Create Sample Lines - By Chainage Range Dialog Box

Use this dialog box to create sample lines along an alignment for a specified range of chainages.

General

Alignment

Displays the name of the currently selected alignment associated with the range of chainages.

Chainage Range

From Alignment Start

Specifies whether the chainage range starts at the beginning of the alignment (that is, at the chainage located at the beginning of the alignment):

• True: Begins the chainage range at the start of the alignment.
• False: Specifies the beginning chainage in the range. Enter or pick a beginning chainage.

Start Chainage

Specifies the beginning chainage in the range. Enter a chainage value directly or click to pick from the drawing. Available if From Alignment Start is False.

To Alignment End

Specifies whether the chainage range ends at the end of the alignment (that is, at the final chainage along the alignment):

• True: Ends the chainage range at the end of the alignment.
• False: Specifies the ending chainage in the range. Enter or pick an editing chainage.

End Chainage

Specifies the end chainage in the range. Enter a chainage value directly or click to pick from the drawing. Available if To Alignment End is False.

Left Swath Width

Snap To An Alignment

Specifies that the sample line extends out to an alignment at each chainage (rather than being a hard-coded width).

• True: Creates the left swath by snapping to a specified offset alignment at each chainage. If you specify True, then select the alignment to use from the Alignment list.
• False: Does not snap to an offset alignment. If you specify False, then use the Width setting to specify the swath width.

Alignment

Specifies the alignment to which the left swath is extended. Available if Snap To Alignment is True.

Note: Although all alignments in the current drawing are listed, do not select the parent alignment. The resulting length will be zero.

Width

Specifies the swath width to the left of the alignment, using the actual ground units. Enter a positive value in ground units. Available if Snap To Alignment is False.

Right Swath Width

Snap To An Alignment

Specifies that the sample line extends out to an alignment at each chainage (rather than being a hard-coded width).

• True: Creates the right swath by snapping to a specified offset alignment at each chainage. If you specify True, then select the alignment to use from the Alignment list.
• False: Does not snap to an offset alignment. If you specify False, then use the Width setting to specify the swath width.

Alignment

Specifies the alignment to which the right swath is extended. Available if Snap To Alignment is True.

Note: Although all alignments in the current drawing are listed, do not select the parent alignment. The resulting length will be zero.

Width

Specifies the swath width to the right of the alignment, using the actual ground units. Enter a positive value in ground units. Available if Snap To Alignment is False.

Sampling Increments

Use Sampling Increments

Specifies whether sample lines are created at incremental chainages along the alignment:

• True: Changes the default sample increments for either straights, curves, or transitions. For example, you may want to decrease the values for curves and/or transitions.
• False: Sample lines are not created at chainages along the alignment.

Increment Relative To

Specifies how the chainage range is incremented.

• Absolute Chainage: Increments the chaingages from chainage 0 of the alignment.
• Chainage Range Start: Increments the chainages from the start chainage of the alignment (which may not be 0) or from the chainage specified under Chainage Range as the Start Chainage .

Increment Along Straights

Specifies the sample increment distance along straights, using the actual ground units. Enter a positive value in ground units.

Increment Along Curves

Specifies the sample increment distance along curves, using the actual ground units. Enter a positive value in ground units.

Increment Along Transitions

Specifies the sample increment distance along transitions, using the actual ground units. Enter a positive value in ground units.

Note: Changing sampling increments can affect performance on rebuild. A shorter increment means more sampling chainages, and thus a larger drawing.

Additional Sample Controls

At Range Start

Specifies whether a sample line is created at the beginning of the specified range.

At Range End

Specifies whether a sample line is created at the end of the specified range.

At Horizontal Geometry Points

Specifies whether additional sample lines are created at horizontal geometry points, such as, at the start of a transition, or at a transition-curve point.

At Superelevation Critical Chainages

Specifies whether additional sample lines are created at superelevation critical chainages.