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cityjson / specs

Specifications for CityJSON, a JSON-based encoding for 3D city models
https://cityjson.org
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Is an empty boundaries array allowed? #190

Closed hugoledoux closed 9 months ago

hugoledoux commented 9 months ago

Discussed in https://github.com/cityjson/specs/discussions/188

Originally posted by **balazsdukai** November 21, 2023 Geometries are not obligatory for CityObjects, so we have three valid options: - `{ "type": "Building" }` - `{ "type": "Building", "geometries": [ ] }` - `{ "type": "Building", "geometries": [ ... ] }` Then, a `Geometry` object must have a `"boundaries"` member with an array of vertex indices. But the specs does not explicitly allow or forbid empty arrays, such as `"boundaries": [ ]`. In my opinion, it does not make much sense to have a Geometry object with empty boundaries, but it can happen. For instance due to a failed procedure that creates the geometry. Should we consider an empty `boundaries` a valid or invalid CityJSON?
hugoledoux commented 9 months ago

oups duplicate of #189 , closing this