Label | Explanation | Data Type |
Network Data Source | The network dataset or service on which the network analysis will be performed. Use the portal URL for a service. | Network Dataset Layer;String |
Layer Name (Optional) | The name of the network analysis layer to create. | String |
Travel Mode (Optional) | The name of the travel mode to use in the analysis. The travel mode represents a collection of network settings, such as travel restrictions and U-turn policies, that determine how a pedestrian, car, truck, or other medium of transportation moves through the network. Travel modes are defined on your network data source. An arcpy.na.TravelMode object and a string containing the valid JSON representation of a travel mode can also be used as input to the parameter. | String |
Travel Direction
(Optional) | Specifies the direction of travel to or from the facilities. Using this parameter can result in different service areas on a network with one-way restrictions and different impedances based on direction of travel. The service area for a pizza delivery store, for example, should be created away from the facility, whereas the service area of a hospital should be created toward the facility.
| String |
Cutoffs
(Optional) |
The extent of the service area to be calculated in the units of the impedance attribute used by your selected travel mode. For example, when analyzing driving time, a cutoff value of 10 means that the resulting service area will represent the area reachable within a 10-minute drive time. Multiple cutoffs can be set to create concentric service areas. For example, to find 2-, 3-, and 5-minute service areas for the same facility, specify 2, 3, and 5 as the values for this parameter. This default cutoff value can be overridden on a per-facility basis by specifying individual break values in the facilities sublayer. | Double |
Time of Day
(Optional) | The time to depart from or arrive at the facilities of the service area layer. The interpretation of this value as a departure or arrival time depends on whether travel is away from or toward the facilities.
The Time of Day parameter is most useful for finding the roads that can be reached based on a travel mode that uses an impedance attribute that varies with the time of the day, such as one based on dynamic traffic conditions. Solving the same analysis using different Time of Day values allows you to see how a facility's reach changes over time. For example, the five-minute service area around a fire station may start out large in the early morning, diminish during the morning rush hour, grow in the late morning, and so on, throughout the day. A date and time can be specified as 10/21/2015 10:30 AM. Instead of using a particular date, a day of the week can be specified using the following dates:
| Date |
Time Zone
(Optional) | Specifies the time zone for the time of day parameter.
| String |
Output Type
(Optional) | Specifies the type of output to be generated. Service area output can be line features representing the roads reachable before the cutoffs are exceeded or the polygon features encompassing these lines (representing the reachable area). The Lines and Polygons and lines output types are not available if the network data source is a service on a version of Portal for ArcGIS that does not support line generation.
| String |
Polygon Detail
(Optional) | Specifies the level of detail of the output polygons. If your analysis includes an urban area with a grid-like street network, the difference between generalized and standard polygons will be minimal. However, for mountain and rural roads, the standard and detailed polygons may present significantly more accurate results than generalized polygons.
| String |
Geometry at Overlaps
(Optional) | Specifies the behavior of service-area output from multiple facilities in relation to one another.
| String |
Geometry at Cutoffs
(Optional) | Specifies the behavior of service area output for a single facility when multiple cutoff values are specified. This parameter does not apply to line output.
| String |
Polygon Trim Distance
(Optional) | The service area polygon trim distance. The polygon trim distance is the distance the service area polygon will extend from the road when no other reachable roads are nearby, similar to a line buffer size. This is useful when the network is sparse and you don't want the service area to cover large areas where there are no features. This parameter includes a value and units for the distance. The default value is 100 meters. | Linear Unit |
Exclude Sources From Polygon Generation (Optional) | The network dataset edge sources that will be excluded when generating service area polygons. Polygons will not be generated around the excluded sources, even though they are traversed in the analysis. Excluding a network source from service area polygons does not prevent those sources from being traversed. Excluding sources from service area polygons only influences the polygon shape of the service areas. To prevent traversal of a given network source, you must create an appropriate restriction when defining your network dataset. This is useful if you have some network sources that you don't want to be included in the polygon generation because they create less accurate polygons or are inconsequential for the service area analysis. For example, while creating a walk-time service area in a multimodal network that includes streets and metro lines, you should choose to exclude the metro lines from polygon generation. Although the traveler can use the metro lines, they cannot stop partway along a metro line and enter a nearby building. Instead, they must travel the full length of the metro line, exit the metro system at a station, then use the streets to walk to the building. It would be inaccurate to generate a polygon feature around a metro line. This parameter is not available when the output geometry types do not include polygons, there are less than two edge sources in the network, the network data source is an ArcGIS Online service, or the network data source is a service on a version of Portal for ArcGIS which does not support excluding sources. | String |
Accumulate Attributes (Optional) | A list of cost attributes to be accumulated during analysis. These accumulated attributes are for reference only; the solver only uses the cost attribute used by your designated travel mode when solving the analysis. For each cost attribute that is accumulated, a Total_[Impedance] property is populated in the network analysis output features. This parameter is not available if the analysis layer is not configured to output lines, the network data source is an ArcGIS Online service, or the network data source is a service on a version of Portal for ArcGIS that does not support accumulation. | String |
Ignore Invalid Locations at Solve Time
(Optional) | Specifies whether invalid input locations will be ignored. Typically, locations are invalid if they cannot be located on the network. When invalid locations are ignored, the solver will skip them and attempt to perform the analysis using the remaining locations.
| Boolean |
Derived Output
Label | Explanation | Data Type |
Network Analyst Layer | The newly created network analysis layer. | Network Analyst Layer |