We’re happy that the version 1.0.0 of CityJSON has been launched!
It took us less than 2 years (first commit was 19 June 2017) to build a JSON-encoding of the CityGML data model 2.0.0.
It comes with several software packages, full open specifications, and all existing CityGML datasets can be converted in one-click to CityJSON (and vice-versa).
And we have a new website: https://cityjson.org
While CityJSON is mostly made and maintained by us, everyone is welcome to contribute by submitting new content and/or fixing errors.