it is not.

Sorry but how exactly? There is another comment too that hints towards this sentiment but I really don't know how you can mistake "open standard".

I understand many people are familiar with what "open standard" means. There are lots of other people that are somewhat new to the phrase.

Consider these related terms:

- Open Source

- Open Data

- Open Standard

For people who encounter these terms in the listed order, "Open Standard" may or may not be understood by analogy. Some people will assume that it also includes the concepts of Open Source and Open Data. It does not.