Using stationing to locate measures
Stationing is the fundamental system of measurement used for road pipeline layout and construction. Stations are reference points that are placed along the horizontal measurement of a route centerline or a baseline at some regular interval. Generally, the distance between two adjoining stations along a route is 100 feet. The first station located at the beginning of the baseline is 0+00, and the next station located 100 feet from it is 1+00. Therefore, a station number of 10+34.05 denotes 1,034.05 feet (10*100 + 34.05) from the starting station.
The station numbers increase from west to east or south to north based on the cardinal direction of the overall pipeline. For pipeline projects, a starting reference station is first established, and then all distances along the route centerline are measured from that point location. You can add event data to routes by entering station numbers in the Point Events tool interface. The station data is translated to routes and measures for storage.
You can use the stationing data as an input for adding point events by using these three scenarios:
- Create a starting or base station on the route and enter the station values as an offset from that station.
- Identify a starting or base station on the route and enter the station values as an offset from that location.
- Use the existing stations on the route to calculate or enter the measures in the form of station values.
Using an existing station on the route as the starting station, then offset
You can use this method when you want to enter the measures using an offset distance from a selected station on the route. This functionality is available only for the LRS Networks that contain a Stationing event layer.
In the following example, a starting station (yellow dot) is temporarily located on a route with an existing station value. The new point event's location is then identified using an offset distance (in station values) from the starting/base station. When the new point events are created using this method, the stationing data is translated to routes and measures for storage.
- Open Event Editor and, if prompted, sign in to Portal for ArcGIS or ArcGIS Online.
- In the Starting Station section, for Station, click the Select a Stationing the Map tool and select one of the existing stations as the starting station on a route in the map.
- A yellow dot shows the location of the starting station on a route in the map.
- The station value of the selected station gets populated in the Station parameter.
- The station value's Units get populated.
- The Direction parameter gets populated. This indicates the direction the station values increase along the route compared to the calibration direction of the route.
- The LRM measure equivalent of the location is displayed in the Location field. For example, if the LRM is mile point, the number of miles at that location will be displayed.
- In the Location section, provide the Station number using any one of these options to allocate the Measure for the new point event:
- Click the Select a Location on the Map tool and click a location on the selected route. The station number is derived from the route.
- Type the station number.
The Measure location will be placed at an offset from the starting station.
A red cross appears at the selected location on the map.
- Choose the date that will define the start date of the event.
- Click the Start Date drop-down arrow to choose the start date using a calendar.
- Check the Use route start date check box to use the start date of the routes.
The start date defaults to today's date, but you can choose a different date using the date picker. The end date is optional, and if it is not provided, the event remains valid now and into the future.