Set the time view for LRS data in a group

适用于 Location Referencing 许可。

Enable temporality for LRS elements such as networks, events, and calibration points by establishing the From and To dates for LRS elements such as networks, events, and calibration points. Once time is enabled for these layers, you can see what a feature looked like at a given point in time and compare that to how it looks today.

Use the following steps to enable time for the LRS layers in a map:

1. Add LRS elements such as network, event, and calibration point to the map.
2. Browse to the Location Referencing tab, in Tools group, and click the Enable Time button .

   Time is enabled for the LRS layers and the time slider appears.

   • Time is enabled only for those network, event, and calibration point layers present in the map.
   • Time is not enabled for centerline, redline layers, or tables present in the map.
   • The tool populates the following parameters in the Layer Properties dialog box on the Time tab.

   

   1. Layer Time—Each feature has start and end time fields
   2. Start Time Field—From Date field of the LRS layer
   3. End Time Field—To Date field of the LRS layer
   4. Time Extent—Calculated using the following formula considering all the LRS layers in the map:
      • From Date—Min (Earliest date - 20 years, Today's date - 20 years)
      • To Date—Max (Furthest date + 20 years, Today's date + 20 years)

   The following examples apply the formula using today's date as 10/10/2019.

   Input (considering all LRS layers)			Output (applied to all LRS Layers)
   #	Min (From Date)	Max (To Date)	From Date	To Date
   1	1/1/2000	Null	1/1/1980	10/10/2039
   2	1/1/2000	1/1/2030	1/1/1980	1/1/2050
   3	Null	Null	10/10/1999	10/10/2039
   4	1/1/2000	Null	10/10/1999	10/10/2039

   The Enable Time button becomes active after clicking it the first time. You can disable time for the LRS layers by clicking the button when it's in the active state.

   If the button is active, all the LRS layers in the map have their time enabled and so do any subsequent LRS layers added to the map.

   The time properties enabled on the map are preserved when the project is saved.