To stake out an arc

Before you start, configure your navigation display settings. You can stake relative to a DTM or the design elevation, if required.

  1. Do one of the following:

    • Tap and select Stakeout / Arcs and then tap next to the Arc name field to view a list of previously defined arcs to select from.
    • In the map, select the arc to be staked out. Tap Stakeout.

      • When selecting an arc to stake out, tap near the end of the arc that you want to designate as the start. Arrows are then drawn on the arc to indicate the direction. If the direction of the arc is incorrect, tap the arc to deselect it and then tap it at the correct end to reselect the arc in the direction required. Alternatively tap and hold in the map and select Reverse arc direction.

      If the arc has been offset, the offset directions are not swapped when the arc direction is reversed.

  2. In the Stake field, select the method and then fill out the required fields. Refer to the Arc stakeout methods below.

    To select the station to stake, key it in, tap the Sta‑ and Sta+ softkeys, or tap next to the Station fields to select the start or end station.

    When staking a station or staking to the arc you can tap another station or arc in the map to change what you are staking, and the stakeout details in the adjacent panel update to reflect the new selection.

  3. To review the arc definition, tap Details.
  4. Enter the Antenna height or Target height, the value of the station to be staked out (if any), and any further details, such as horizontal and vertical offsets.
  5. Tap Start.
  6. Navigate to the point.

  7. When the point is within tolerance, tap Measure to measure the point.

    When using a Trimble SX12 scanning total station in TRK mode with the laser pointer enabled, the Stakeout screen shows the Mark point softkey instead of the Measure softkey. Tap Mark point to put the instrument into STD mode. The laser pointer stops flashing and moves to position itself at the EDM location. When you tap Accept to store the point, the instrument automatically returns to TRK mode and the laser pointer resumes flashing. To remeasure and update the stakeout deltas, tap Measure after you tap Mark point and before you tap Accept. For more information, see EDM settings.

  8. Tap Accept to store the point.
  9. If you selected the View before storage option, the staked deltas you selected in the Stakeout options screen are shown. Tap Store.

  10. The software returns to the navigation screen or, if you selected multiple items to stake out, the software returns to the Stake out items list.

Arc stakeout methods

Measure your position (1) relative to a defined arc (2).

Stake out points (1) on a defined arc at the station intervals (2) along the arc.

Stake out a point (1) perpendicular to a station (3) on a defined arc (2) and offset to the left or right by a horizontal distance (4).

The design elevation of the point is the same as the elevation of the arc at the selected station.

Measure your position relative to a slope (2) defined either side of a defined arc (1). Each slope can be defined with a different grade (3).

Use the Slope left field and the Slope right field to define the type of grade in one of the following ways:

  • horizontal and vertical distance
  • grade and slope distance
  • grade and horizontal distance

The software reports your position relative to the arc and the vertical distance as a cut (4) or a fill (5) to the slope.

Stake out a point (1) at a skew (2) from a station (3) on a defined arc (4) and offset to the left or right by a skew distance (5). The skew can be defined as a forward or backward delta angle to a line (6) at right angles to the arc being staked, or the skew can be defined by an azimuth. The diagram shows a point defined by a skew forward and offset to the right.

The elevation for the point can be defined by:

  • Slope from arc – the elevation is computed by a slope from the elevation of the arc at the entered station.
  • Delta from arc – the elevation is computed by a delta from the elevation of the arc at the entered station.
  • Key in – the elevation is keyed in.

If the arc has no elevation, the elevation for the point must be keyed in.

Stake out the Intersection point (1) of an arc (2).

Stake out the center point (1) of a defined arc (2).