Edit the vertex elevations of feature lines, survey figures, and parcel lines with the Grading Elevation Editor.
Use the Grading Elevation Editor to edit feature line elevations in a tabular dialog box. You can also assign an elevation from an existing surface.
Changes you make in the editor dynamically change the elevation in the drawing.
Within the editor, each vertex is displayed on its own row, and is marked with a triangle or circle.
When you click a row, a marker is displayed in the drawing, displaying the vertex that you are on.
- 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 Feature Line Site Properties. - Circles
mark the elevation change points. Insert a new elevation point by using the Insert Elevation Point icon in the Grading Elevation Editor. - Grade arrows display at segment midpoints (pointing downhill) to indicate feature line flow directions and to display the segment that is being edited when a single row is selected.
is displayed with the icon for that row.When two features, such as feature lines, lot lines or survey figures cross and neither feature has a geometry point at that location, a split point is created. You cannot edit this point directly, as it is controlled by the grades of the two crossing segments which must have the same elevation at the crossing point. If the two elevations are different, a grade break is inserted into one to match the elevation of the other.
You can assign a priority to feature line styles so that when two feature lines with different styles cross, the one with the higher priority will set the elevation. Feature lines without a style have the lowest priority. Use the Options tab in the Feature Line Site Properties dialog box to set the feature line style priority.
If two feature lines have the same style or no style, then the feature line that is modified last becomes dominant, causing the other feature line to break at that point. To control the elevation at that point, use the Insert PI command to create a vertex at the split point.
Tutorial Exercise: Editing the Grading Elevation
To edit a feature line, using the Grading Elevation Editor
- Click Modify tab
Edit Elevations panelElevation Editor
. - Select the feature line or an other object.
- Change the elevation in the Grading Elevation Editor dialog box.
The Elevations From Surface option is unavailable if there are no surfaces in the drawing. If there is only one surface, that surface is automatically used to assign the elevation. If there is more then one surface, you are prompted to select the desired surface.
If no feature line rows are selected, the elevation of all points are updated. If the feature line is off of the surface, a warning message displays. If some elevations are updated, but one or more points are off of the surface, a message displays, indicating the number of points that could not be assigned elevations.
The feature line is updated in the drawing, and the grading is adjusted.