OpenStreetMap is just a database. It has no concept of layers (except the `layers=` tag used for stacking order of objects e.g. bridges). Products which use Ope

OpenStreetMap is just a database. It has no concept of layers (except the `layers=` tag used for stacking order of objects e.g. bridges). Products which use OpenStreetMap data are free to apply whatever "layer" abstractions in their UIs they like.