Base class for web map operational layers and basemap layers.
Part of the Esri web map specification. See http://resources.arcgis.com/en/help/arcgis-web-map-json/.
A unique identifying string for the layer.
Not in official spec, but present in some newer web maps.
The degree of transparency applied to the layer on the client side, where 0 is full transparency and 1 is no transparency.
The URL to the layer. For well-known basemap types such as Bing Aerial, the URL should be empty.
Determines whether the layer is initially visible in the web map.
Base class for web map operational layers and basemap layers.
Part of the Esri web map specification. See http://resources.arcgis.com/en/help/arcgis-web-map-json/.