Baseline and Region Parameters Dialog Box

Use this dialog box to specify new corridor region parameters, including baselines, regions, and controlling offsets

This dialog box is displayed when the Set Baseline and Region Parameters box is selected in the Create Corridor dialog box. You can also access this dialog box after creating a corridor by expanding the Corridors <corridor name> collection on the Prospector tab, right-clicking a <baseline name> and clicking Properties.

Expands all baseline categories.

Collapses all baseline categories.

Turns on all baselines.

Turns off all baselines.

Add Baseline

Adds another baseline to the corridor definition.

Set All Frequencies

Opens the Frequency to Apply Assemblies dialog box, where you can specify the increments at which assemblies are placed along straights, curves, transitions, and other geometry points.

Set All Targets

Opens the Target Mapping dialog box, where you can map targets from subassembly definitions to appropriate drawing object names for the entire corridor. If you subsequently add an assembly region that uses the same set (or subset) of targets, the mappings are automatically assigned.

Note: If targets are required and not set, messages are displayed in the Event Viewer. To display the Event Viewer, click GeneralUtilitiesEvent Viewer.

The properties table contains the following columns:

Name

Displays a tree listing all baselines, regions, and corresponding offset baselines.

Note: Offset baselines are displayed if the assembly is defined with assembly offsets.

The check boxes beside the baselines and regions specify whether to show (selected) or hide (cleared) the baselines or regions. If the check box is cleared, that section of corridor is not reprocessed when underlying elements (for example, alignments, subassemblies, or surfaces) change.

Note: The check boxes have a tri-state display. If only one of the regions is selected under a baseline, the check box is dimmed and unavailable.

Horizontal Baseline

Specifies the horizontal geometry for a baseline or offset baseline. Click this field to open the Select a Horizontal Baseline dialog box where you can select an alignment/profile or a feature line.

Note: For non-offset baselines, when you select a feature line, that feature line is also used as the Vertical Baseline.

Vertical Baseline

Specifies the vertical geometry for a baseline or offset baseline. The dialog box that is displayed when you click this field depends on whether the baseline is an offset baseline or not, and the type of baseline you specify for the Horizontal Baseline.

Baseline	Horizontal Baseline	Vertical Baseline
Non-offset	Alignment	Profile; this must be a profile that is associated with the horizontal baseline alignment
Non-offset	Feature Line	Not selectable; this is the same feature line as the horizontal baseline
Offset	Alignment	Alignment/Profile; the alignment and profile can be different than what is specified for the horizontal baseline
Offset	Feature Line	Feature Line; can be different than the horizontal baseline

Assembly

Opens the Select An Assembly dialog box where you can select an assembly for the corridor region.

Start Chainage

Specifies the start chainage for the region or controlling offset. By default, for the first region added to a baseline, this value is set to the start chainage of the baseline. If one or more corridor regions already exist, this value is set to the end chainage of last region. Enter a value or click to select a location in the drawing area.

End Chainage

Specifies the end chainage for the region or controlling offset. By default, for the first region added to a baseline, this value is set to the end chainage of the baseline. Enter a value or click to select a location in the drawing area.

Frequency

Specifies the frequency at which assemblies are placed for a given baseline or region. Click to open the Frequency to Apply Assemblies dialog box, where you can modify the chainage frequency and manually add chainages.

Target

Click to open the Target Mapping dialog box, where you can map targets from subassembly definitions to appropriate drawing object names for the region.

Overrides

This field is disabled when you are creating a corridor. For more information, see To View and Delete Overridden Corridor Chainages for a Region.

Lock Regions To

Specifies whether to lock the corridor regions to either the geometry or chainage of the parent alignment:

• Geometry Locking: Locks corridor regions to the alignment geometry. If the alignment is modified, the corridor region start and end chainages are updated to maintain the region location relative to the alignment geometry.
• Chainage Locking: Locks corridor region start and end chainages to the corresponding alignment chainages. If the alignment is modified, the corridor region start and end chainages are maintained, even if the region must move geometrically.