Coordinate System Settings

The parameters for adjustment computations can either be set in the File tab under Info and Settings or from inside the Adjustment ribbon bar.

File

Adjustment

Changes are stored with the project and applied to all future adjustment runs.

To set the adjustment parameters back to the default values:

Go to the File tab and select the Defaults option in the Adjustment Parameters section under Info & Settings.

File

Defaults

Adjustment Parameters

Info & Settings

Coordinate System

Coordinate System

Select WGS84 if you want to adjust your observations in the WGS84 system.
Select Local Geodetic if you have a local coordinate system attached to your project and you want to adjust the observations in the local system of your Control points.

The transformation used with your local coordinate system has to be either a Classic 3D or None for this option to become active.

Classic 3D

None

Read more in the topic "Status Bar" on how to attach a local coordinate system to a project.

Select Local Grid if you want to adjust pure TPS observations in a local grid system. In this case, no information on the local ellipsoid is necessary.

Local Geodetic

combined

Height Mode

Height Mode

Depending on the selected height mode, the adjusted coordinates have ellipsoidal or orthometric heights:

Select Ellipsoidal if you want to adjust your observations with ellipsoidal heights.
Select Orthometric if you want to adjust your observations with orthometric heights.

If for your Control points orthometric heights are available and a geoid model is included in the coordinate system to be used with the project then:

Control

Run the adjustment with setting the height mode to ellipsoidal.

ellipsoidal

After the adjustment, the geoid separations are applied again to get the orthometric heights of the adjusted coordinates.

Parameters

Parameters

In order transform observations four parameters are required: three rotations about each axis and a scale factor. These parameters can either be pre-defined and used as such in the adjustment or you can make the adjustment compute the parameters.

four

Select Compute if you want the adjustment to compute the parameters independent of the parameters given by the attached coordinate system.
Select Use if you want your observations to be adjusted using the parameters as defined here. This does not have any influence on the parameters given by the attached coordinate system.

compute