Create a web map from a JSON file using ArcGIS API for Python 2.4

Summary

Creating a web map with a script is usually preferred as the process can be automated for multiple web maps. These web maps can be created from a JSON file representation using the folder.add function in ArcGIS API for Python 2.4 by:

• reading the JSON file within the script, or
• defining the JSON description in the script.

Note:
Defining the JSON description is a longer process. However, it provides the ability to modify the JSON representation of the script.

Procedure

Create the web map from the JSON file by reading it using the json module

Note:
Upload the JSON file in the working directory of the notebook environment before running the script.

1. Import the necessary modules.

from arcgis.gis import GIS
from arcgis.map import Map
import json

2. Specify the login credentials.

#For ArcGIS Online
gis = GIS('https://arcgis.com', '<username>', '<password>')

#For Portal for ArcGIS
gis = GIS('https://<machine>.<domain>/<web adaptor name>/home', 'username', 'password', verify_cert=False)

print ('Connected')

3. Open the JSON file.

with open('/home/jupyter/test2.json') as json_data:
	data = json.load(json_data)

4. Create the new map.

item_properties_dict = {"type": "Web Map","title": "Test Map","tags": ["test","test1","test2"],"snippet":"This is a snippet", "text":data}

folder = gis.content.folders.get()
newmap = folder.add(item_properties = item_properties_dict)
newmap

The following shows the full script:

from arcgis.gis import GIS
from arcgis.map import Map
import json

#For ArcGIS Online
gis = GIS('https://arcgis.com', '<username>', '<password>')

print ('Connected')

with open('/home/jupyter/test2.json') as json_data:
	data = json.load(json_data)

item_properties_dict = {"type": "Web Map","title": "Test Map","tags": ["test","test1","test2"],"snippet":"This is a snippet", "text":data}

folder = gis.content.folders.get()
newmap = folder.add(item_properties = item_properties_dict)
newmap

Create the web map by defining the JSON description in the script

1. Follow steps 1 and 2 from the method above.
2. Define the dictionary containing the JSON used to create the web map.

data = {
	"operationalLayers": [{
			"id": "layer_2382",
			"layerType": "ArcGISMapServiceLayer",
			"url": "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer",
			"visibility": True,
			"opacity": 1,
			"title": "Census Data",
			"layers": [{
					"id": 0,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 0
						}
					},
					"name": "Census Block Points",
					"minScale": 99999.99998945338,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}, {
					"id": 1,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 1
						},
						"drawingInfo": {
							"renderer": {
								"type": "simple",
								"label": "",
								"description": "",
								"symbol": {
									"color": [0, 0, 0, 0],
									"outline": {
										"color": [230, 230, 0, 255],
										"width": 0.39975000000000005,
										"type": "esriSLS",
										"style": "esriSLSSolid"
									},
									"type": "esriSFS",
									"style": "esriSFSSolid"
								}
							}
						}
					},
					"name": "Census Block Group",
					"minScale": 1000000,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}, {
					"id": 2,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 2
						},
						"drawingInfo": {
							"renderer": {
								"type": "simple",
								"label": "",
								"description": "",
								"symbol": {
									"color": [0, 0, 0, 0],
									"outline": {
										"color": [230, 230, 0, 255],
										"width": 0.5625,
										"type": "esriSLS",
										"style": "esriSLSSolid"
									},
									"type": "esriSFS",
									"style": "esriSFSSolid"
								}
							}
						}
					},
					"name": "Detailed Counties",
					"minScale": 0,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}, {
					"id": 3,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 3
						},
						"drawingInfo": {
							"renderer": {
								"type": "simple",
								"label": "",
								"description": "",
								"symbol": {
									"color": [0, 0, 0, 0],
									"outline": {
										"color": [230, 230, 0, 255],
										"width": 2,
										"type": "esriSLS",
										"style": "esriSLSSolid"
									},
									"type": "esriSFS",
									"style": "esriSFSSolid"
								}
							}
						}
					},
					"name": "states",
					"minScale": 0,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}
			]
		}
	],
	"baseMap": {
		"baseMapLayers": [{
				"id": "labels",
				"layerType": "ArcGISTiledMapServiceLayer",
				"url": "https://services.arcgisonline.com/arcgis/rest/services/Canvas/World_Dark_Gray_Base/MapServer",
				"visibility": True,
				"opacity": 1,
				"title": "World_Dark_Gray_Base"
			}, {
				"id": "base",
				"layerType": "ArcGISTiledMapServiceLayer",
				"url": "https://services.arcgisonline.com/arcgis/rest/services/Canvas/World_Dark_Gray_Reference/MapServer",
				"visibility": True,
				"opacity": 1,
				"title": "World_Dark_Gray_Reference"
			}
		],
		"title": "Basemap"
	},
	"spatialReference": {
		"wkid": 102100,
		"latestWkid": 3857
	},
	"authoringApp": "WebMapViewer",
	"authoringAppVersion": "10.6.1",
	"version": "2.34"
}

