Delete a Vertex

Description

Delete a vertex from a line, alignment, polygon, shape (pipe) or terrain model.

Access

Modify / Delete Vertex

Requirements

Solve module

Controls
Control Description
Vertex Do one of the following:
  • Pick a vertex from the model view to automatically delete the vertex from an object.
  • Tentatively pick a vertex, until the correct object displays in the Attributes tool window.
Notes
  • Objects in the same location are picked using the following criteria:
    1. Layer draw order - Objects on layers drawn last are selected first.
    2. Object type - Line, alignment, polygon, terrain model, shape.
    3. Unique identifier - Objects created first are selected first.
  • If more than one object is using the vertex, or if vertices are very close, tentatively pick the vertex until the correct line, alignment, polygon, shape or terrain model is picked.
  • The vertex is deleted from the specified object only. The vertex is retained by all other objects using the vertex.
  • The vertex is deleted from the project when there are no remaining objects using the vertex.
  • The vertex is deleted from an alignment, only if it is the first or last vertex in the alignment.
  • If deleting a vertex results in less than the minimum vertices required to form the object, then the object is also deleted.
  • Vertices can be deleted from straights, arcs, transition curves, splines, polygons, shapes (pipes) and terrain models.
  • To delete an object, select the object then press Delete or click Delete
  • For alignments with a design standard, you can delete intersection points only. The curves in the alignment will be recomputed. If a curve does not display, a curve could not be computed within the constraints. On the Alignment tab, in the Properties group, click Horizontal Intersection Point to examine the curves at the intersection points.
Possible Errors
Error Description
Operation failed.
The update would break the geometry
.
  • You may have specified a polygons vertex, deleting the selected vertex will cause polygon edges to intersect, rendering the polygon invalid. Select a different vertex, or delete the vertices in a different order.
  • You may have specified a vertex in a transition curve or in a circular arc that is used for the curve geometry.
Related topics

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