Generating a report on the exterior orientation

You can determine the accuracy of the exterior orientation (EO) by comparing the residual errors on the Exterior Orientation tab and the Point tab. If the GPS or INS data for an image appears unacceptable, you can remove it from the project, or you can enter large estimated-error values for it to avoid adversely affecting the math-model solution.

If the residual errors in the Res XY, Res X, Res Y, Res Z, Res Omega, Res Phi, and Res Kappa columns are exactly the same as the estimated errors you entered in the eX, eY, eZ, eOmega, ePhi, and eKappa columns on the Import Exterior Orientation Data From Text File window, it may mean that your EO conflicts with your ground control.

The estimated errors constrain how much the EO can be adjusted in the math-model solution. To display the actual residual errors for x, y, z, omega, phi, and kappa, increase the estimated errors in the eX, eY, eZ, eOmega, ePhi, and eKappa columns until they no longer match those in the Res XY, Res X, Res Y, Res Z, Res Omega, Res Phi, and Res Kappa columns.

To generate the EO report

On the Exterior Orientation tab of the Residual Errors window, under Residual Units, select the unit you want displayed in the report:
- When the file expresses the angles in degrees, click Degrees.
  When a circle is divided along its radius into 360 equal parts, a degree is the angle between two adjacent radii measured at the center of the circle.
- When the file expresses the angles in radians, click Radian.
  A radian is a unit used to measure angles where 2 pi radians equals the 360 degrees in a circle. Therefore, one radian equals approximately 57.29577951 degrees.
- When the file expresses the angles in grads, click Grads.
  A grad is a unit used to measure angles where 400 grads equals the 360 degrees in a circle. Therefore, a 90-degree right angle equals 100 grads.
- When the file expresses the angles in degrees minutes seconds (DMS), click DMS.
  DMS is a unit used to measure angles where a degree is divided into equal parts. A circle contains 360 degrees. Each degree is divided into 60 sections, or minutes. Each minute is also divided into 60 sections, or seconds. Therefore, each angle is described by a number of degrees, minutes, and seconds.
To edit the EO of an image, in the Image ID column, click the image you want to edit, and then click Edit Exterior Orientation.
The Manually Edit Exterior Orientation Data window appears, in which you can manually edit the EO data.
Click Compute Model, and then click Print to File.