topic Re: Simple way to export a Layer List for a Web Map to Text in ArcGIS Online Questions

Simple way to export a Layer List for a Web Map to Text

BrianO_keefe — Thu, 25 May 2017 16:47:04 GMT

Is there a simple way to export the layer list from a web map (built with WAB) to a text file?

Re: Simple way to export a Layer List for a Web Map to Text

Lake_Worth_BeachAdmin — Mon, 05 Jun 2017 12:15:52 GMT

open the feature service in arcmap (in catalog you will see an option for feature services, then use arcpy to list the layers

Re: Simple way to export a Layer List for a Web Map to Text

LindsyHales_Bentley — Thu, 09 Jul 2020 14:27:35 GMT

Is there a way to do this for all services at once? Thanks!

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Thu, 09 Jul 2020 14:53:00 GMT

Do you have access to ArcGIS Pro or ArcGIS Notebook (in AGOL or enterprise)? If so this can be done using the ArcGIS API for Python pretty easily!

Re: Simple way to export a Layer List for a Web Map to Text

LindsyHales_Bentley — Thu, 09 Jul 2020 14:55:08 GMT

Yes, I have both of those. Any help is appreciated!! Thank you!

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Sun, 12 Dec 2021 02:02:32 GMT

Easy then!

from arcgis.gis import GIS
from arcgis.mapping import WebMap
gis = GIS('pro')# if running this from Notebook for ArcGIS in AGOL/Enterprise, replace this line with gis = GIS('home')
wmItemId = "" #put the id of the webmap in here
wmItem = gis.content.get(wmItemId)
wm = WebMap(wmItem)
for lyr in wm.layers:
    print(lyr.title)‍‍‍‍‍‍‍‍

I wrote that to be run from the Python window in Pro, but see my note in line 3 about using it in ArcGIS Notebook. Just put the ID of the web map item into line 4 and it should print out all the layers for the given webmap.

Re: Simple way to export a Layer List for a Web Map to Text

LindsyHales_Bentley — Thu, 09 Jul 2020 15:07:17 GMT

Thank you so much!!

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Thu, 09 Jul 2020 15:08:58 GMT

Glad to help out!

Re: Simple way to export a Layer List for a Web Map to Text

Kayden75 — Wed, 06 Apr 2022 20:20:35 GMT

Hi,

I took your script and tried adding in a lyr.url to get the url of the layers and it worked but sometimes it comes up with an exception saying "layer" instance has no attribute 'url' and I was wondering if you know what I can do to put an exception in there. Thanks!

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Mon, 18 Jul 2022 00:28:46 GMT

Hi Kayden, sorry for the delay, didn't see your message until now. I've had this issue in the past with vector tile layers (possibly from the basemap?) as they have an attribute called "styleUrl" instead of "url", which you could handle with some code like this:

if layer['layerType'] == "VectorTileLayer": print(layer.styleUrl) else: print(layer.url)

Re: Simple way to export a Layer List for a Web Map to Text

anonymous55 — Mon, 05 Dec 2022 14:47:21 GMT

Hello @JoshuaSharp-Heward
I am getting this error when I am using your code on AGOL notebook

from arcgis.gis import GIS from arcgis.mapping import WebMap gis = GIS('home')# if running this from Notebook for ArcGIS in AGOL/Enterprise, replace this line with gis = GIS('home') wmItemId = "myid" #put the id of the webmap in here wmItem = gis.content.get(wmItemId) wm = WebMap(wmItem) for lyr in wm.layers: print(lyr.title)‍‍‍‍‍‍‍‍

Error:

Input In [8] print(lyr.title)‍‍‍‍‍‍‍‍ ^ SyntaxError: invalid non-printable character U+200D

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Tue, 06 Dec 2022 19:55:42 GMT

Hi,

It looks to me like there was an issue with the copy pasting of the code - try deleting the whole line "print(lyr.title)" and re-typing it manually, and let me know if that resolves it!

Re: Simple way to export a Layer List for a Web Map to Text

anonymous55 — Mon, 12 Dec 2022 21:02:01 GMT

Thanks @JoshuaSharp-Heward

sorry for late respond. I manually re-type it and it is working. Just one more question
Do you know how can I modifie your code to get URL of each layers in webmap

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Mon, 12 Dec 2022 21:24:17 GMT

No worries, glad to hear it's working now!

You can replace "lyr.title" with "lyr.url" to print out the url of a layer. Best to do it in an if statement like so:

if hasattr(lyr, "url"): print(lyr.url)

as there are some layer types that don't have "url" attribute (for example, vector tile services have a 'styleUrl' instead) and if you don't have that step then the code will fail when it hits one of those layers. Also note that this simple bit of code above to print out the layers in a map doesn't handle group layers, I'd have to fetch another couple lines of code to deal with that if you need that functionality.

Re: Simple way to export a Layer List for a Web Map to Text

anonymous55 — Tue, 20 Dec 2022 19:06:04 GMT

@JoshuaSharp-Heward Thanks this is pretty good.
sorry to bother you with this. Do you know how can I run this for my whole arcgis online webmaps? Instead of manually copy paste ItemId for each webmap.

Thanks again for your help

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Wed, 21 Dec 2022 03:14:17 GMT

Hi,

You can loop through all of the webmaps in your arcgis online by using the following code:

web_maps = gis.content.search(query="", item_type="Web Map", max_items=10000) for item in web_maps: wm = WebMap(item)

Then use the rest of the code that you have been using! If you have any issues you can refer back to this code in github that I put together which searches through web maps for a particular web service https://github.com/joshsharpheward/gis-administration/blob/master/search_webmaps_for_services.py

Cheers,

Josh

Re: Simple way to export a Layer List for a Web Map to Text

TukFull — Tue, 21 May 2024 21:22:12 GMT

Would it be a hassle to provide an example that pulls group layers as well?

Re: Simple way to export a Layer List for a Web Map to Text

JoshuaSharp-Heward — Wed, 22 May 2024 05:28:09 GMT

Hi,

Do you mean code that can look within group layers to pull out the layers within? If so, I've got a function that can handle those as well! Works for any number of levels of grouping.

def unnestlayers(layer): wmlayers = [] for lyr in layer.layers: try: if hasattr(lyr, "layers"): wmlayers += unnestlayers(lyr) else: wmlayers.append(lyr) except: print("Something went wrong") return wmlayers

Then just input the webmap and it should spit out a list of the actual layers

layers = unnestlayers(web_map)

Re: Simple way to export a Layer List for a Web Map to Text

TukFull — Wed, 22 May 2024 16:08:36 GMT

This worked great, thank you!