Reassign routes

Available with Location Referencing license.

Reassignment is the technique by which all or a portion of a route or line is moved, or reassigned, to the immediate upstream or downstream of another route or line. Another example is to redesignate a portion of a road that now falls on the other side of a boundary after administrative boundaries change.

In addition to route reassignment, the Reassign Route tool can update attribute fields and calibration points located along the reassigned route.

Scenarios that can be accomplished using the reassign activity are described below.

Note:

For all of the following scenarios, you can choose entire routes or partial routes:

Merging routes to an existing route

RouteX and RouteY are adjoining routes. You can use the Reassign Route tool to merge RouteX with RouteY or vice versa. The existing RouteX and RouteY are retired. You can merge the reassigned portion to any immediate upstream or downstream route.

Source
Route ID	RouteX
From Measure	0
To Measure	20
Target
Route ID	RouteY
From Measure	0
To Measure	30

Splitting an existing route

Route XYZ has measures from 0 to 30. In the following example, the route is split in two: Route1 (which is a new route), and a new version of RouteXYZ. The existing RouteXYZ is retired as a result of this operation.

Source
Route ID	RouteXYZ
From Measure	0
To Measure	19
Target
Route ID	Route1 (new)
From Measure	0
To Measure	19

Renaming a route

You can rename an existing route and change its From and To measure values using the Reassign Route tool. RouteXYZ is renamed Route123, with new measures. The existing RouteXYZ is retired as a result of this operation.

Source
Route ID	RouteXYZ
From Measure	0
To Measure	30
Target
Route	Route123
From Measure	15
To Measure	45

Transferring calibration points to a target route

You can transfer calibration points to a target route on networks that have a user-created Route ID.

Note:

The option to transfer calibration points to a target route during reassignment is checked by default and is the preferred method to maintain established measures.

Source
Route ID	RouteX
From Measure	0
To Measure	20
Target
Route	RouteY
From Measure	0
To Measure	30

Downstream recalibration

The following examples describe recalibrating downstream. You can reassign routes with the source route calibrated or not calibrated downstream:

Reassignment with the source route not calibrated downstream

In this case, RouteX is split into two routes: Route1, which begins at the start of the old RouteX and ends at the middle of the old RouteX. The to measure value of the newly created Route1 has been changed to 3 instead of the suggested measure of 5. Since the Recalibrate route downstream check box is unchecked for the source route, the downstream route's (RouteX) measures remain intact.

Source
From Route	RouteX
From Measure	0
To Route (option only for networks with lines)	RouteX
To Measure	5
Target
Route	Route1 (new)
From Measure	0
To Measure	3

Reassignment with the source route calibrated downstream

In this case, RouteX is split into two routes: Route1, which starts at the beginning of the old RouteX and ends at the middle of the old RouteX. The to measure value of the newly created Route1 has been changed to 3 instead of the suggested measure of 5. If the Recalibrate route downstream check box is unchecked for the source route, the downstream route RouteX’s measures change to the from measure value of 0 and to measure value of 5.

Source
From Route	RouteX
From Measure	0
To Route (option only for networks with lines)	RouteX
To Measure	5
Target
Route	Route1 (new)
From Measure	0
To Measure	3

Reassignment with the target route calibrated downstream

In this case, a part of RouteX is merged with the adjoining route, RouteY. The reassignment takes place from the middle of RouteX on the downstream side. Since the Recalibrate route downstream check box is unchecked for the target route, the measure of RouteY downstream of the reassigned portion is recalibrated. The new version of RouteY now has a to measure value of 9.

Source
From Route	RouteX
From Measure	5
To Measure	10
Target
Route	RouteY
From Measure	0
To Measure	9

Complex route reassignment scenarios

The following examples present scenarios for reassignment on complex routes and shapes, including loop, lollipop, branch, and barbell shapes:

Reassignment resulting in a loop

In the following example, RouteX and RouteY are merged to create a loop route after reassignment. RouteX has measures 0 to 2 and RouteY has measures 2 to 4:

Source
From Route	RouteX
From Measure	0
To Measure	2
Recalibrate source route	No
Target
To Route	RouteY
From Measure	0
To Measure	2
Recalibrate target route	No

After reassignment, a calibration point is added at measure 1 and RouteY is recalibrated with measures 0 to 4.

Splitting an existing loop

In the following example, a route (RouteX) on a loop with measures 0 to 12 is split and the edit section is reassigned to a new route (RouteY):

Source
From Route	RouteX
From Measure	0
To Measure	4
Recalibrate source route	Yes
Target
To Route	RouteY
From Measure	0
To Measure	4
Recalibrate target route	No

After reassignment, RouteY is created with measures 0 to 4. The calibration point formerly at 8 is updated to 4 and RouteX is recalibrated with measures 0 to 8.

