topic Re: Can't load Web Maps or Feature Layers in ArcGIS API for Python Questions

Can't load Web Maps or Feature Layers

torbenal — Wed, 15 Jan 2025 14:23:03 GMT

Hello!

I'm working with the arcgis API for Python, but I'm having some serious issues getting it to work as expected.

I'm using portal-tier authentication.

First I try loading a Web Map directly. That gives me the following error.

from arcgis.gis import GIS portal = GIS(url="https://maps.xyz.com/portal", username="xyz", password="xyz") web_map_id = 'xyz' web_map = portal.content.get(web_map_id) portal.map(web_map) ============ ValidationError: 3680 validation errors for Webmap operationalLayers.5.AnnotationLayerArcGISAnnotationLayer.layerType Input should be 'ArcGISAnnotationLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.CatalogLayerCatalogLayer.layerType Input should be 'CatalogLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.CSVLayerCSV.layerType Input should be 'CSV' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.DimensionLayerArcGISDimensionLayer.layerType ... Field required [type=missing, input_value={'id': 911, 'layerDefinit...efaultVisibility': True}, input_type=dict] For further information visit https://errors.pydantic.dev/2.4/v/missing operationalLayers.5.LinkChartLayerLinkChartLayer.layerType Input should be 'LinkChartLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error

Subsequently, I tried starting with an empty map, and loading Feature Layers directly

from arcgis.layers import Service layers = Service( "https://xyz.com/arcgis/rest/services/xyz/xyz/FeatureServer" ) m = portal.map() m.basemap.basemap = 'satellite' for lyr in layers.layers: m.content.add(lyr) m.center = [xyz, xyz] m.zoom = 30

That just outputs the basemap, with no layers to be seen.

Printing `layers` gives the following

Is this maybe a permission issue? I have no other ideas left. I've followed the guides in the documentation.
Also, this is all on version 2.4.0

Cheers.

Re: Can't load Web Maps or Feature Layers

Clubdebambos — Wed, 15 Jan 2025 15:07:41 GMT

Hi @torbenal.,

.map() is for use with Notebooks. If you are using a script for version 2.4.0 try the following...

from arcgis.gis import GIS from arcgis.map import Map ## access portal portal = GIS(url="URL", username="UserName", password="Password") ## the WebMap Item ID web_map_id = "WM_ITEM_ID" ## get the WebMap as an Item Object wm_item = portal.content.get(web_map_id) ## create a WMap object map_obj = Map(wm_item) ## access elements of he Map obejct print(map_obj) print(map_obj.extent) print(map_obj.basemap.basemap) # get basemap from BasemapManager ## add the layers from a Feature Service to the Map fs_item = portal.content.get("FS_ITEMN_ID") for layer in fs_item.layers: map_obj.content.add(layer) ## update the Map object map_obj.update()

Some of the Map properties/methods are only available with Notebooks such as center and zoom.

If using Notebooks you can perform the following.

## Cell 1 from arcgis.gis import GIS from arcgis.map import Map ## Cell 2: access portal portal = GIS(url="URL", username="UserName", password="Password") ## Cell 3: Get the Map Object web_map_id = "WM_ITEM_ID" wm_item = portal.content.get(web_map_id) map_obj = Map(wm_item) map_obj ## your Map will appear ## CELL 4: Update Map properties map.zoom = 30

Hope that helps.

Glen

Re: Can't load Web Maps or Feature Layers

torbenal — Wed, 15 Jan 2025 15:57:52 GMT

Hi @Clubdebambos

Thanks for your reply.

I am using a Notebook. The main issue is I don't even get past calling the `Map()` initializer, due to the validation errors in my post.

