Layers display image of vector datas on the map, usually loaded from a remote datasource. There is a lot of different kind of layers (WMS, OpenStreetMap, KML ...)

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	Class	Description
	FeatureLayer	Layer that display features stored as child element
	Grid	Base class for layers that use a lattice of tiles.
	HTTPRequest	Base class for layers based on a remote image server
	ImageLayer
	KML
	Layer	A Layer display image of vector datas on the map, usually loaded from a remote datasource.
	TMS	The Tiled Web Service provides access to resources, in particular, to rendered cartographic tiles at fixed scales.