Google Photorealistic 3D Tiles coverage

We’re building an application that uses Photorealistic 3D Tiles from Google, and we’re trying to figure out a way to tell if a certain location has 3D building data or not.

There’s a feature in Google Earth that displays exact areas with 3D coverage:

Is there a way to access this coverage data so that we can use it in our app?

If you have the data locally, and it is an ascii /text file , I guess a simple script can check that .

If the data-file is binary, you will need some sort of libraries/api from google? to extract the information …
unless it is an open"source"/public format just like jpeg or png …