Available Layer Groups:
land - Land areas and terrainwater - Water bodies (oceans, lakes, rivers)borders - Country and administrative boundariesbuildings2D - 2D building footprintsbuildings3D - 3D building modelshouseNumbers - House number labelsroadLines - Road line geometriesroadLabels - Street name labelsroadShields - Highway shields (e.g., I-95, A1)placeLabels - General place labelssmallerTownLabels - Small town/village labelscityLabels - City labelscapitalLabels - Capital city labelsstateLabels - State/province labelscountryLabels - Country name labels
Name of a base map layer group.
Identifies specific categories of base map layers that can be controlled together.