List all feature layers from portal

Question

Hi, we'd like to list all available feature layers that are available in ArcGIS portal. Our assumption was that there exists something like:

val portal = Portal(PORTAL_URL, Portal.Connection.Anonymous)
portal.fetchFeatureLayers()
...

But none of the "fetch..." methods returns the feature layer we created in ArcGIS portal.

Edit: After digging a bit more into the issue, we found out that none of the (vector) basemaps from our portal are fetched. Instead we receive items with names such as:

- 0330_Dark_Gray_Canvas_Title

- 0310_Terrain_Labels_Title

- 0120_Imagery_Hybrid_Title

- ...

Do you have any expaination why our basemaps are not listed by the fetch* command?

Thanks in advance

Erick_1 · Accepted Answer

Hello @padmalcom ,

We provide the Portal.findItems(PortalQueryParameters) API to find items of a specific type.

In your PortalQueryParameters, you can specify the Portal item type you wish to search for.

For example, If I want to search for all Feature Service/Feature Layer owned by the Portal's user then you could do something like this:

val portalQueryParameters = PortalQueryParameters(query = "type:Feature Service AND owner:${portal.user?.username}", limit = 100) 
val portalQueryResultSet = portal.findItems(portalQueryParameters).getOrNull()

After that, all the desired items should be in the PortalQueryResultSet returned.

Here's a list of the supported types: https://developers.arcgis.com/rest/users-groups-and-items/items-and-item-types.htm

You can find more about the search query here: https://developers.arcgis.com/rest/users-groups-and-items/search-reference.htm

Regarding your Basemap question,

I assume you're referring to the following APIs:

Portal.fetchBasemaps()
----
Portal.fetchVectorBasemaps()

After getting the result, you have to load each Basemap in order to inspect the layers.

Let me know if this resolves your question.