Existing line staking is essentially the reverse process of line staking. Line staking is to measure and set the designed line on the ground, and measure and set the line according to the calculated line elements, length and azimuth. The existing line stakeout is to survey and map the detailed current situation of the completed line, and then calculate the starting point mileage, azimuth, length, starting point, end point coordinates and other elements of the line in reverse according to the surveying and mapping data, so as to modify or design a new one on this basis. line. The following will show you how to use the Qianxun position GNSS software to easily realize the existing line stakeout!
This function in the software is generally used to collect the center point of the line on site, and the center points are connected to form a polyline, and the parameters of each straight line can be checked in the line library, and the section can also be measured. Click [Measurement] -> [Stake Out Existing Lines] and select line stakeout, as shown in Figure 5.15-1.
Figure 5.15-1 Figure 5.15-2
Existing line staking steps:
(1) Enter the existing line library, set the starting line or import the line file.
(2) Select the target line in the line library, and click [OK] to enter the stakeout interface, as shown in Figure 5.15-1. Generates a normal at the center point, which is useful for measuring cross-sections. Generate a vertical line of the normal through the current point, which can assist in identifying the direction.
(3) Measure the cross section at the current point mileage according to the line mileage, line offset distance, horizontal distance and vertical distance in the lower status bar.
(4) Click to collect the coordinates of the current center point to collect cross-sectional data.
The above is all the content of the existing line stakeout, and the next issue will bring you the application skills of Qianxun position GNSS software in railway stakeout.
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