Reassignment resulting in a lollipop

RouteX has measures 0 to 4 and RouteY has measures 0 to 1. In the following example, a loop route (RouteX) is merged with a simple route (RouteY) to create a lollipop route after reassignment:

Source
From Route	RouteX
From Measure	0
To Measure	4
Recalibrate source route	No
Target
To Route	RouteY
From Measure	1
To Measure	5
Recalibrate target route	Yes

After reassignment, the resulting lollipop route (RouteY) has updated measures 0 to 5.

Splitting an existing lollipop

RouteX has measures 0 to 5 and RouteY has measures 0 to 1. In the following example, the stick portion of a lollipop route (RouteX) is split and reassigned to an existing route (RouteY):

Source
From Route	RouteX
From Measure	0
To Measure	1
Recalibrate source route	Yes
Target
To Route	RouteY
From Measure	0
To Measure	1
Recalibrate target route	Yes

After reassignment, both routes are recalibrated. The updated simple route (RouteY) has measures 0 to 2, while the loop route (RouteX) has measures 0 to 4.

RouteX has measures 0 to 15. In the following example, part of a lollipop route (RouteX) is split and reassigned to a new route (RNew):

Source
From Route	RouteX
From Measure	4
To Measure	8
Recalibrate source route	Yes
Target
To Route	RNew
From Measure	0
To Measure	4
Recalibrate target route	No

After reassignment, a simple route (RNew) created from the edit section has measures 0 to 4, while the branch route (RouteX) has measures 0 to 12.

Merging multiple routes to create a barbell

In the following example, a loop route (RouteX) with measures 0 to 4 is merged with a lollipop route (RouteY) that has measures from 0 to 5:

Source
From Route	RouteX
From Measure	0
To Measure	4
Recalibrate source route	No
Target
Target Route	RouteY
From Measure	5
To Measure	9
Recalibrate target route	Yes

After reassignment, a new barbell route (RouteY) is created from the merged routes. RouteY has recalibrated measures from 0 to 9.

Merging simple routes to create a branch

In this example, a simple route (RouteY) is merged to another simple route (RouteX) to create a branch route after reassignment. RouteX has measures 0 to 6, while RouteY has measures from 5 to 10.

Source
From Route	RouteY
From Measure	5
To Measure	10
Recalibrate source route	No
Target
To Route	RouteX
From Measure	6
To Measure	11
Recalibrate target route	Yes

After reassignment, RouteY is merged with RouteX to create a branch route with recalibrated measures 0 to 11.

Splitting an infinity route

In the following example, an existing infinity route (RouteX) with measures 0 to 24 is split to create an alpha route and a new simple route (RNew):

Source
From Route	RouteX
From Measure	18
To Measure	24
Recalibrate source route	Yes
Target
To Route	RNew
From Measure	0
To Measure	6
Recalibrate target route	No

After reassignment, RouteX is an alpha route with measures 0 to 18, and the new route (RNew) has measures 0 to 6.

Parameters in the networks

The following tables describe the parameters used in the Reassign Route tool:

Reassign with the source route not calibrated downstream

Parameter	Description
Network	The network in which the routes exist.
Effective Date	This is the date when the reassignment has taken place on the ground.
Source Route: Route ID	The route where the reassignment takes place.
Source Route: From Measure	The measure on the source route where the reassignment starts; shown by the green dot.
Source Route: To Measure	The measure on the source route where the reassignment ends; shown by the red dot.
Target Route: Route ID	The route to which the reassigned portion will be added. This can also be a new route.
Target Route: From Measure	The starting measure on the reassigned portion.
Target Route: To Measure	The ending measure on the reassigned portion.

The following image shows the Reassign Route pane on a network that has a user-created, single-field Route ID.

The Reassign Route pane on a network with a user-created, single-field Route ID is shown.

The following image shows the Reassign Route pane on a network that has a user-created, multi-field Route ID.

The Reassign Route pane on a network that has a user-created, multi-field Route ID is shown.

Attributes

If your network has attribute fields other than the system-defined fields, you can either transfer the existing values of the source route or provide new values in the Reassign Route pane. The existing values of the source route are populated by default.

This attribute section also supports domains, subtypes, contingent values, and attribute rules.

Note:

The field alias appears in the Reassign Route pane rather than the field name.

Note:

Gap calibration rules are followed when editing routes.

The following steps can be used to implement any reassign scenario:

1. Add the network feature class to a map.

   You can also open a map in which the network feature class is already present.

   Note:

   Traditionally versioned networks must be edited through a direct connection to the geodatabase. Branch versioned networks, which include any network configured with a user-generated route ID, must be edited through a feature service.

2. Zoom in to the location where you want to reassign the route.
3. Click the Reassign button on the Location Referencing tab.

   The Reassign Route pane appears.

4. Click the Network drop-down arrow to choose the network in which you want to do route reassignment.

   Note:

   To edit using feature services, the LRS Network must be published with the linear referencing and version management capabilities.

5. Click the Effective Date drop-down arrow and choose a date for the edit.

   Tip:

   • Optionally, provide the date in the Effective Date text box.
   • Double-click the empty Effective Date text box to populate it with today's date.
6. In the Source Route section, click the Choose route from map button and click the route on the map to populate Route ID.
7. Provide a from measure value for the route using one of the following options:

   • Provide a From Measure value in the From Measure text box.

