Developed in response to a competitive tender by the NSW government to provide added value for open data, the Solar Atlas is a way to assess roof suitability for solar PV, at scale (locality / region) and at a high level of granularity allowed by LiDAR data(30cm).
The Solar Atlas platform is a collaboration with UrbanEP’s Nathan Toovey and Nathan Malin. Their website has an extensive write-up of the project.