Import known lines
Import known lines command starts the import of control measurements that have been measured on linear paint markings. The import results in tie lines of the type Known line which provide a partial xy control.
The control measurements have to be stored in a text file where each line includes the separated x, y, and z coordinates for one control point.
The command requires that a project is loaded in TerraScan where the laser data provides the input for placing the tie lines.
To import control measurements as known lines:
1. (Optional) Select a vector element which defines the direction in which paint markings run if you want to use the automatic tie line placement mode.
2. Select Import known lines command from the File pulldown menu.
This opens the Import Known Lines dialog:
Setting |
Effect |
|---|---|
Entry mode |
Defines how tie lines for control measurements are placed: •Manual - all positions are digitized manually. •Auto line search - the software places the tie lines automatically. |
Line length |
Length of a tie line that the software places automatically. This is only active if Entry mode is set to Auto line search. |
Angle within |
Maximum angle difference between observed tie line and selected vector element. This is only active if Entry mode is set to Auto line search. |
3. Select settings and click OK.
This opens another dialog for selecting the text file with control measurement coordinates.
4. Select the text file and click Open.
If the entry mode is Manual, the control measurements are added to the tie line list in the Tie lines window. Continue with placing the tie line locations manually.
If the entry mode is Auto line search, the software tries to place the tie lines automatically at the location of the control measurements. Continue with checking the tie lines and placing tie lines manually where the automatic line search has failed.
