Setup My Geodatabase Network Dataset (ArcPy)

create_network_dataset.py

import arcpy
import os

def create_network_dataset(gdb_path):
    """
    Creates a network dataset in a file geodatabase based on an XML workspace document schema.

    Args:
        gdb_path (str): Path to the file geodatabase.
    """

    if not os.path.exists(gdb_path):
        print(f"Error: Geodatabase not found at {gdb_path}")
        return

    arcpy.env.workspace = gdb_path
    arcpy.env.overwriteOutput = True

    feature_dataset_name = "transportation"
    network_dataset_name = "transportation_ND"
    
    # Define the path to the feature dataset
    feature_dataset_path = os.path.join(gdb_path, feature_dataset_name)

    # Verify feature dataset exists
    if not arcpy.Exists(feature_dataset_path):
        print(f"Error: Feature dataset '{feature_dataset_name}' not found.")
        return

    # Check if a network dataset with the same name exists; if so, delete it.
    if arcpy.Exists(os.path.join(feature_dataset_path, network_dataset_name)):
        print(f"Warning: Network dataset '{network_dataset_name}' already exists. Deleting...")
        arcpy.Delete_management(os.path.join(feature_dataset_path, network_dataset_name))

    # Define edge sources
    edge_sources = [
        ["Waterways_ConnectorLinks",  "esriNETEdge", 1, 3],
        ["Railways_ConnectorLinks", "esriNETEdge", 1, 2],
        ["Streets_ConnectorLinks", "esriNETEdge", 1, 1],
        ["waterways_2020", "esriNETEdge", 1, 3],
        ["railways_2020", "esriNETEdge", 1, 2],
        ["streets_here2020_last_process", "esriNETEdge", 1, 1],
    ]

    # Define junction sources
    junction_sources = [
      ["DOEOtherFacilities", "esriNETJunction",  0, [1, 2, 3]],
      ["NuclearReactors", "esriNETJunction",  0, [1, 2, 3]],
        ["ShutdownSites", "esriNETJunction",  0, [1, 2, 3]],
        ["Waterways_Override_Junctions", "esriNETJunction",  1, [1, 2, 3]],
        ["New_Transload_Sites", "esriNETJunction",  0, [1, 2, 3]],
        ["transportation_ND_Junctions", "esriNETJunction", 0, []]
    ]

    # Create the network dataset
    arcpy.CreateNetworkDataset_na(
        in_feature_dataset=feature_dataset_path,
        out_network_dataset=network_dataset_name,
        in_edge_sources=[source[0] for source in edge_sources],
        in_junction_sources=[source[0] for source in junction_sources],
        in_turn_sources=["Streets_HERE_2020_Turns"],
        connectivity_policy="HONOR"
    )
    
    # Set properties for edge sources
    for source in edge_sources:
        if source[1] == "esriNETEdge":
          # get full path of source
          full_source_path = os.path.join(feature_dataset_path, source[0])
          # set properyies for edge sources
          arcpy.na.SetNetworkSourceProperties(
            in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
            in_source_name=full_source_path,
            in_element_type=source[1],
            connectivity_group=source[3]
          )
    
    # Set properties for junction sources
    for source in junction_sources:
        if source[1] == "esriNETJunction":
          # get full path of source
          full_source_path = os.path.join(feature_dataset_path, source[0])
          # set properyies for junction sources
          if source[3]:
              arcpy.na.SetNetworkSourceProperties(
                  in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                  in_source_name=full_source_path,
                  in_element_type=source[1],
                  connectivity_policy="ANY_VERTEX",
                  class_groups=source[3],
              )
          else:
              arcpy.na.SetNetworkSourceProperties(
                 in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                 in_source_name=full_source_path,
                 in_element_type=source[1],
                 connectivity_policy="END_VERTEX"
                 ) 

