A legend is a table or chart associated with a mapA map is a collection of layers that are displayed in 2D. It is typically composed of a basemap layer and data layers.Learn more to indicate the meaning of the map's various symbolsA symbol defines the properties used to display a geometry or text.Learn more and layerA layer is a reference to a collection of geographic data that is used to access and display data. The data for layers are typically provided by the basemap layer service and data services.Learn more representations.