Google Maps Engine basics
Sharing map components and maps
Every asset in the Google Maps Engine catalog (data sources, layers, and maps) has at least one sharing setting that determines who can interact with it.
There are three kinds of sharing settings:
This figure shows that development sharing settings apply until a map is published; viewer sharing settings then apply.
When you create a map, its sharing settings supersede the sharing settings of its component layers. If a map includes confidential data sources or layers, be sure that the map-level access supports that confidentiality.