Network Dataset properties

Zusammenfassung

The Describe function returns the following properties for network datasets. Dataset Properties are also supported.

A network dataset returns a dataType of "NetworkDataset".

A network dataset is used to model transportation networks.

Eigenschaften

EigenschaftErklärungDatentyp
attributes
(Nur lesen)

Returns a list of Network Attribute objects.

Object
catalogPath
(Nur lesen)

The path of the network dataset.

String
defaultTravelModeName
(Nur lesen)

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
(Nur lesen)

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
(Nur lesen)

Returns a list of Edge Source objects.

Object
elevationModel
(Nur lesen)

The network elevation model used to refine the connectivity of the network dataset. This property returns the following keywords:

  • None
  • Elevation Fields
  • Z Coordinate Values

String
historicalTrafficData
(Nur lesen)

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
(Nur lesen)

Indicates if the network dataset can be built. SDC-based network datasets cannot be built as they are read-only.

Boolean
junctionSources
(Nur lesen)

Returns a list of Junction Source objects.

Object
liveTrafficData
(Nur lesen)

Returns a Live Traffic Data object defined for the network dataset. This object can be used to get the 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
(Nur lesen)

The type of workspace containing the network dataset. This property returns the following keywords:

  • Geodatabase
  • Shapefile
  • SDC

String
optimizations
(Nur lesen)

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
(Nur lesen)

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 particular source type—for example, only the edge sources—use the edgeSources property.

Object
supportsDirections
(Nur lesen)

Indicates if the network dataset supports generating directions.

Boolean
supportsHistoricalTrafficData
(Nur lesen)

Indicates if the network dataset supports the use of historical traffic information.

Boolean
supportsLiveTrafficData
(Nur lesen)

Indicates if the network dataset supports the use of live traffic information.

Boolean
supportsTurns
(Nur lesen)

Indicates if the network dataset supports turns.

Boolean
systemJunctionSource
(Nur lesen)

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
(Nur lesen)

The name of the time zone attribute. If the network dataset does not support time zones, this property returns an empty string.

String
timeZoneTableName
(Nur lesen)

The name of the time-zone table that stores the list of time zones used by the network dataset.

String
trafficSupportType
(Nur lesen)

The type of traffic data currently configured for this network dataset. This property returns the following keywords:

  • HISTORICAL
  • HISTORICAL_AND_LIVE
  • LIVE
  • NONE
If live traffic data is supported (supportsLiveTrafficData returns True), but a feed source has not been configured, this property will return HISTORICAL.

String
turnSources
(Nur lesen)

Returns a list of Turn Source objects.

Object

Codebeispiel

Network Dataset Properties example

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))