A layer is a browsable unit in Geo Engine.
In general, it is a named Workflow with additional meta information like a description and a default Colorizer.
Layers are identified by a LayerId, which is usually a UUID.
Every layer can be part of one or more Layer collections.
Layer collections are groups of Layers.
The collections themselves can be grouped inside other collections.
Every layer collection has a name and a description.
Layer collections, just like layers, can be part of one or more other layer collections.
Inside Geo Engine's web interface, you can browse the available layers and layer collections when adding data.
Inside Python, you can use the
function to get a list of the root collection which contains paths to all underlying layers.