This looks awesome and inspirative.
> * Package name : kosmindoormap > Version : 22.08.2 > Upstream Author : Volker Krause <vkra...@kde.org> > * URL : https://invent.kde.org/libraries/kosmindoormap > * License : LGPL-2.0-or-later > Programming Lang: C++ (Qt) > Description : Open Street Map indoor map renderer of for example a > (large) train station. > > It is a library and QML module to show OSM indoor maps.