topic Re: reorder webmap layers with Python? in ArcGIS API for Python Questions

reorder webmap layers with Python?

davedoesgis — Wed, 08 Apr 2020 00:17:10 GMT

I'd like to re-order webmap layers with Python. I'm using the arcgis package (the ArcGIS API for Python) to add a layer, but the newest layer just goes to the top of the layer list (table of content), which may not be where I want it. How do I re-order it after I add it?

I'd also be interested to know if the WebMap.add_layer() function can just put the layer in the right order in the first place.

thanks!

Re: reorder webmap layers with Python?

davedoesgis — Mon, 13 Apr 2020 22:34:54 GMT

Anyone at Esri following the forums?

Re: reorder webmap layers with Python?

ikatinas — Tue, 17 Nov 2020 04:59:55 GMT

You can change the layers order by changing the order of WebMap object's definition['operationalLayers'] list.

e.g. to switch the order between 1st and last having 6 layers:

wm = WebMap(wm_item) tempLayerDefinition = wm.definition['operationalLayers'][5] wm.definition['operationalLayers'][5] = wm.definition['operationalLayers'][0] wm.definition['operationalLayers'][0] = tempLayerDefinition wm.update()

Re: reorder webmap layers with Python?

PaulHallett1305 — Tue, 25 May 2021 17:09:08 GMT

I can't get this to work in anyway shape or form?

web_map = gis.content.get("1852725785754747") wm = WebMap(web_map) tmplyrdef = wm.definition.operationalLayers[15] wm.definition.operationalLayers[15] = wm.definition.operationalLayers[0] wm.definition.operationalLayers[0] = tmplyrdef wm.update() wm

In the absence of doubt, I also tried it this way

web_map = gis.content.get("572727827257578547") wm = WebMap(web_map) print(wm.definition.spatialReference) print(wm.definition['operationalLayers'][15]) tempLayerDefinition = wm.definition['operationalLayers'][15] wm.definition['operationalLayers'][15] = wm.definition['operationalLayers'][0] wm.definition['operationalLayers'][0] = tempLayerDefinition wm.update(item_properties=wip) wm

Re: reorder webmap layers with Python?

Clubdebambos — Fri, 28 May 2021 14:00:51 GMT

This works. You need to be aware that the indexing starts at the bottom layer and not the top. The below will switch the bottom layer with the second last layer.

from arcgis import GIS conn = GIS("home") item = conn.content.get("wm_item_id") item_data = item.get_data() tmp = item_data['operationalLayers'][1] item_data['operationalLayers'][1] = item_data['operationalLayers'][0] item_data['operationalLayers'][0] = tmp item_properties = {"text":item_data} item.update(item_properties=item_properties)

Re: reorder webmap layers with Python?

Clubdebambos — Mon, 31 May 2021 07:59:56 GMT

Just taking this a bit further, I have tens of maps that will eventually be over a couple of hundred +, where I want standard layers in the same order, users have potential to reorder and some older maps do not fit the standard order but the layer naming does. Below is the base script created, I can put the list of webmap ids in a file and iterate through when I want or schedule for intermittent quality control runs. The below is for one run on a single webmap.

from arcgis import GIS ## dictionary ## key: standard layer name ## value: list, index of layer (from bottom up), the definition will be added to this list. lyr_order_dict = { "standard_lyr_name_1" : [0], "standard_lyr_name_2" : [1], "standard_lyr_name_3" : [2], "standard_lyr_name_4" : [3], "standard_lyr_name_5" : [4], "standard_lyr_name_6" : [5], "standard_lyr_name_7" : [6], "standard_lyr_name_8" : [7], "standard_lyr_name_9" : [8], "standard_lyr_name_10" : [9], "standard_lyr_name_11" : [10], "standard_lyr_name_12" : [11], "standard_lyr_name_13" : [12], "standard_lyr_name_14" : [13] } conn = GIS("home") item = conn.content.get("wm_id") item_data = item.get_data() ## iterate through the layers for index, i in enumerate(item_data["operationalLayers"]): ## get the name of the layer title = item_data["operationalLayers"][index]["title"] ## add the definition to the entry in the dictionary if title in lyr_order_dict: lyr_order_dict[title] = lyr_order_dict[title] + [item_data['operationalLayers'][index]] ## iterate through the dictionary and reorder the layers for key, value in lyr_order_dict.items(): item_data['operationalLayers'][value[0]] = value[1] item_properties = {"text":item_data} item.update(item_properties=item_properties)

Re: reorder webmap layers with Python?

PaulHallett1305 — Mon, 31 May 2021 18:00:30 GMT

I have tested it, quite a lot, and it doesn't move any of the layers at all.

I'll work on it again tomorrow, but implementing this, as above, didn't work for me.

Re: reorder webmap layers with Python?

PaulHallett1305 — Mon, 31 May 2021 18:02:05 GMT

Thanks, will check if this works for me tomorrow; a dict was going to be my next stab.

Re: reorder webmap layers with Python?

