ExportVectorTilesTask class final

A task to download vector tiles with their default style or with their associated custom style resources. Optionally, the task can download only the custom style resources.

Vector tiles are exported as a vector tile package (.vtpk) file, see VectorTileCache, from a vector tile service. The vector tile service must support the creation of an offline vector tile cache; specifically, it must enable the "exportTiles" operation.

Vector tiles contain vector representations of data that can be restyled for different purposes, such as day and night viewing. You can download default styling resources along with the vector tiles and custom style resources from ArcGIS Portal items that host vector tile layers. You can checked whether the vector tiles have custom styles using ExportVectorTilesTask.hasStyleResources. Custom styles are exported separately as an ItemResourceCache.

The export vector tiles task can be initialized with a URL using ExportVectorTilesTask.withUri. The URL can be to:

• A vector tile server that ends in "VectorTileServer" and is the rest end-point used to export vector tile packages. The vector tile service must be enabled for export or the task will fail to load.
• A portal item for a vector tile service or a vector tiled layer with a custom style applied.
• A vector basemap layer created using a BasemapStyle.

Alternatively a PortalItem, referencing a vector tile service or a custom style for a vector tiled layer, can be used with ExportVectorTilesTask.withPortalItem.

When using Esri provided vector basemaps that do not support exporting tiles (such as the ArcGIS streets basemap - see BasemapStyle.arcGISStreets), an alternative service that supports exporting tiles will be used instead.