Unable to manipulate and update json of web map

MariamJamilah — Thu, 12 Aug 2021 11:31:08 GMT

Hello,

I am trying to remove a set of layers from a web map and add them back later. Since the layers consist of a mix of feature services and image services, I feel the easiest way to do this would be by manipulation the json of the web map. When I use AGOL assisstant, I am able to achieve the above, however when I try to do the same using ArcGIS Python API, it does not work.

I am using the code below to achieve the above, though post executing the update command I get 'True', the layers are not removed from the web map. I have also attached screenshot for reference

web_map = source.content.get(itemid) data = web_map.get_data() rem_j = [] for i in data['operationalLayers']: if i['url'].find('mygishub') == -1: rem_j.append(i) data['operationalLayers'].remove(i) web_map.update(item_properties=data)

I have also tried to achieve the same by using the WebMap object, but it still does not work. Have attached screenshot and code for reference.

web_map = source.content.get(itemid) web_map_obj = WebMap(web_map) rem_j = [] for i in web_map_obj.layers: if i['url'].find('mygishub') == -1: rem_j.append(i) web_map_obj.layers.remove(i) web_map_obj.update()

Note: I have not used the add_layer and remove_layer methods here. I am aware that the remove layer method accepts a layer object (i.e., webmap.layers[id]), this approach works for removing layers but when it comes to adding a mixture of feature services and image services as layers using their urls, I have to find the type of service and then create a FeatureLayer or ImageryLayer object accordingly for each url and finally add them to the webmap, which I feel is not very efficient as I have a large number of layers.

Re: Unable to manipulate and update json of web map

GaetanPRU — Thu, 12 Aug 2021 13:11:46 GMT

Maybe the right methode it is remove_layer().

Otherwise, when I want update webmap properties with python, I work on json.

Eg. I use this code :

itemWebmap.update(item_properties={'text':new_data})

where new_data is my webmap properties json with new properties.

If it's OK, this request return TRUE.

You can find more informations here : https://developers.arcgis.com/python/sample-notebooks/using-and-updating-gis-content/

Re: Unable to manipulate and update json of web map

sofoo — Sun, 18 Dec 2022 10:15:41 GMT

You can use get_data to return the current json on an item, then edit the json and use update as shown above. Worked for me!

topic Unable to manipulate and update json of web map in ArcGIS API for Python Questions

Unable to manipulate and update json of web map

Re: Unable to manipulate and update json of web map

Re: Unable to manipulate and update json of web map