Adding calibration points

The calibration points used by Roads and Highways to calibrate routes are a simple feature class. ArcGIS editing tools can be used to edit and add them in conjunction with the Roads and Highways extension to calibrate routes or time-saving tools provided by the Roads And Highways Editing toolbar. This topic discusses both methods.

Using the Add Calibration Point tool

The Add Calibration Point tool on the Roads And Highways Editing toolbar allows you to add one or more calibration points to a route. Roads and Highways will apply calibration to the route it references and apply calibration event behavior. This tool also allows downstream recalibration to be applied to a route where a calibration point is added.

Step A—Calibration points and route calibration before adding calibration points.

Step B—Add a new calibration point with the measure 5 (4 was the suggested measure based on the current calibration of the route at that location, but the user changes it to 5) with Recalibrate downstream selected.

Step C—When Apply Updates tool is executed, downstream calibration points have calibration updated and the route is recalibrated.

Step A—Calibration points and route calibration before adding calibration points.

Step B—Add a new calibration point with the measure 5 (4 was the suggested measure based on the current calibration of the route at that location, but the user changes it to 5) with Recalibrate downstream unselected.

Step C—When Apply Updates tool is executed, calibration for the route is updated based on the newly added point, but no downstream calibration is added.

1. Set the target LRS Network layer on the Roads And Highways Editing toolbar.
2. Click the Add Calibration Point button on the Roads And Highways Editing toolbar.
3. Click the location on the map along the route where the calibration point will be added.

   The Add Calibration Point dialog box appears.

   

   The Network text box is populated with the network selected on the Roads And Highways Editing toolbar. The Start Date and Retire Date text boxes are populated with the start date and retire date of the route in the map. The Route ID text box is populated with the route ID for the route selected on the map. The Measure text box is populated with the measure for the location selected on the route based on the map.

4. You can change the Start Date and Retire Date depending on when this calibration is active.
5. You can change the measure to the calibration at the selected location.
6. Choose whether you want to recalibrate the route downstream using the Recalibrate downstream check box.
   • Checking the box will apply recalibration to downstream calibration points along the route. For example, existing calibration at the location where the calibration point is being added is 9, and the next downstream calibration point at the end of the route has a measure of 15. If the measure in step 7 was changed to 10 and Recalibrate downstream is checked, the downstream calibration point would have 1 added to the measure and change to 16.
   • Leaving the box unchecked will result in no recalibration for the next downstream calibration point along the route. Using the example above, changing the measure from 9 to 10 but not checking the Recalibrate downstream check box would result in the downstream calibration point maintaining a measure of 15.
7. Click OK.

   Note:

   If a message appears that is related to acquiring locks, the need to reconcile, or not being able to acquire locks, Roads and Highways conflict prevention is enabled. For more information about these messages, see Conflict prevention in Roads and Highways for Desktop.

   The Add Calibration Point dialog box closes and the calibration point appears on the map at the location selected in step 3.

   Note:

   Calibration on the route is not updated at this point.
8. If more calibration points are ready to be added, repeat steps 1 through 7 to add them.
9. Once all calibration points have been added, click the Apply Updates button from the Roads And Highways Editing toolbar.

   Calibration is updated (including downstream recalibration if chosen) and event behaviors are applied for routes with calibration points added.

   Note:

   Recalibrating downstream will change the measure of the calibration points downstream along a route. Choosing to apply edits after each edit, or after a series of edits, could result in different calibration being applied to downstream calibration points. Consider what the desired downstream measures of a route with calibration points being added should be before determining whether downstream recalibration should be chosen and when edits should be applied if multiple calibration points are being added.

   

   Step A—Calibration points and route calibration before adding calibration points.

   Step B—Add new calibration points with measures of 5 and 9 (4 and 8 were the suggested measures based on the current calibration of the route at those locations, but the user changed them to 5 and 9) with recalibrate downstream selected.

   Step C—Apply Updates tool is executed after adding both calibration points; downstream calibration points have calibration updated and the route is recalibrated.

   

   Step A—Calibration points and route calibration before adding calibration points.

   Step B—Add new calibration point with measure of 5 (4 was the suggested measure based on the current calibration of the route at that location, but the user changed it to 5) with recalibrate downstream selected.

   Step C—Apply Updates tool is executed after adding the calibration point; downstream calibration points have calibration updated and the route is recalibrated.

   Step D—Add new calibration point with measure of 10 (9 was the suggested measure based on the current calibration of the route at that location, but the user changed it to 10) with recalibrate downstream selected.

   Step E—Apply Updates tool is executed again after adding the calibration point; downstream calibration points have calibration updated again and the route is recalibrated.

   

   Step A—Calibration points and route calibration before adding calibration points.

   Step B—Add new calibration point with measure of 10 (9 was the suggested measure based on the current calibration of the route at that location, but the user changed it to 10) with recalibrate downstream selected.

   Step C—Apply Updates tool is executed after adding the calibration point; downstream calibration points have calibration updated and the route is recalibrated.

   Step D—Add new calibration point with measure of 5 (4 was the suggested measure based on the current calibration of the route at that location, but the user changed it to 5) with recalibrate downstream selected.

   Step E—Apply Updates tool is executed again after adding the calibration point; the route is recalibrated, however, the downstream calibration points don't have calibration added because the Apply Updates in step C added downstream calibration to those calibration points.

Adding calibration points using ArcMap editing tools

Roads and Highways listens for edits made in the calibration point feature class. If you add a new calibration point, Roads and Highways will attempt to apply the new calibration to whatever route it references.

1. Add a new calibration point feature by snapping to your route.
   • Create a point by copying and pasting an existing point.

     Tip:

     Copying and pasting is the easiest way to add new points. This can be done by copying an existing calibration point along the same route, moving it, and modifying its attributes, or by copying calibration points from a shapefile or other feature class and pasting them into the calibration point feature class.

   • Create a point at an exact x,y location.
   • Create a point at the end of a line you sketch.
   • Create a point at a distance and direction from a specific location.
   • Create a point at the intersection of two distances.
   • Create a point at the intersection of two segments.
   • Create a point at the midpoint of two locations.
2. Update the attributes of the new calibration points.
   1. Provide a route ID.
   2. Specify the LRS Network ID.

      Note:

      If a message appears that is related to acquiring locks, the need to reconcile, or not being able to acquire locks, Roads and Highways conflict prevention is enabled. For more information about these messages, see Conflict prevention in Roads and Highways for Desktop.

   3. Assign a measure value.
   4. Set the From Date of the calibration point.
   5. Optionally provide a To Date if you know when it was or is expected to be retired.
   6. Optionally give the point a calibration point ID.
3. After you have added calibration points, click the Apply Updates button from the Roads And Highways Editing toolbar.

   The route is recalibrated by regenerating its shape based on the updated calibration points and its measures, and event data is updated based on the event layers' Calibrate Route rules.