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.
Locating measures by creating a starting or base station on the route
You can use this method when no stations are present on the route. You'll create a starting or base station on the route and enter the stationing values for measures. The measures will be located at an offset from the starting station. As shown in the example below, a starting station (yellow star) is temporarily located and a station value is provided. The new point event's location is then identified by using an offset distance (in station values) from that starting 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.
- Click the Edit tab.
- In the Edit Events group, click the Point Events button .
The Add Point Events dialog box appears.
If there are no editable point event layers, the dialog box is disabled.
- Click the Event Layer drop-down arrow and choose an event layer to edit.
- In the Location section, click the Method drop-down arrow and choose Starting station and offset.
The Starting Station section appears.
- In the Starting Station section, for Station, click the Select a Location on the Map tool and select the location of the starting station on a route in the map.
The location of the starting station can also be found by inserting a DGN or a DWG file containing the survey information or engineering drawing into the map. Go to the Map tab, and in the Contents group, click the Add Data button. For more information, see Adding DGN or DWG data.
- A yellow star shows the location of the starting station on a route in the map.
- The LRM measure equivalent of the location is displayed in the Location field. For example, if the LRM is milepoint, the number of miles at that location will be displayed.
- The Route Name text box is populated in the From section.
- 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.