Spectra-precision Survey Pro v4.5 Ranger User Manual Manual de usuario descargar pdf (Pagina 288)

User’s Manual – GPS Mode

278

Adjust with Projection – Results

The Adjust with Projection Results screen is

used to preview the results of the adjustment

before anything is applied to the job file. The

default view is to list the action and results only

for points that will be updated in the

adjustment. You can tap Show all points to

update the list to show the reason unchanged

points are not adjusted.

1. Review the results.

2. Tap Apply to update the job.

Projection Calculator

You can use the Projection Calculator to calculate combined scale

factor for scaling conventional distance measurements to the

mapping plane. You can also use the Projection Calculator

calculate meridian convergence for reducing geodetic azimuths (such

as a sun shot) to grid bearings.

Scale Factor Calculator

1. Go to the Survey > Projection Calculator screen.

2. Choose a point on the mapping plane for scale computation in the

Select Point control. Tap Solve Scale>.

3. Enter a height to compute Ellipsoid Scale Factor. This calculation

uses the height of the point above the ellipsoid to correct for the

effect of the terrain above the reference surface.

4. Tap Solve> to calculate the combined scale factor with the

selected values. The combined scale factor is displayed in the

Ground to Grid box. The inverse combined factor is displayed in

the Grid to Ground box.

5. Tap Accept when you are done. Both numbers are saved in the

Past Results list so you can use them in other calculations.

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Spectra-precision Survey Pro v4.5 Ranger User Manual Manual de usuario Pagina 288