    # Define network attributes
    network_attributes = [
    {"name": "Miles", "units": "Miles", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "RoadClass", "units": "Unknown", "data_type": "esriNADTInteger", "usage_type": "esriNAUTDescriptor", "use_by_default": False},
    {"name": "Avoid Unpaved Roads", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Avoid Private Roads", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Avoid Toll Roads", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
    {"name": "AccidentRate", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Avoid Roads Closed to Radioactive Material", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Avoid X and A Abandoned Rail", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "BargeAndRailOnly", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
    {"name": "BargeAndTruckOnly", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
    {"name": "BargeOnly", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
    {"name": "Length", "units": "Meters", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "TravelTimeHeavyHaul", "units": "Minutes", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "TravelTimeLegalWeight", "units": "Minutes", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "TruckAndRailOnly", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
    {"name": "TruckOnly", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
    {"name": "Weighted_Population_2500m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
     {"name": "Weighted_Population_800m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Rail_Crossings", "units": "Unknown", "data_type": "esriNADTInteger", "usage_type": "esriNAUTCost", "use_by_default": False},
     {"name": "RailOnly", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
    {"name": "Mixed_2575_2500m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Mixed_2575_800m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Mixed_5050_2500m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Mixed_5050_800m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Mixed_7525_2500m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Mixed_7525_800m", "units": "Unknown", "data_type": "esriNADTDouble", "usage_type": "esriNAUTCost", "use_by_default": False},
    {"name": "Prefer Bypass Roads", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Prefer Radioactive Designated Roads", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Prefer Uninterrupted High Speed Traffic", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Prohibit 4WD Required Roads", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Prohibit Boat and Rail Ferry", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Prohibit R and T Abandoned Rail", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
     {"name": "Prohibit Tunnels", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
      {"name": "RAIL Density 4657 is Preferred", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
      {"name": "RAIL Multiple Tracks Preferred", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
       {"name": "RAIL Prefer HIGH Owner to Owner", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
        {"name": "RAIL Prefer LOW Owner to Trackage", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
        {"name": "RAIL Prefer LOW Trackage to Trackage", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
        {"name": "RAIL Prefer MEDIUM Trackage to Owner", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
        {"name": "RAIL Siding 1 Preferred", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
        {"name": "RAIL STRACNET CS Preferred", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
        {"name": "RAIL TrackClass 4 5 Preferred", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
       {"name": "RAIL Prohibited Carriers", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True},
    {"name": "Hierarchy", "units": "Unknown", "data_type": "esriNADTInteger", "usage_type": "esriNAUTHierarchy", "use_by_default": True},
     {"name": "RAIL Prohibit Sharp Turn", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": False},
     {"name": "Oneway", "units": "Unknown", "data_type": "esriNADTBoolean", "usage_type": "esriNAUTRestriction", "use_by_default": True}
    ]

    for attribute in network_attributes:
        # if attribute['name'] == 'Rail_Crossings':
        #     print (f"Adding attribute {attribute['name']} of data type {attribute['data_type']}")
        #     arcpy.na.AddNetworkAttribute(
        #     in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
        #     in_name=attribute['name'],
        #     in_usage_type=attribute['usage_type'],
        #     in_data_type=attribute['data_type']
        #     )
        # elif attribute['name'] == 'Hierarchy':
        #     print (f"Adding attribute {attribute['name']} of data type {attribute['data_type']}")
        #     arcpy.na.AddNetworkAttribute(
        #         in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
        #         in_name=attribute['name'],
        #         in_usage_type=attribute['usage_type'],
        #         in_data_type=attribute['data_type'],
        #         is_hierarchy = True,
        #       )
        # else:
            print (f"Adding attribute {attribute['name']} of data type {attribute['data_type']}")
            arcpy.na.AddNetworkAttribute(
                in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                in_name=attribute['name'],
                in_usage_type=attribute['usage_type'],
                in_data_type=attribute['data_type']
            )
        
    # Set restriction usage and parameters
    for attribute in network_attributes:
      if attribute['usage_type'] == 'esriNAUTRestriction':
        if 'AttributeParameters' in attribute:
           
            for parameter in attribute['AttributeParameters']:
              
              if parameter['ParameterUsageType'] == 'esriNAPUTRestriction':
                
                print (f"Setting parameter usage type for {attribute['name']} as {parameter['ParameterUsageType']}")
                arcpy.na.SetNetworkAttributeParameter(
                    in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                    in_attribute_name=attribute['name'],
                    in_parameter_name=parameter['Name'],
                    in_parameter_usage_type=parameter['ParameterUsageType'],
                    in_value=parameter['Value'],
                )
              if parameter['ParameterUsageType'] == 'esriNAPUTGeneral':
                 print (f"Setting parameter usage type for {attribute['name']} as {parameter['ParameterUsageType']}")
                 arcpy.na.SetNetworkAttributeParameter(
                    in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                    in_attribute_name=attribute['name'],
                    in_parameter_name=parameter['Name'],
                    in_parameter_usage_type=parameter['ParameterUsageType'],
                    in_value=parameter['Value']
                )
        else: 
           print (f"Seting use by default for {attribute['name']} to {attribute['use_by_default']}")
           arcpy.na.SetNetworkAttributeUsage(
                 in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                 in_attribute_name = attribute['name'],
                 is_default = attribute['use_by_default']
            )
    # Assign attribute to data sources
    
    
    for attribute in network_attributes:
        if attribute["name"] == "Miles":
            edge_names = [source[0] for source in edge_sources]
            for source_name in edge_names:
                print(f"Assigning 'Miles' attribute to {source_name}...")
                full_source_path = os.path.join(feature_dataset_path, source_name)
                arcpy.na.AddNetworkSourceAttribute(
                    in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                    in_source_name = full_source_path,
                    in_attribute_name = "Miles",
                    in_edge_direction = "esriNEDAlongDigitized",
                    use_default_value=False
                )
                
