Command Description

The Slope-Slope Intersection command enables you to create new 3D lines at the intersection of two slopes defined by two pairs of lines, with or without vertical or perpendicular offsets. This tool is great for creating subgrade strings at batter intersections. 

Line 1:

  • Reference Line – The first line for the first slope element (typically defined by two lines or one line and a slope value). For example, if the first slope element is defined by the road centreline and the edge of pavement, you can pick the edge of pavement here and then the road centreline as the second line of the pair. Option to change the selection highlight colour and to select a line from Reference files.
  • Use another line for slope – If you want to use a second line to define the slope, check this box. If, however you want to enter a slope value from the first line you selected leave this box unchecked.
    • Reference Line – If you check the box, select the second line for the first pair of lines that will be used to define the first of two slope surfaces for the computation. Option to change the selection highlight colour and to select a line from Reference files.
    • Slope – If unchecked, you can now enter a slope value from the reference line to define the first of two slope surfaces.
  • Vertical Offset:
    • If you do not check the box, you can enter a vertical offset to be applied to the slope between reference line 1 and 2.
    • If you check the box, you can 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 lines.
  • Check the Create offset lines if you want lines computed at the offset location for the source lines.

Line 2:

  • The settings for Line 2 are the same process as line 1 but for the second slope to be used in the intersection.

Intersected Line:

  • Name – Name for the new computed lines.
  • Layer – Select or create a Layer for the new line to be placed.

Chainage Reference:

  • Alignment - Select the alignment that you wish to use for the computation of chainage intervals on which to calculate the offset lines. You will be computing the offset line locations perpendicular to the chosen alignment and using it for the chainage interval. If ‘None’ is selected, then the alignment used will be the first reference line from the line 1 selection.
  • Sampling Distance – Enter the distance. 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.
  • Beg – Enter an optional start chainage.
  • End – Enter an optional end chainage.
  • Do either of the following:
    • Click Apply to create line and keep the Slope-Slope Intersection command pane open.
    • Click Close to end and close the Slope-Slope Intersection command pane.

Note: This command is licenced to Survey Intermediate and above and does not require an ANZ Toolbox licence.

Example: (Typical Cross Section)

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