   • Click the Choose measure from map button and click a measure on the map.

   • Check the Use route start measure check box.

   A green dot is placed at the location. The reassignment starts from this location.

8. Provide a to measure value using one of the following options:

   • Provide a To Measure value in the To Measure text box.

   • Click the Choose measure from map button and click a measure on the map.

   • Check the Use route end measure check box.

   A red dot is placed at the location. The reassignment takes place on the routes or the portions of routes that exist between the green and red dots. The routes that are intersected by the reassignment portion are retired.

9. Choose whether to recalibrate the remainder of the reassigned route downstream of the reassigned portion.
   • Check the Recalibrate route downstream check box to recalibrate the remainder of the reassigned route downstream of the reassigned portion.
   • Uncheck the Recalibrate route downstream check box if you do not want to recalibrate the remainder of the reassigned route downstream of the reassigned portion.
10. Provide a From Measure value for the target route reassignment location using one of the following options:

    • Provide a value in the From Measure text box.

    • Click the Recalculate From Measure button . The From Measure value is calculated as the source measure length minus the To Measure value.

    Note:

    • If you are filling a gap, this value is equal to the measure at the beginning of the gap.
    • If you are adding the reassigned route to the end of the target route, this value is equal to the end measure of the target route.
    • If you are creating a route or adding the reassigned portion to the beginning of the target route, this value is 0.

    Note:

    For the line network, the measures can be entered as station values in 00+00.00 or 00+00.000 format.

11. Provide the to measure value of the target route reassignment location using one of the following options:

    • Provide a value in the To Measure text box.

    • Click the Recalculate To Measure button . The To Measure value is calculated as the source measure length minus the from measure value.

    Note:

    • If you are filling a gap, this value is equal to the measure at the end of the gap.
    • If you are creating a route or adding the reassigned value to the end of the target route, this value is equal to the new end measure of the route.
    • If you are adding the reassigned route to the beginning of the target route, this value is equal to the total length in the linear referencing method (LRM) measure units of the reassigned portion.

12. Choose whether you want to recalibrate the remainder of the reassigned route downstream of the reassigned portion.
    • Check the Recalibrate route downstream check box to recalibrate the remainder of the reassigned route downstream of the reassigned portion.
    • Uncheck the Recalibrate route downstream check box if you do not want to recalibrate the remainder of the reassigned route downstream of the reassigned portion.
13. Choose whether to transfer the source calibration points to the target route.

    The Transfer calibration points to the target route check box is checked by default and is the preferred method to maintain established measures between points.

    Note:

    All of the calibration points between and including the from measure and to measure values, even those spanning routes in between, are included in the transfer of calibration points to the target route.

    The Reassign Route pane is fully populated.

14. Click Run.

    Note:

    If your route edit will result in the introduction of one or more physical gaps on the route, a prompt appears to alert you before the tool is run. If you didn't plan to create a gapped route, answer No and edit your digitized centerlines so that no gaps result during route editing.

    If the route being edited already had one or more physical gaps, and no additional physical gaps were introduced by the edit, no prompt will appear.

    You can prevent unplanned centerlines by enabling snapping in the active map, or by enabling snapping using the Edit tab, Snapping group, Snapping button .

    You can disable this warning by unchecking the Warn before allowing route edits that can create physical gaps check box in Location Referencing options.

    The route is reassigned.

    Note:

    If a message about acquiring locks or reconciling appears, conflict prevention is enabled.

Reassign routes in a line network

Routes in a line network can be reassigned to new or existing routes as shown in the following examples.

Reassign to a new route

In the following example, reassignment of the middle portion of RouteX to a new route is shown.

Input

Route ID	Line order
RouteX	100
RouteY	200

After reassignment, RouteA is created from the reassigned middle portion. Line order has been updated with the new RouteA at 200 and RouteY moved to 300 in the line order.

Output

Route ID	Line order
RouteX	100
RouteA	200
RouteY	300

Reassign to an existing route

In the following example, the middle portion of a route will be assigned to an existing route.

Input

Route ID	Line order
RouteX	100
RouteY	200

The middle portion of RouteX will be reassigned to the existing route, RouteY.

Output

Route ID	Line order
RouteX	100
RouteY	200

After reassignment, the middle portion of RouteX has been reassigned to the existing route, RouteY.

Reassign to an existing route on an adjacent line

In the following example, the middle portion of a route will be reassigned to an existing route in adjacent line.

Input

Route ID	Line order	Line ID
RouteX	100	LineA
RouteY	100	LineB

The middle portion of RouteX on LineA will be reassigned to the existing route, RouteY, on an adjacent line, LineB.

Output

Route ID	Line order	Line ID
RouteX	100	LineA
RouteY	100	LineB

The middle portion of RouteX on LineA has been reassigned to the existing route, RouteY, on an adjacent line, LineB.