The default base map is composed of 4 layers, plus a style.
Giraffe projects start with a few layers by default:
Default - a blank drawing layer
Basemap Group
Map labels - Street names, cities, and regions from Mapbox
3D buildings - 3D white building massing from Open Street Map
POI Labels - Points of interest like restaurants, retail, and community hubs
Transit Labels - Transit stops
Landmark Buildings - Beautifully modeled, architecturally significant buildings, provided by Mapbox
Trees - 3D trees that approximate real-life conditions by Mapbox
Satellite - Global Satellite imagery From Mapbox
Note: Your project may have different layers if you did not use a Giraffe template, or you removed one or more layers.
If your project is missing the Base map layers, search the Layer Library for "base map" to re-add them!