Clubdebambos — Tue, 01 Jun 2021 07:02:53 GMT

That's interesting, I've ran this a few times now and works perfectly, I wonder what the difference is?

Re: reorder webmap layers with Python?

PaulHallett1305 — Wed, 30 Jun 2021 18:04:08 GMT

Hi there,

Sorry for the late reply, but I have been ill.

This is the function I have, inside a utilities class and I get list index errors, and when I checkl the contents, it's not being populated.

def reorder_layers(self): print("*********Re-ordering layers********** \n\n") ## dictionary ## key: standard layer name ## value: list, index of layer (from bottom up), the definition will be added to this list. lyr_order_dict = { "Open Work Orders" : [0], "Pressure Control Valves" : [1], "Others Repairs" : [2], "Dry Holes" : [3], "Open CSL" : [4], "GISID RAG Status" : [5], "Secondary Pipe Status" : [6], "DMA" : [7], "NMA" : [8], "FMZ" : [9], "Network Operation Valve" : [10], "Fire Hydrant" : [11], "Hot Spot" : [12], "Property Info" : [13] } web_map = self.gis.content.get(self.web_map_id) item_data = web_map.get_data() ## iterate through the layers for index, i in enumerate(item_data["operationalLayers"]): ## get the name of the layer title = item_data["operationalLayers"][index]["title"] ## add the definition to the entry in the dictionary if title in lyr_order_dict: print(f"{lyr_order_dict[title]} \n") lyr_order_dict[title] = lyr_order_dict[title] + [item_data['operationalLayers'][index]] print(f"{lyr_order_dict[title]} \n") print(f"{item_data['operationalLayers'][index]} \n") ## iterate through the dictionary and reorder the layers for key, value in lyr_order_dict.items(): item_data['operationalLayers'][value[0]] = value[1] item_properties = {"text":item_data} self.wm.update(item_properties=item_properties)

This gives me an indexError: list index out of range, which on investigating, the data in there isn't good.

IndexError: list index out of range --------------------------------------------------------------------------- IndexError Traceback (most recent call last) <command-2193284686337018> in <module> 42 43 agsutil.get_feature_layer_size() ---> 44 agsutil.reorder_layers() 45 agsutil is None 46 print("Finished") <command-2193284686336187> in reorder_layers(self) 147 ## iterate through the dictionary and reorder the layers 148 for key, value in lyr_order_dict.items(): --> 149 item_data['operationalLayers'][value[0]] = value[1]

Re: reorder webmap layers with Python?

LanceKirby2 — Mon, 28 Jun 2021 00:24:24 GMT

It would be great if esri could way in here.

Re: reorder webmap layers with Python?

Clubdebambos — Wed, 30 Jun 2021 14:14:50 GMT

@PaulHallett1305 you have "GISIS RAG Status" twice in your dictionary and set as [5] and [6], layer names will need to be unique for this to work, otherwise one entry gets removed from the dictionary because of the duplicate key.

Re: reorder webmap layers with Python?

PaulHallett1305 — Wed, 30 Jun 2021 14:58:36 GMT

Sorry that’s a typo.

##- Please type your reply above this line

Re: reorder webmap layers with Python?

PaulHallett1305 — Wed, 30 Jun 2021 18:04:39 GMT

I've edited it to be how it should be.

Re: reorder webmap layers with Python?

PaulHallett1305 — Mon, 05 Jul 2021 07:44:24 GMT

Well I finally got it working, and it wasn't Clubdebambos code that wasn't working, but my brain and I had named a layer slightly incorrectly (it had a trailing s), so your work is magic, super quick and does what it needs to do, right on the money.

Thanks so much for your help, you went over and beyond what I would have expected.

Great stuff

Re: reorder webmap layers with Python?

AustinDoezema — Mon, 23 Aug 2021 16:55:55 GMT

Hey, I was running into a similar issue when I noticed you are using item.update() rather than webmap.update(). Took me a while to notice that to reorder operational layers you need to update the item data not necessarily the webmap object. Do you know why this is? It's not very intuitive (to me at least) that you need to update the item and not the webmap. Both have similar update functions but they seem to be capable of different things. Anyway, thank you for posting this code. Cheers!

Re: reorder webmap layers with Python?

PaulHallett1305 — Mon, 23 Aug 2021 17:22:27 GMT

I think it's as you're updating an item within the webmap; it's not the web map per se.

Re: reorder webmap layers with Python?

AlderMaps — Thu, 30 Dec 2021 18:24:35 GMT

@Clubdebambos' example--getting the item data, updating it, then updating item w/item_properties--worked for me. Wrestled with trying to update the web map object for a while; had no luck there. Switched to item and it works. Much appreciated!

Re: reorder webmap layers with Python?

JoeGuziStarkCountyOH — Wed, 26 Jun 2024 23:02:09 GMT

Thank you for this post and discussion. It helped me create this Jupyter Notebook that prompts the user for a layer to replace, and a layer to replace it with, then it loops through all of the web maps the user has access to and replaces the layers. Check it out, I hope it helps...

ArcGIS Online Replace Layer in a Web Map