Zusammenfassung
The Describe function returns the following properties for network datasets. The Dataset property group is also supported.
For a network dataset, the Describe dataType property returns a value of "NetworkDataset".
A network dataset is used to model transportation networks.
Eigenschaften
| Eigenschaft | Erläuterung | Datentyp |
| attributes (Schreibgeschützt) | Returns a list of Network Attribute objects. | Object |
| catalogPath (Schreibgeschützt) | The path of the network dataset. | String |
| defaultTravelModeName (Schreibgeschützt) | The name of the network dataset's default travel mode. Returns an empty string if the network dataset does not have a default travel mode. | String |
| directions (Schreibgeschützt) | Returns a Network Directions object defined for the network dataset. This object can be used to get directions information at the network dataset level. The directions property is available only if the supportsDirections property returns True. | Object |
| edgeSources (Schreibgeschützt) | Returns a list of Edge Source objects. | Object |
| elevationModel (Schreibgeschützt) | The network elevation model used to refine the connectivity of the network dataset. This property returns the following keywords:
| String |
| historicalTrafficData (Schreibgeschützt) | Returns the Historical Traffic Data object defined for the network dataset. This object can be used to get historical traffic information such as the historical traffic tables used by the network dataset. This property is available only if the supportsHistoricalTrafficData property returns True. | Object |
| isBuildable (Schreibgeschützt) | Indicates whether the network dataset can be built. SDC-based network datasets cannot be built, as they are read-only. | Boolean |
| junctionSources (Schreibgeschützt) | Returns a list of Junction Source objects. | Object |
| liveTrafficData (Schreibgeschützt) | Returns a Live Traffic Data object defined for the network dataset. This object can be used to get information about live traffic properties, such as traffic feed name used by the network dataset. This property is available only if the supportsLiveTrafficData property returns True. | Object |
| networkType (Schreibgeschützt) | The type of workspace containing the network dataset. This property returns the following keywords:
| String |
| optimizations (Schreibgeschützt) | Returns a list of strings indicating which optimizations, if any, the network dataset uses. If the network dataset has a service area index to increase the speed at which service area polygons are calculated, the value Service Area Index is returned in the list of optimizations. If the network dataset is dissolved, the value Dissolve is returned in the list of optimizations. If no optimizations are present, an empty list is returned. | String |
| sources (Schreibgeschützt) | Returns a list of Network Source objects. This property returns all the sources for the network dataset. If you want to get a list of a particular source type—for example, only the edge sources—use the edgeSources property. | Object |
| supportsDirections (Schreibgeschützt) | Indicates whether the network dataset supports generating directions. | Boolean |
| supportsHistoricalTrafficData (Schreibgeschützt) | Indicates whether the network dataset supports the use of historical traffic information. | Boolean |
| supportsLiveTrafficData (Schreibgeschützt) | Indicates whether the network dataset supports the use of live traffic information. | Boolean |
| supportsTurns (Schreibgeschützt) | Indicates whether the network dataset supports turns. | Boolean |
| systemJunctionSource (Schreibgeschützt) | Returns a System Junction Source object defined for the network dataset. This property is not available with SDC-based network datasets, as they do not support system junction sources. | Object |
| timeZoneAttributeName (Schreibgeschützt) | The name of the time zone attribute. If the network dataset does not support time zones, this property returns an empty string. | String |
| timeZoneTableName (Schreibgeschützt) | The name of the time-zone table that stores the list of time zones used by the network dataset. | String |
| trafficSupportType (Schreibgeschützt) | The type of traffic data currently configured for this network dataset. This property returns the following keywords:
| String |
| turnSources (Schreibgeschützt) | Returns a list of Turn Source objects. | Object |
Codebeispiel
Display some network dataset properties.
# Name: NDSProperties_ex01.py
# Description: Print some of the network dataset properties.
import arcpy
# Set the workspace
arcpy.env.workspace = "C:/Data/Paris.gdb/Transportation"
# Create Describe object for the network dataset
desc = arcpy.Describe("ParisMultimodal_ND")
# Print general network dataset properties
print("Network type: " + desc.networkType)
print("Supports turns? " + str(desc.supportsTurns))
print("Supports directions? " + str(desc.supportsDirections))
print("Is buildable? " + str(desc.isBuildable))
print("Elevation model: " + desc.elevationModel)
print("Supports historical traffic data: " + str(desc.supportsHistoricalTrafficData))
print("Time zone attribute name: " + desc.timeZoneAttributeName)
print("Time zone table name: " + desc.timeZoneTableName)
print("Optimizations: " + ", ".join(desc.optimizations))