3. Create the new map.

item_properties_dict = {"type": "Web Map","title": "Test Map","tags": ["test","test1","test2"],"snippet":"This is a snippet", "text":data}

folder = gis.content.folders.get()
newmap = folder.add(item_properties = item_properties_dict)
newmap

The following shows the full script:

from arcgis.gis import GIS
from arcgis.map import Map
import json

#For Portal for ArcGIS
gis = GIS('https://<machine>.<domain>/<web adaptor name>/home', 'username', 'password', verify_cert=False)

print ('Connected')

data = {
	"operationalLayers": [{
			"id": "layer_2382",
			"layerType": "ArcGISMapServiceLayer",
			"url": "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer",
			"visibility": True,
			"opacity": 1,
			"title": "Census Data",
			"layers": [{
					"id": 0,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 0
						}
					},
					"name": "Census Block Points",
					"minScale": 99999.99998945338,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}, {
					"id": 1,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 1
						},
						"drawingInfo": {
							"renderer": {
								"type": "simple",
								"label": "",
								"description": "",
								"symbol": {
									"color": [0, 0, 0, 0],
									"outline": {
										"color": [230, 230, 0, 255],
										"width": 0.39975000000000005,
										"type": "esriSLS",
										"style": "esriSLSSolid"
									},
									"type": "esriSFS",
									"style": "esriSFSSolid"
								}
							}
						}
					},
					"name": "Census Block Group",
					"minScale": 1000000,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}, {
					"id": 2,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 2
						},
						"drawingInfo": {
							"renderer": {
								"type": "simple",
								"label": "",
								"description": "",
								"symbol": {
									"color": [0, 0, 0, 0],
									"outline": {
										"color": [230, 230, 0, 255],
										"width": 0.5625,
										"type": "esriSLS",
										"style": "esriSLSSolid"
									},
									"type": "esriSFS",
									"style": "esriSFSSolid"
								}
							}
						}
					},
					"name": "Detailed Counties",
					"minScale": 0,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}, {
					"id": 3,
					"layerDefinition": {
						"source": {
							"type": "mapLayer",
							"mapLayerId": 3
						},
						"drawingInfo": {
							"renderer": {
								"type": "simple",
								"label": "",
								"description": "",
								"symbol": {
									"color": [0, 0, 0, 0],
									"outline": {
										"color": [230, 230, 0, 255],
										"width": 2,
										"type": "esriSLS",
										"style": "esriSLSSolid"
									},
									"type": "esriSFS",
									"style": "esriSFSSolid"
								}
							}
						}
					},
					"name": "states",
					"minScale": 0,
					"maxScale": 0,
					"parentLayerId": -1,
					"defaultVisibility": True
				}
			]
		}
	],
	"baseMap": {
		"baseMapLayers": [{
				"id": "labels",
				"layerType": "ArcGISTiledMapServiceLayer",
				"url": "https://services.arcgisonline.com/arcgis/rest/services/Canvas/World_Dark_Gray_Base/MapServer",
				"visibility": True,
				"opacity": 1,
				"title": "World_Dark_Gray_Base"
			}, {
				"id": "base",
				"layerType": "ArcGISTiledMapServiceLayer",
				"url": "https://services.arcgisonline.com/arcgis/rest/services/Canvas/World_Dark_Gray_Reference/MapServer",
				"visibility": True,
				"opacity": 1,
				"title": "World_Dark_Gray_Reference"
			}
		],
		"title": "Basemap"
	},
	"spatialReference": {
		"wkid": 102100,
		"latestWkid": 3857
	},
	"authoringApp": "WebMapViewer",
	"authoringAppVersion": "10.6.1",
	"version": "2.34"
}

item_properties_dict = {"type": "Web Map","title": "Test Map","tags": ["test","test1","test2"],"snippet":"This is a snippet", "text":data}

folder = gis.content.folders.get()
newmap = folder.add(item_properties = item_properties_dict)
newmap  

The image below shows the newly created web map.