Layers and group layers that can be added to maps. For example, basic ArcWeb layers, such as vector, raster tile, and map image; other ArcWeb layers, such as query and thematic maps; as well as overlays ("acetate layers"), such as marker, polyline, or polygon; or API extensions for ArcIMS, ArcGIS Server, GeoRSS, etc.

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	Interface	Description
	IGroupLayer	A group layer is a collection of layers that need to be manipulated as one entity.
	ILayer	A layer is a collection of the same type of features that need to be manipulated as one entity on a map.
	ILayerVisibility	The ILayerVisibility interface designates that a particular layer can have individual LayerVisibility objects toggled on and off.
	IStaticLayer	IStaticLayer is an interface that allows DisplayObjects to be added to the map.

	Class	Description
	GroupLayer	Group layer is a collection of layers that need to be manipulated as one entity.
	LayerVisibility	LayerVisibility sets the visibility for a layer.
	MapImageGroupLayer	MapImageGroupLayer is a group layer that retrieves raster maps from ArcWeb Services Map Image data sources.
	MarkerLayer	A Marker layer with the default marker style.
	OverlayLayer	A layer to hold overlay objects.
	PolygonLayer	A polygon layer with the default polygon style.
	PolylineLayer	A polyline layer with the default polyline style.
	QueryLayer	QueryGroupLayer is a layer that retrieves and displays markers from an ArcWeb Services Spatial Query point data source.
	RasterTileLayer	RasterTileLayer is a layer that retrieves tiled images from an ArcWeb Services Raster Tile data source.
	ThematicGroupLayer	ThematicGroupLayer is a group layer that retrieves thematic maps from an ArcWeb Services Thematic Map Image data source.
	VectorGroupLayer	VectorGroupLayer is a group layer that retrieves vector maps from an ArcWeb Services REST map data source.