Arc
A layer that can visualize data from an ArcGIS map service or a local TileCache by using previously generated tiles. ArcGIS tiled layers consume image tiles provided by an ArcGIS map service or a local tile package. Raster tiles are cached at various scales when the map service is created. This API requests the tiles needed at a particular map extent. ArcGISTiledLayer will display data from an ArcGIS MapServer if "Single Fused Map Cache" is set to true in its ArcGIS REST Services Directory.
You can use the ExportTileCacheTask class to generate and download tiles from the service, creating a tile package (.tpk/.tpkx) for use locally on the device. Alternatively, you can use ArcGIS Pro to create a map tile package and provision it to the device.
Functional characteristics
ArcGIS tiled layers do not support reprojection, query, select, identify, or editing.
Performance characteristics
Tiled image layers (those that derive functionality from the ImageTiledLayer class) provide fast display of geographic imagery stored in raster files. These rasters typically contain image data acquired from satellite, aircraft, or drones. The resolution of such imagery can be very high, providing a detailed view. With increased resolution comes increased file sizes and potentially slower performance.
Raster tiling is a process that resamples the pixel size at different scales to create images with the appropriate resolution for each scale. The tiling process creates level-of-detail pyramids to efficiently manage how much detail you see as you zoom in and out on the map. Typically, as you zoom closer to the Earth's surface, you want to see greater detail of the geographic information. Tiled image layers allow you to see just the information you need very quickly based on the level-of-detail pyramid at a particular scale, rather than having to load a single large image at once.
Tiles are generated by the server when the service is created. Requests for tiles are made on multiple threads and handled asynchronously. The size of each returned tile increases as the resolution or complexity of the image in the tile increases. For example, high-resolution imagery tiles can be result in larger file sizes than topographic mapping for the same area and map extent.
Since
200.1.0
See also
Constructors
Creates an ArcGIS tiled layer from a PortalItem representing an ArcGIS map service. The item's type should be PortalItemType.MapService.
Creates an ArcGIS Tiled Layer object from a local cache of previously rendered map tiles.
Creates an ArcGIS tiled layer from the specified URI. If the specified URI is a map service URL, the MapServer must have "Single Fused Map Cache" set to true in its ArcGIS REST Services Directory. If the specified URI is a portal item URL, the underlying PortalItem is created and can be accessed through Layer.item. See PortalItem.PortalItem(String) for the supported URL formats.
Properties
The ArcGIS map service information. This information is available after the layer has successfully loaded.
The local tiled cache. This property is populated if the ArcGISTiledLayer has been loaded from a local tile package (.tpk/.tpkx).
The read-only collection sublayers in an ArcGIS tiled layer.
Inherited properties
An API key is a unique key used to authorize access to specific services and resources in ArcGIS Online. It is also used to monitor access to those services.
The attribution string for the image tiled layer.
The brightness of the layer.
A flag indicating whether the layer content's visibility can be changed. A flag indicating whether the layer content visibility can be changed. Will return false if an error occurs.
The description for the layer.
The full extent of this layer, which is the extent where all layer data is contained. You can use this to zoom to all of the data contained in this layer. For feature layers, the extent is retrieved from its FeatureTable.extent.
The unique identifying string for the layer, as specified in a map or scene. The id is used by other parts of this API to refer to a specific Layer, such as in a set of FeatureFenceParameters or a FacilityLayerDefinition. If not supplied, all layers will be assigned a unique id when created.
True if the layer supports identify, false otherwise. The value of this property may not be correct until the layer is in a fully loaded state.
The load status.
The maximum scale for the layer. The maximum scale at which this layer is visible. If the map or scene is zoomed in beyond this scale, the layer will not be visible. A value of 0 means there is no maximum scale threshold and the layer will be visible at the smallest scale available for the map or scene. If the value is nil, there is no maximum scale. All of the connected map and scene views will be updated.
The minimum scale for the layer. The minimum scale at which this layer is visible. If the map or scene is zoomed out beyond this scale, the layer will not be visible. A value of 0 means there is no minimum scale threshold and the layer will be visible at the largest scale available for the map or scene. If the value is nil, there is no minimum scale. All of the connected map and scene views will be updated.
Controls how a tile request that returns 'NoData' is resampled. Zooming in can result in tile requests with no tiles at the requested level of detail. In this case, there are options that control what to display where the tile should be including:
The objects refresh interval. The refresh interval, in milliseconds. A refresh interval of null means never refresh.
A flag indicating whether the layer content participates in the legend. A flag indicating whether the layer content is shown in the legend.
The spatial reference of the layer.
The sub layer contents of a layer content.
Callback invoked when the visibility of the layer changes.
Functions
Clones the ArcGISTiledLayer.
Inherited functions
Cancels loading metadata for the Loadable object.
Fetches the list of legend info.
Returns the layer content's effective visibility at the specified scale. Returns the effective layer content visibility. This effective visibility takes care of the effective visibility of the parents at the specified scale. Will return false if an error occurs.