Label | Explanation | Data Type |
Input Analysis Network | The network dataset on which the service area analysis will be performed. | Network Dataset Layer |
Output Layer Name | Name of the service area network analysis layer to create. | String |
Impedance Attribute | The cost attribute to be used as impedance in the analysis. | String |
Travel From or To Facility (Optional) | Specifies the direction of travel to or from the facilities. Using this option can result in different service areas on a network with one-way restrictions and having 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 |
Default Break Values (Optional) | Default impedance values indicating the extent of the service area to be calculated. The default can be overridden by specifying the break value on the facilities. Multiple polygon breaks can be set to create concentric service areas. For instance, to find 2-, 3-, and 5-minute service areas for the same facility, specify "2 3 5" as the value for the Default break values parameter (the numbers 2, 3, and 5 should be separated by a space). | String |
Polygon Type (Optional) | Specifies the type of polygons to be generated. If your data is of an urban area with a gridlike network, the difference between generalized and detailed polygons would be minimal. However, for mountain and rural roads, the detailed polygons may present significantly more accurate results than generalized polygons.
| String |
Merge Polygons with Similar Ranges (Optional) | Specifies the options to merge polygons that share similar break values. This option is applicable only when generating polygons for multiple facilities.
| String |
Polygon Nest Option (Optional) | Specifies the option to create concentric service area polygons as disks or rings. This option is applicable only when multiple break values are specified for the facilities.
| String |
Line Type (Optional) | Specifies the type of lines to be generated based on the service area analysis. Selecting the True Lines or True lines with measures option for large service areas will increase the amount of memory consumed by the analysis.
| String |
Overlap Lines (Optional) | Determines whether overlapping lines are generated when the service area lines are computed.
| Boolean |
Split Lines when They Cross a Service Area Break (Optional) |
| Boolean |
Exclude Sources from Polygon Generation (Optional) | Specifies the list of network sources to be excluded when generating the polygons. The geometry of traversed elements from the excluded sources will be omitted from all polygons. 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 drive time service area in a multimodal network of streets and rails, you should choose to exclude the rail lines from polygon generation so as to correctly model where a vehicle could travel. 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. If you want to prevent traversal of a given network source, you must create an appropriate restriction when defining your network dataset. | String |
Accumulators (Optional) | A list of cost attributes to be accumulated during analysis. These accumulation attributes are for reference only; the solver only uses the cost attribute specified by the Impedance Attribute parameter to calculate the route. For each cost attribute that is accumulated, a Total_[Impedance] property is added to the routes that are output by the solver. | String |
U-Turn Policy
(Optional) | Specifies the U-turn policy that will be used at junctions. Allowing U-turns implies that the solver can turn around at a junction and double back on the same street. Given that junctions represent street intersections and dead ends, different vehicles may be able to turn around at some junctions but not at others—it depends on whether the junction represents an intersection or a dead end. To accommodate this, the U-turn policy parameter is implicitly specified by the number of edges that connect to the junction, which is known as junction valency. The acceptable values for this parameter are listed below; each is followed by a description of its meaning in terms of junction valency. If you need a more precisely defined U-turn policy, consider adding a global turn delay evaluator to a network cost attribute or adjusting its settings if one exists, and pay particular attention to the configuration of reverse turns. You can also set the CurbApproach property of your network locations.
| String |
Restrictions (Optional) | A list of restriction attributes to be applied during the analysis. | String |
Trim Polygons (Optional) |
| Boolean |
Polygon Trim (Optional) | Specifies the distance within which the service area polygons are trimmed. The parameter includes a value and units for the distance. The default value is 100 meters. | Linear Unit |
Include Network Source Fields in Lines (Optional) |
| Boolean |
Use Hierarchy in Analysis (Optional) |
The parameter is inactive if a hierarchy attribute is not defined on the network dataset used to perform the analysis. | Boolean |
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 depart or arrive time depends on whether travel is away from or toward the facilities.
If you have chosen a traffic-based impedance attribute, the solution will be generated given dynamic traffic conditions at the time of day specified here. A date and time can be specified as 5/14/2012 10:30 AM. Instead of using a particular date, a day of the week can be specified using the following dates.
Repeatedly solving the same analysis, but using different Time of Day values, allows you to see how a facility's reach changes over time. For instance, 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. | Date |
Derived Output
Label | Explanation | Data Type |
Network Analyst Layer | The newly created network analysis layer. | Network Analyst Layer |