Re: Can't load Web Maps or Feature Layers

Clubdebambos — Wed, 15 Jan 2025 16:19:20 GMT

Hi @torbenal,

1. You need to first import the Map class

from arcgis.map import Map

2. Then you get your WebMap as an Item object.

wm_item = portal.content.get("WM_ITEM_ID")

3. Next you create a Map object from the Item.

map_obj = Map(wm_item)

Your original post does not have number 1 and 3 above in place. You are trying to use the WebMap item as a parameter to the map() method which it won't accept. Check the map() method documentation here. If you want to use a WebMap from your Portal follow the above and then you can simply call map_obj to display your map in the Notebook. Once displayed, you can add layers and alter the zoom.

map() is not the same as Map(). map() is a method from the GIS class. Map() is its own class and creates a Map object with it's own properties and methods. When you create a Map() object in Notebook it is essentially a prepopulated map(). The map() documentation has a link to the Map() class to use properties such as zoom and center.

Re: Can't load Web Maps or Feature Layers

torbenal — Wed, 15 Jan 2025 16:29:21 GMT

Hi @Clubdebambos

Unfortunately, does not fix my issue. The following is from my Jupyter Notebook.

from arcgis.map import Map web_map_id = 'xyz' wm_item = portal.content.get(web_map_id) map_obj = Map(wm_item) map_obj --------------------------------------------------------------------------- ValidationError Traceback (most recent call last) Cell In[39], line 4 2 web_map_id = '02280e1953a743a8b97f65782ca1512b' 3 wm_item = portal.content.get(web_map_id) ----> 4 map_obj = Map(wm_item) 5 map_obj File ~/Documents/fluxense/flowzone/.venv_gis/lib/python3.10/site-packages/arcgis/map/map_widget.py:254, in Map.__init__(self, location, item, gis, **kwargs) 250 self._helper._setup_gis_properties(gis) 252 # Set up the map that will be used 253 # either existing or new instance --> 254 self._setup_webmap_properties(item) 256 # Assign the definition to helper class. This is the pydantic dataclass. 257 self._helper._set_widget_definition(self._webmap) File ~/Documents/fluxense/flowzone/.venv_gis/lib/python3.10/site-packages/arcgis/map/map_widget.py:402, in Map._setup_webmap_properties(self, item) 399 data = self._fix_basemap_data(data) 401 # Use pydantic dataclass from webmap_spec --> 402 self._webmap = ws.Webmap(**data) 404 # For bookmarks class 405 if self._webmap.bookmarks is None: File ~/Documents/fluxense/flowzone/.venv_gis/lib/python3.10/site-packages/pydantic/main.py:164, in BaseModel.__init__(__pydantic_self__, **data) 162 # `__tracebackhide__` tells pytest and some other tools to omit this function from tracebacks 163 __tracebackhide__ = True --> 164 __pydantic_self__.__pydantic_validator__.validate_python(data, self_instance=__pydantic_self__) ValidationError: 3680 validation errors for Webmap operationalLayers.5.AnnotationLayerArcGISAnnotationLayer.layerType Input should be 'ArcGISAnnotationLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.CatalogLayerCatalogLayer.layerType Input should be 'CatalogLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.CSVLayerCSV.layerType Input should be 'CSV' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.DimensionLayerArcGISDimensionLayer.layerType Input should be 'ArcGISDimensionLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.FeatureLayerArcGISFeatureLayer.layerType Input should be 'ArcGISFeatureLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error operationalLayers.5.GeoJSONLayerGeoJSON.layerType ... Field required [type=missing, input_value={'id': 911, 'layerDefinit...efaultVisibility': True}, input_type=dict] For further information visit https://errors.pydantic.dev/2.4/v/missing operationalLayers.5.LinkChartLayerLinkChartLayer.layerType Input should be 'LinkChartLayer' [type=literal_error, input_value='ArcGISMapServiceLayer', input_type=str] For further information visit https://errors.pydantic.dev/2.4/v/literal_error

Re: Can't load Web Maps or Feature Layers

Clubdebambos — Wed, 15 Jan 2025 16:41:19 GMT

😢😭

I am unable to reproduce. In-fact, I tested your original code and could get it to work. If you create another WebMap manually and just add one layer and re-attempt does it work? Just to see if it is something wrong with the WebMap itself or the functionality.

Re: Can't load Web Maps or Feature Layers

vijaybadugu — Mon, 17 Feb 2025 21:52:18 GMT

I am also encountering same issue at Map(webmapitem) for all webmaps. it was working fine before .