Traverse calculation

• The function Traverse calculation is used to calculate and adjust a traverse measured with a total station directly in the field.

Calculate a traverse

• Open the COGO page.

• Select Traverse calculation.

  

• Select the traverse starting station from the list. Tap on + to add the starting station to the list.

  

• As soon as the first station is added, the software retrieves the list of stations connected to it. If multiple stations are available, select the next station and press +. If only one station is connected, it is added automatically to the list below. Repeat this process until all stations belonging to the traverse are included in the list.

  

• Press Next when the traverse has been created.

  

• The following page allows to select the calculation method and how to distribute the error related to angular error, linear error and elevation error.

  • Tolerance calculation: formula used to calculate the tolerance. The tolerance can be a fixed value or depending on the number of stations.

  • Coefficient value: the value of the coefficient used in the formula to calculate the tolerance.

  • Fixed value: the fixed value for the tolerance.

  • Distribution mode: how the error is distributed.

• Press Calculate to calculate the traverse.

• The software shows the traverse results.

  

• Traverse data: general information regarding the traverse.

  • Traverse type: the type of traverse depending on its geometry.

  • Traverse length: the length of the traverse.

  • Vertexes count: the number of stations in the traverse.

• Linear errors before angle balance: the linear errors before the angle balance has been executed.

  • Linear error: the software shows the calculated linear error and the tolerance as defined in the previous page.

  • Closure precision: the precision of the traverse closure.

• Angular errors: the angular errors calculated.

  • Angular error: the software shows the calculated angular error and the tolerance as defined in the previous page.

  • Adjusting each vertex: the adjust value for each vertex.

• Linear errors after angle balance: the linear errors after the angle balance has been executed.

  • Linear error: the software shows the calculated linear error after angle balance and the tolerance as defined in the previous page.

  • Closure precision: the precision of the traverse closure.

  • Elevation error: the calculated elevation error and the tolerance as defined in the previous page.

• Press Report to generate a calculation report and export it in the most common formats (csv, excel, pdf).

  

• Press Next to save the data.

  

  • Backup job and overwrite data: the current job is saved in a backup file. Stations and measurements are updated with the new positions resulting from the traverse calculation in the current job.

  • Overwrite data: stations and measurements are updated with the new positions resulting from the traverse calculation.

• Select Adjust traverse to save the data.

Supported traverse types

Closed-loop

• The closed-loop traverse has the final measurement, from the last station to the first station and a measurement from the first station to last station.

• All stations measure the previous and next station in the traverse.

• Closure errors are computed and distributed along the stations; first station remains on the originai position.

• Screenshot below shows an example in X-PAD.

  

Closed traverse

• The closed traverse has the initial and last station as known coordinates; the two stations have an orientation to another known point. The coordinates of the first and last station are available in the Reference points list.

• It is available a measurement from the first station to a known orientation point. The known orientation point coordinate is available in the Reference points list.

• It is available a measurement from the last station to a known orientation point. The known orientation point coordinate is available in the Reference points list.

• Closure errors are computed and distributed along the internal stations; first and last station remains on the originai position.

• All stations measure the previous and next station in the traverse.

  

• Screenshot below shows an example in X-PAD.

  

Open traverse

• The open traverse has the initial and last station as known coordinates. The coordinates of the first and last station are available in the Reference points list.

• All stations measure the previous and next station in the traverse.

• Closure errors are computed and distributed along the internal stations; first station and last remains on the originai position.

• Screenshot below shows an example in X-PAD.