Displaying labels on points in Jupyter notebook widget map?

Question

Hi! I'm trying to get labels working in my Jupyter notebook map, and I've tried everything I can think of.

Here's my code:

from arcgis.geometry import Point
from arcgis.features import Feature, FeatureSet, FeatureCollection, FeatureLayer, FeatureLayerCollection
import arcgis.mapping
from ipywidgets import *

name_coords_matches_list = [('American Canyon', 38.1743, -122.2583)]

map_widget = gis.map("Napa County, California, USA")

point_features = []
for point_datum in name_coords_matches_list:
point_geometry = Point({"x": float(point_datum[2]), "y": float(point_datum[1]), "spatialReference": {"wkid": 4326}}) # Create a dict for the long/lat point
point_attributes = {"name": point_datum[0]} # Create a dict for the 'name' attribute
point_feature = Feature(geometry=point_geometry, attributes=point_attributes) # Create the feature
point_features.append(point_feature) # Add the feature to the point_features list

feature_set = FeatureSet(point_features) # Create the feature set of all point features

feature_collection = FeatureCollection.from_featureset(feature_set) # Create a feature collection from the feature set
feature_collection.properties["layers"][0]['layerDefinition']['drawingInfo']['renderer']['symbol']['color'] = [255, 255, 0, 127] # Make the point symbols translucent yellow
labeling_info = [{
"labelExpression": "[name]", "labelExpressionInfo": {"expression": "$feature.name"},
"maxScale": 0, "minScale": 0, "symbol": {
"color": [104, 104, 104, 255], "type": "esriTS",
"font": {"decoration": "none", "family": "Arial", "size": 8, "style": "normal", "weight": "bold"}
}
}]
feature_collection.properties["layers"][0]['layerDefinition']['drawingInfo']['labelingInfo'] = labeling_info # Add the labeling info
feature_collection.properties["layers"][0]['layerDefinition']['showLabels'] = True # Turn on labels

map_widget.add_layer(feature_collection) # Add the feature collection as a map layer

map_widget.layout=Layout(flex='1 1', padding='0px', height='1024px') # Change the dimensions of the map widget in Jupyter
map_widget # Display the map widget

The point is displayed, and its color is right, but it is missing the label 🤔

Here's the JSON from printing feature_collection.properties:

{
  "layers": [
    {
      "featureSet": {
        "geometryType": "esriGeometryPoint",
        "features": [
          {
            "geometry": {
              "x": -122.2583,
              "y": 38.1743,
              "spatialReference": {
                "wkid": 4326
              }
            },
            "attributes": {
              "name": "American Canyon",
              "OBJECTID": 1
            }
          },
		]
      },
      "layerDefinition": {
        "geometryType": "esriGeometryPoint",
        "fields": [
          {
            "name": "name",
            "alias": "name",
            "type": "esriFieldTypeString",
            "sqlType": "sqlTypeOther"
          },
          {
            "name": "OBJECTID",
            "type": "esriFieldTypeOID",
            "alias": "OBJECTID",
            "sqlType": "sqlTypeOther"
          }
        ],
        "spatialReference": {
          "wkid": 4326
        },
        "objectIdField": "OBJECTID",
        "type": "Feature Layer",
        "name": "a450db",
        "id": 0,
        "drawingInfo": {
          "renderer": {
            "type": "simple",
            "symbol": {
              "type": "esriSMS",
              "color": [
                255,
                255,
                0,
                127
              ],
              "angle": 0,
              "xoffset": 0,
              "yoffset": 0,
              "size": 12,
              "style": "esriSMSCircle",
              "outline": {
                "type": "esriSLS",
                "color": [
                  0,
                  0,
                  0,
                  255
                ],
                "width": 0.75,
                "style": "esriSLSSolid"
              }
            }
          },
          "labelingInfo": [
            {
              "labelExpression": "[name]",
              "labelExpressionInfo": {
                "expression": "$feature.name"
              },
              "maxScale": 0,
              "minScale": 0,
              "symbol": {
                "color": [
                  104,
                  104,
                  104,
                  255
                ],
                "type": "esriTS",
                "font": {
                  "decoration": "none",
                  "family": "Arial",
                  "size": 8,
                  "style": "normal",
                  "weight": "bold"
                }
              }
            }
          ]
        },
        "showLabels": true
      }
    }
  ]
}

Any help would be appreciated. Thanks in advance!