                arcpy.na.AddNetworkSourceAttribute(
                    in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                    in_source_name = full_source_path,
                    in_attribute_name = "Miles",
                    in_edge_direction = "esriNEDAgainstDigitized",
                     use_default_value=False
                )
            
        if attribute["name"] == "RoadClass":
            source_name = "streets_here2020_last_process"
            print(f"Assigning 'RoadClass' attribute to {source_name}...")
            full_source_path = os.path.join(feature_dataset_path, source_name)
            arcpy.na.AddNetworkSourceAttribute(
                in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                 in_source_name = full_source_path,
                in_attribute_name="RoadClass",
                in_edge_direction="esriNEDAlongDigitized",
                 use_default_value=False
                )
            
            arcpy.na.AddNetworkSourceAttribute(
                 in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                 in_source_name = full_source_path,
                in_attribute_name="RoadClass",
                in_edge_direction="esriNEDAgainstDigitized",
                 use_default_value=False
            )

        if attribute["name"] == "Avoid Unpaved Roads":
            source_name = "streets_here2020_last_process"
            print(f"Assigning 'Avoid Unpaved Roads' to {source_name}...")
            full_source_path = os.path.join(feature_dataset_path, source_name)
            arcpy.na.AddNetworkSourceAttribute(
                in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                 in_source_name = full_source_path,
                 in_attribute_name = "Avoid Unpaved Roads",
                in_edge_direction = "esriNEDAlongDigitized",
                 use_default_value=False
                )
            arcpy.na.AddNetworkSourceAttribute(
                in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                 in_source_name=full_source_path,
                in_attribute_name="Avoid Unpaved Roads",
                in_edge_direction="esriNEDAgainstDigitized",
                 use_default_value=False
            )
        
        if attribute["name"] == "Avoid Private Roads":
            source_name = "streets_here2020_last_process"
            print(f"Assigning 'Avoid Private Roads' to {source_name}...")
            full_source_path = os.path.join(feature_dataset_path, source_name)
            arcpy.na.AddNetworkSourceAttribute(
                in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                 in_source_name = full_source_path,
                 in_attribute_name="Avoid Private Roads",
                in_edge_direction="esriNEDAlongDigitized",
                 use_default_value=False
            )
            arcpy.na.AddNetworkSourceAttribute(
                in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                 in_source_name=full_source_path,
                in_attribute_name="Avoid Private Roads",
                in_edge_direction="esriNEDAgainstDigitized",
                use_default_value=False
             )
             
        if attribute["name"] == "Avoid Toll Roads":
            source_name = "streets_here2020_last_process"
            print(f"Assigning 'Avoid Toll Roads' to {source_name}...")
            full_source_path = os.path.join(feature_dataset_path, source_name)
            arcpy.na.AddNetworkSourceAttribute(
              in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                in_source_name=full_source_path,
                in_attribute_name = "Avoid Toll Roads",
                in_edge_direction = "esriNEDAlongDigitized",
                 use_default_value=False
            )
            
            arcpy.na.AddNetworkSourceAttribute(
                in_network_dataset = os.path.join(feature_dataset_path, network_dataset_name),
                in_source_name=full_source_path,
                in_attribute_name = "Avoid Toll Roads",
               in_edge_direction = "esriNEDAgainstDigitized",
                use_default_value=False
           )
        
        if attribute["name"] == "AccidentRate":
            edge_names = [source[0] for source in edge_sources]
            for source_name in edge_names:
                print(f"Assigning 'AccidentRate' to {source_name}...")
                full_source_path = os.path.join(feature_dataset_path, source_name)
                arcpy.na.AddNetworkSourceAttribute(
                    in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                    in_source_name = full_source_path,
                    in_attribute_name = "AccidentRate",
                    in_edge_direction = "esriNEDAlongDigitized",
                     use_default_value=False
                )
                
                arcpy.na.AddNetworkSourceAttribute(
                    in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                    in_source_name=full_source_path,
                    in_attribute_name="AccidentRate",
                    in_edge_direction = "esriNEDAgainstDigitized",
                     use_default_value=False
                )
                
        if attribute["name"] == "Avoid Roads Closed to Radioactive Material":
           source_name = "streets_here2020_last_process"
           print(f"Assigning 'Avoid Roads Closed to Radioactive Material' to {source_name}...")
           full_source_path = os.path.join(feature_dataset_path, source_name)
           arcpy.na.AddNetworkSourceAttribute(
              in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                in_source_name = full_source_path,
                in_attribute_name="Avoid Roads Closed to Radioactive Material",
                in_edge_direction="esriNEDAlongDigitized",
                 use_default_value=False
           )
           arcpy.na.AddNetworkSourceAttribute(
              in_network_dataset=os.path.join(feature_dataset_path, network_dataset_name),
                in_source_name = full_source_path,
                in_
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