# To measure continuous topo points

Use the Continuous topo measurement method to measure points continuously, for example a line of points at a fixed interval. Measuring points along a feature requires following the feature closely with the pole tip as you move along the feature.

You can also use the Continuous topo measurement method to store depths measured using an echo sounder. For more information, see Echo sounders.

To start Continuous topo measurements:

1. Tap and select Measure / Continuous topo.

2. Enter the Start point name. The point name increments automatically.

3. If required, enter a value in the Antenna height field.
4. To add a vertical offset to the measured points, tap Options. Select Add vertical offset and then in the Continuous topo screen enter a value in the Vertical offset field.
5. Select the method using the steps below.

To measure continuous topo points without stopping

1. Select the Method.

   A point is stored when one of these predefined events occurs:

   - the time interval has elapsed (Fixed time method)
   - the distance has been exceeded (Fixed distance method)
   - the time interval has elapsed and/or the distance has been exceeded (Time and distance or Time or distance method)

   For a postprocessed survey, you must use the Fixed time continuous method. By default the time interval is set to the same value as the logging interval configured in the Rover options screen of the postprocessed survey style.

2. Enter a value in the Distance field and/or the Time interval field, depending on which method you are using.
3. Tap Start. Data starts recording.
4. Move along the feature to be surveyed, following the feature closely with the pole tip as you move along the feature.

   If you are using IMU tilt compensation and the IMU is aligned, the status bar shows You can tilt the pole as required as you move along the feature.

   If you are using GNSS only, the status bar shows . You must keep the pole vertical as you move along the feature. If Tilt warnings are enabled, a point is not stored until the receiver is within the defined tilt tolerance.

5. Points are stored automatically when the preset occupation time and precisions have been reached. To store a position before the predefined conditions have been met, tap Store.

6. To stop measuring continuous points, tap End.

To measure continuous topo points using the stop and go method

1. In the Method field, select Stop and go.

2. In the Stop time field, enter the period of time the target must be stationary before the instrument starts to measure the point.

   The target is deemed to be stationary when its velocity is less than 5 cm per second.

3. Enter a value in the Distance field for the minimum distance between points.
4. Tap Start. Data starts recording.
5. Move along the feature to be surveyed, following the feature closely with the pole tip as you move along the feature.

   If you are using IMU tilt compensation and the IMU is aligned, the status bar shows You can tilt the pole as required as you move along the feature.

   If you are using GNSS only, the status bar shows . You must keep the pole vertical as you move along the feature. If Tilt warnings are enabled, a point is not stored until the receiver is within the defined tilt tolerance.

6. Points are stored automatically when the stop time and distance settings have been met. To store a position before the predefined conditions have been met, tap Store.

7. To stop measuring continuous points, tap End.