Offset Slope Command

D_OffsetSlope_600ppi   Offset Slope

Command Licensing and Default Menu Location

  • The Offset Slope command is part of the RPS Modeling Toolbox
  • The command is located on the Modeling macros menu ribbon
  • The command is located in the Corridor menu group

Command Description

Create a new 3D line at an offset and elevation difference to a selected pair of lines where the elevation of the new line is computed by extending the slope defined by the selected pair of lines and applying the elevation difference required. This tool is great for extending pavement or subgrade surfaces where the pavement surface is defined by imported 3D string (lines) data.

Command Interface Description

The Offset Slope command dialog looks as follows

Line 1:

Reference Line:
Select the line from which you want to extend the slope and from which you want to enter the offset distance. For example if you are offsetting the edge of pavement by 6’ then you would select the edge of pavement line here.

Enter the offset distance that you require from the reference line. The offset distance is a horizontal offset distance from the reference line.

Use another line for slope checkbox:
Check this checkbox if you wish to use a second reference line to determine the slope value for the projected offset line.

If you do not check this checkbox you can manually enter a single slope % or ratio value to use. If you enter a manual slope value enter as -2% or -3:1 etc. and the value will be converted to a slope ratio.

Reference Line:
If you check the check box then select the second line that you wish to use e.g. the road centerline.

Vertical Offset Checkbox:
If you leave the checkbox unchecked you can enter a vertical offset to be applied to the source line 1 and 2 as well as the computed offset line.

If you check the checkbox you are going to enter a perpendicular offset to the slope between line 1 and 2. While the elevation offset is computed perpendicularly to the slope between the two reference lines it is applied vertically below the source and offset lines.

Enter the vertical or perpendicular offset distance. Enter offsets above the source strings as positive offsets, and offsets below the source strings as negative values.

Offset Line:

Input the name that you want to use for the computed offset line(s). Enter offsets to the right as positive values and offsets to the left as negative values.

Select the layer on which you want to place the computed offset line(s)

Station Reference:

Select the alignment that you wish to use for the computation of station intervals on which to calculate the offset lines. You will be computing the offset line locations using a station interval.

Sampling Distance:
Enter the station interval that you wish to use as the sampling interval for the offset line computations. If you enter a value of 0 here the computations will use the intervals between the nodes of the source lines. If you received the strings from a third party software via e.g. LandXML or CAD format data, then we recommend that you use the source data sampling interval so that your computation locations match the computation locations of the source strings, so as to not incur any errors due to chording of the source string data.

If you only wish to compute the offset lines over a specified station range, you can select a beginning and end station for the computations e.g. just for a fill area or just for a cut area etc. Enter or select the beginning station value.

If you only wish to compute the offset lines over a specified station range, you can select a beginning and end station for the computations e.g. just for a fill area or just for a cut area etc. Enter or select the end station value.

When you tap apply, the offset lines will be created and the command will ready itself for another selection set and repeat process execution. If you do not want to make a second selection and repeat the process tap Close to finish the process.

Closes the command without further execution.

Video Demonstration

The following video shows how to utilize the Offset Slope command

Use Case Videos

The following videos show the use of the Offset Slope command in a work process context

Feedback and Enhancement Requests

If you would like to provide feedback on the use of the Offset Slope command or to request enhancements or improvements to the command please Click Here