Spectra-precision Survey Pro v4.5 Ranger User Manual Manual de usuario descargar pdf (Pagina 135)

Other Conventional Surveying Tutorials

125

Resection

The Resection screen allows you to occupy an unknown point and

compute its coordinates by shooting two to seven known points.

The accuracy of the computed occupy point depends on the following

factors:

• The number of known points that are shot

• The accuracy of the known point’s coordinates

• The position of the known points relative to the total station

To better explain this last statement, when planning the location of

the total station and the known points that you will shoot, try to

avoid a situation where the horizontal angle turned between two

known points is either near 0° or near 180°. Both of these scenarios

create large errors in the computed point when a small error is made

in measuring the horizontal angle. This is particularly true when

performing a two-point resection.

Performing a Resection

Setup the total station over the location where you want to compute

coordinates. Be sure that at least two known points are in view from

this location. (The known points must already be stored in the

current job.)

1. Tap .Survey , Resection .

2. Enter the occupy point name that you want

to compute in the Store Pt field.

3. Enter the number of known points that are

in view that you will shoot in the Total

Resect Points to Shoot field. You must

shoot at least two and no more than seven.

4. Enter the number of shots (forward and

reverse) that you want to take to each

known point in the Shots per Resect Point

1 2 ... 130 131 132 133 134 135 136 137 138 139 140 ... 338 339

Sin comentarios

Spectra-precision Survey Pro v4.5 Ranger User Manual Manual de usuario Pagina 135