item ID

An item ID is a unique identifier representing a single content item stored, managed, and accessed in a portal, such as a web map, hosted layer, or file. ArcGIS applications and APIs can use the item's URL or item ID to access the item from a portal. The item ID is included in the item page's URL. For example, the web map at https://www.arcgis.com/home/item.html?id=3d355e34cbd3405dbb3f031286f7b39b has an ID of 3d355e34cbd3405dbb3f031286f7b39b.