Grading Elevation Editor Dialog Box

Use this dialog box to edit the elevations and grades for feature line, lot line, or survey figure segments. You cannot change the values of the stations or segment lengths.

Use the Shift or Ctrl key to select multiple rows for editing.

Icons

Select Line

Selects a feature line, lot line, or survey figure for editing.

Zoom To

Zooms the drawing display to the selected point of intersection (PI) or elevation point.

Quick Profile

Creates a quick profile of the feature line.

Raise/Lower

Adjusts the elevation of the points either upward or downward. Click the Raise/Lower and then enter the amount in the text box.

If no rows are selected, all rows are adjusted by the same amount. If rows are selected, the first selected point is adjusted to the specified elevation, then all the remaining selected rows are adjusted by the difference between the first point's previous elevation and its new elevation. For example, if the first point selected is at 3ft and you enter 10ft, the elevation of the first point is moved to be at 10ft, and 7ft is added on to the other points that are selected.

Raise Incrementally

Adjusts the elevations of all points upward by the increment value. If no rows are selected, the option adjusts all points, otherwise it adjusts the points only for the selected rows.

Lower Incrementally

Adjusts the elevations of all points downward by the increment value. If no rows are selected, it adjusts all points, otherwise it adjusts the points for the selected rows.

Set Increment

Specifies the value to be used by the Raise and Lower commands. Enter the value.

Flatten Elevations

Specifies that the elevations of all selected rows are flattened to either the same elevation as the first row in the selection, or a constant grade from the start elevation to the end elevation of the selection. Click to open the Flatten dialog box.

Insert Elevation Point

Inserts an elevation point between the start and end stations of the footprint, creating an intermediate elevation point.

Delete Elevation Point

Deletes an elevation point between the start and end stations of the footprint. You can delete only a single-row selection of intermediate elevation points.

Elevations From Surface

Opens the Set Elevations From Surface dialog box so you can set the feature line elevations from a surface in the drawing. This option is disabled if the drawing has no surfaces.

• If the Relative Elevation to Surface check box is selected, the elevations of all points are updated regardless of whether rows are selected in the Grading Elevation Editor.

  Any feature line point that is off the surface keeps its existing elevation and it is set to be absolute.

• If the Relative Elevation to Surface check box is cleared, and no rows are selected in the Grading Elevation Editor, the elevations of all points are updated.
  If rows are selected in the in the Grading Elevation Editor, and the Relative Elevation to Surface check box is cleared, the update behavior depends upon whether the Insert Intermediate Grade Break Points check box is selected or cleared.

  • If Insert Intermediate Grade Break Points check box is also cleared, then just the selected rows are updated.
  • If the Insert Intermediate Grade Break Points check box is selected, the elevations of all points are updated, regardless of whether rows are selected.

If the feature line is off the surface, a warning message is displayed. If some elevations are updated, but one or more points are off the surface, a message is displayed indicating the number of points off the surface that could not be assigned elevations. Any feature line point that is off the surface keeps its existing elevation.

Reverse

Changes the direction of feature lines. Updates the editor so that the order of points is reversed. This command affects the labeling and stationing of feature lines.

Show Grade Breaks Only

Displays only the feature line start/end points and any grade breaks in between. This option simplifies the editing process by allowing elevation edits to span multiple points. By default, the table displays all feature line points.

Unselect All Rows

Clears any selected rows so that the Raise, Lower, and Flatten commands affect the entire length of the footprint.

Relative To Surface

Specifies a surface to which the feature line elevations will be relative.

Specifying a surface in this list displays the Elevation (Relative) column and the Elevation Derived From columns if they were not previously displayed. If you select <none>, those columns are hidden.

Note: Relative elevation options are also supported when editing parcel lines in the Grading Elevation Editor, but not when editing survey figures or extracted feature lines that are dynamic to parent corridors or to parent alignments/profiles.

If the feature line was not originally created relative to a surface, after you select a surface in this list, use the drop-down selection in the Elevation Derived From column to select Relative To Surface for the feature line points that will be relative to the surface. You can then also enter an elevation in the Elevation (Relative) column to offset the points above or below the surface.

Selecting a surface and setting points relative to the surface has the following effects, depending on how the feature line was initially created:

• If the feature line was initially created relative to a surface, selecting a different surface from the Relative To Surface list will update the Elevation (Actual) values. If values are specified in Elevation (Relative) column, they are preserved and applied to the surface elevations to result in the actual elevations.

  For example, the following feature line was created 0.500m relative to surface EG.

  

  If the surface is changed to First Street, the values in the Elevation (Relative) column are applied now to First Street surface elevations to result in the new elevations in the Elevation (Actual) column.

  

• If the feature line was initially created at a fixed elevation or grade, after setting the feature line to be relative to a surface, the Elevation (Relative) column will display the difference between the Elevation (Actual) and the specified surface at that point. The value in the Elevation (Actual) is not changed.

  For example, the following feature line was created with its first point at a fixed elevation of 10.000m and the next point at a grade of 2.00%. It is not relative to a surface.

  

  If it is changed to be relative to surface EG, the actual elevation stays the same and the Elevation (Relative) column shows the elevational difference between the feature line and the surface.

  

  Note: In this case, if you want to reset the actual elevations to the surface elevations, you can use the Elevations From Surface option described above.

For more information on this behavior, see About Relative Feature Lines.

Columns

Symbol

• Green triangles mark the points that represent the major horizontal geometry points. For example, when you create a feature line, all vertices are shown as triangles. If you insert points of intersection (PI), they are also shown as triangles.
• White triangles indicate split points, where two feature lines cross although neither has a geometry point at that location. You cannot directly edit the elevation of these points. For more information, see "Split points" below.
  Note: The gray point icons also represent read-only objects, such as daylight lines and dynamically linked feature lines.
• Circles mark the elevation change points. Insert a new elevation point by using the Insert Elevation Point icon in the Grading Elevation Editor.
Note: When a vertex is a shared point with another intersecting feature line, a small + symbol is displayed with the icon for that row.

Station

Identifies the point that starts the current segment.

Elevation (Relative)

Specifies the positive or negative relative elevation of the point identified by the Station. This elevation is relative to the surface that is specified in the Relative To Surface drop-down list.

For example, if the relative elevation is 0.5 m, then the point is 0.5 m above the specified surface.

Note: If no surface is specified in the Relative To Surface drop-down list, then the Elevation (Relative) column is hidden.

Elevation (Actual)

Specifies the actual elevation of the point identified by the Station.

Length

Displays the length of the current segment.

Grade Ahead

Specifies the end elevation of the current segment in the forward direction. Modifying this grade will change the elevation of the segment. This is the elevation of the next Station point in the next row of the grid.

Note: To edit the grade of multiple rows, select the desired rows and edit the grade of one of the selected rows. The new grade will be applied to all selected rows.

Grade Back

Specifies the grade of the current segment from its end to start. Modifying this grade will change the start elevation of the segment, which is the point at the beginning of the current row.

Elevation Derived From

Specifies whether the elevation is absolute or is relative to the surface specified in the Relative To Surface drop-down list.

Note: Selecting a surface from the Relative To Surface list does not automatically make all the feature line points relative to that surface. You must also ensure that the Relative To Surface option in the Elevation Derived From list is selected for each point that you want to be relative. You can then also enter an elevation in the Elevation (Relative) column to offset the points above or below the surface.

Note: If no surface is specified in the Relative To Surface drop-down list, then the Elevation Derived From column is hidden.