The @w3c Spatial Data on the Web #InterestGroup now reviews CityJSON cityjson.org/en/0.5/, a format for encoding a subset of the CityGML data model using #json
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CityJSON makes it easier for #developers to manipulate city displays (roads,buildings, etc.) at any kind of detail level.

Feb 20, 2018 · 2:18 PM UTC

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Another topic currently discussed at this SDW #f2fmeeting is MapML, a proposed text format for encoding map information with the goal of displaying modern interactive Web #maps.
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Could MapML help add semantics and improve #accessibility for #maps on the Web?
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MapML is being developed by the @w3c Maps For HTML #CommunityGroup w3.org/community/maps4html/
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#developers should join this group to discuss, for example, how they'd like to use #maps: within browsers or using external libraries? etc.