4.3.3.4. Alignments
 
With the setting out of alignments lines can be translated into the locality. To this end, a straight line definition is called for. When the straight line has been defined, new measurement values are displayed as local coordinates in relation to the straight line. 
 
Setting Out Lines with GPS:
 
After the starting and end points of the alignment have been entered, the setting out parameters are calculated.
 
The values in the fields LE and QE designate the longitudinal and transverse deviation from the alignment in relation to the starting point. The deviation of the current position from the point to be staked out is represented in the graphic screen by an error triangle. For TPS receivers, a compass in the upper left-hand corner shows the difference between True Heading and azimuth. The starting and end points can be entered either via the point number or by clicking the point in the graphic. The point can be selected from a coordinate list using the >> buttons.
 
The button <Option> allows further alignment settings to be made. Via the option Fiducial Point a compulsory point can be defined within the two points. The option Perpendicular Point sets the alignment perpendicular to the line between the starting and end points.
 
When you want to save the coordinates of the point to be staked out, press the <Save>-button.
 
In the menu Initial > Constants > GPS you can deactivate the function Auto-Zoom. In this manner, the graphic section you have selected always remains visible in the display of GART-2000® CE, whereas an activated Auto-Zoom during the measurement delivers a tracking view of the current position.
 
Pressing the button <Plot> changes the view into a polar representation of the setting-out situation. With this representation and thanks to orientation by compass, the point to be staked out can be located more easily.
 
Information on left side on screen denotes:
 

dE

difference Easting

dN

difference Northing

dZ

difference of the Heights

dS

linear deviation

 
The other buttons correspond to the Measurement dialog.
 
Setting Out Lines with Total Station:
 
The measurement can be triggered by various buttons. <All> triggers an overall measurement, <BuildRef.> and <Ex-c> trigger a measurement to a reflector. When using the <Ex-centers> button, the amount of horizontal eccentricity is queried, and the amount of spatial eccentricity is queried when <Ex-c> is used.
 
The button "<>" switches into the control mode in the case of automatic tachymeters.
 
Deviations are shown in following data:
 

X

distance from starting point of line 

Y

side distance of line

S1

Distance of the last-but-one measured point (P1) from the intersection of the alignment with the straight lines P1-P2 (last measured point).

S2

Distance of the last measured point (P2) from the intersection of the alignment with the straight lines P1-P2.

 
The sign of the line segments S1 and S2 always applies in the direction from P1 to P2.
 
On pressing the button <Save MV>, the Measurement Registration dialog appears automatically.
 
With <X> the dialog can be quitted.
 

 

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