What Is the REST URL to Get the Layers of a Web Map?

[JacobAychman]

I've been combing the ArcGIS REST API Resource Index for a few days now, and I still can't seem to figure out how or where I would query the available layers for a webmap, given the map id, name, or any other resource to identify it. I did find a page (Dynamically create layer list | ArcGIS API for JavaScript) detailing how to make a document able to select layers for a "stock map," and while I would eventually like to be able to select visible layers when exporting a webmap, at present I just need the REST URL for listing the layers.

Thanks in advance for any assistance.

[AlexanderNohe1]

Hi Jacob Aychman‌,

I am not sure if this functionality you are looking for exists.  By taking a look at the ArcGIS REST API, I see no indication that webmaps have their own REST endpoint.  One method that would work at gathering the layers for a webmap would be to use the buildlayerlist function found in the link that you provided.  On the other hand, if you are looking at a servers REST Endpoint for a MapServer item, you can parse the JSON for the MapServer item.

<SERVER_URL>/MapServer/layers?f=pjson‌

Does this help?

[AlexanderNohe1 · Accepted solution]

Hi Jacob Aychman‌,

I spoke too soon.

You can use the following REST URL:

http://<ORG_SHORTURL>.maps.arcgis.com/sharing/rest/content/items/<WEBMAP_ID>/data?f=pjson&token=<TOKEN>‌

This will have a json output which you can then parse for the operational layers and their definitions.

An example of this output can be found attached.

[JacobAychman]

Thanks, Alexander Nohe‌!

I'll give this a shot. Do you know if there's any way to obtain the Webmap ID via REST? Thus far, I've just been copying it out of the map viewer's URL.

[AlexanderNohe1]

Jacob Aychman‌,

You would want to do something like this on a per user basis:

http://<ORG_SHORT_URL>.maps.arcgis.com/sharing/rest/content/users/<USERNAME>?f=pjson&token=‌<TOKEN>

I hope this helps!