Brian

Clubdebambos · Answer

Hi Brian,

I got access to an earlier version and I could not get it to comply. Perhaps the update to 2.4.0 is the way to go. Just to note that 2.4.0 had some major updates (see here) and any workflows around WebMaps from previous versions will more than likely fail to work unless the scripts are upgraded to the latest.

All the best,

Glen

BBowers_napacounty · Answer

Thanks, Glen 👍 I tried both methods, and I must not have 2.4.0 yet because neither suggestion worked for me: --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) ~\AppData\Local\Temp\ipykernel_45388\2082314680.py in () 62 ] 63 ---> 64 map_widget.content.add(feature_collection) # Add the feature collection as a map layer 65 66 feature_collection.properties["layers"][-1]['layerDefinition']['drawingInfo']['labelingInfo'] = labeling_info AttributeError: 'MapView' object has no attribute 'content' --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) ~\AppData\Local\Temp\ipykernel_45388\1711682042.py in () 108 layer = map_widget.layers[0] 109 --> 110 map_widget.update_drawing_info( 111 layer = layer, 112 label_info = labeling_info, AttributeError: 'MapView' object has no attribute 'update_drawing_info' I found this page which describes the 2.4.0 techniques you're referencing. Looks like the ideal solution will be to upgrade, but I must get buy-in from my whole team before doing so.... In the meantime, I also came across a RendererManager description [link] that I think might cooperate with my version of the API for Python, but I don't have any clue how to get it to work. (I'm only just starting to learn all this stuff.) Any further help would be super appreciated! And thanks again!

Clubdebambos · Answer

Hi @BBowers_napacounty,

I was able to get this to work using the ArcGIS API for Python version 2.4.0 as per below.

from arcgis.gis import GIS
from arcgis.geometry import Point
from arcgis.features import Feature, FeatureSet, FeatureCollection, FeatureLayer, FeatureLayerCollection
import arcgis.map
from ipywidgets import *

gis = GIS("home")

name_coords_matches_list = [('American Canyon', 38.1743, -122.2583)]

map_widget = gis.map("Napa County, California, USA")

point_features = []
for point_datum in name_coords_matches_list:
    point_geometry = Point({"x": float(point_datum[2]), "y": float(point_datum[1]), "spatialReference": {"wkid": 4326}}) # Create a dict for the long/lat point
    point_attributes = {"name": point_datum[0]} # Create a dict for the 'name' attribute
    point_feature = Feature(geometry=point_geometry, attributes=point_attributes) # Create the feature
    point_features.append(point_feature) # Add the feature to the point_features list

feature_set = FeatureSet(point_features) # Create the feature set of all point features

feature_collection = FeatureCollection.from_featureset(feature_set) # Create a feature collection from the feature set
feature_collection.properties["layers"][0]['layerDefinition']['drawingInfo']['renderer']['symbol']['color'] = [255, 255, 0, 127] # Make the point symbols translucent yellow

labeling_info = [{
"labelExpression": "[name]", "labelExpressionInfo": {"expression": "$feature.name"},
"maxScale": 0, "minScale": 0, "symbol": {
"color": [104, 104, 104, 255], "type": "esriTS",
"font": {"decoration": "none", "family": "Arial", "size": 8, "style": "normal", "weight": "bold"}
}
}]

map_widget.content.add(feature_collection) # Add the feature collection as a map layer

options_dict = {
    "showLabels" : True,
    "layerDefinition" : {
        "drawingInfo" : {
            "labelingInfo" : labeling_info
        }
    }
}

map_widget.content.update_layer(
    index=0,
    options=options_dict
)

map_widget

If bound to using 2.3.0 or previous, you can try the following (I have no way of testing)

Follow the same as above with exception of the below...

map_widget.add_layer(feature_collection) # Add the feature collection as a map layer

layer = map_widget.layers[0]

map_widget.update_drawing_info(
    layer = layer,
    label_info = labeling_info,
    show_labels = True
)

map_widget

Please let us know if either of those work for you.

All the best,

Glen