Meaning
A Layer answers how selected data is presented on a map. Data identity and presentation are deliberately separate.
Owns
explicit subset of its Channels.
- Name, visibility, ordering, and visual style.
- Color, opacity, labels, clustering, and visualization mode.
- An immutable binding to a resolved Provider and an
Defaults
Catalog defaults are applied only when a new Layer is created. Later changes to Data Product or Channel defaults must not silently restyle existing maps.
Composition
A Layer belongs to one Map. Multiple layers may visualize the same Provider differently without duplicating the underlying data source.