Yes, it is possible to update tiles in a Tile Service hosted on ArcGIS Online. A new Hosted Tile Service can be published with the updated tiles and then existing web maps that use the original Tile Service must be updated to the new service. However, in some cases users may want to update an existing Hosted Tile Service without having to republish the entire dataset or having to replace services in existing web maps. This can be accomplished with the workflows described below.
Tiles in an existing Hosted Tile Service can be updated using one of the following methods:
Overwrite the existing Tile Service through publishing a map in ArcMap using Share As > Service. When overwriting a service, the existing map tile item is deleted from ArcGIS Online and a new item is created with the same name. The new item is created in the root folder and the item is assigned a new ID. Sharing must be reconfigure and, if necessary, move the item back to the folder it was in before republishing.
Methods 2 and 3 discuss updating the tiles in the existing Tile Service, rather than republishing all the tiles.
Note: This workflow requires that an accompanying Tile Package or Service Definition to be present with the Tile Service in My Content.
Note: This method consumes credits when performing the overwrite as the updated tiles are generated in ArcGIS Online.
Update the existing Tile Service through ArcMap using the Manage Map Server Cache Tiles tool. This tool can be used to create new tiles, replace missing tiles, overwrite outdated tiles, and delete tiles.
Note: This workflow requires that the original Tile Service have been created through publishing a Hosted Feature Service in My Content. This workflow is not expected to update tiles when the Tile Service has been published directly from ArcMap or published from a Tile Package.
Note: This method consumes credits when performing the update as the updated tiles are generated in ArcGIS Online.
Create and use a tile package to update particular levels of display using the REST endpoint of the Hosted Tile Service and the Import Tiles operation.
Users may be prompted to log in again with ArcGIS Online credentials.
Note: This method does not consume credits as the new tiles are generated in ArcMap when the Tile Package is created.