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Special Cases

In Gemini Terrain, there are special cases where we don't have a terrain model but still want to visualize data in the longitudinal profile editing window. The most common cases are:

  • 3D line definition (points in the line have elevation)
  • 2D line definition with vertical curvature

3D Line Definition

A typical example of using a 3D line definition is when you have a utility trench with measured X-, Y-, and Z-coordinates. To visualize this in the longitudinal profile view, follow the procedure below.

Instructions

Procedure

  1. Import the coordinates to an application layer
  2. Activate the Planning, Design and Construction Toolset
  3. Select Horizontal Curvature (Line Definition) in the toolbox
  4. Enter a filename and click OK
  5. Answer Yes to create a new file
  6. Check the 3D Line option in the dialog ([Ctrl]+[D] to open it), snap to the points, and save the line definition
  7. Select the line definition and choose the function Generate Longitudinal Profile from the context menu
  8. Click the Generate Longitudinal Profile button
  9. The 3D line now appears in the longitudinal profile grid

2D Line Definition with Vertical Curvature

When you have a .tit file for the horizontal curvature and a .nyl file for the vertical curvature, you can visualize this data in the longitudinal profile view.

Instructions

Procedure

  1. Import road data (typically .tit and .nyl) to an SFI model
  2. Activate the Planning, Design and Construction Toolset
  3. Select the line definition and choose the function Generate Longitudinal Profile from the context menu
  4. Click the Generate Longitudinal Profile button
  5. The vertical curvature now appears in the longitudinal profile grid

Note

The procedure for creating presentation drawings for 3D line definitions and 2D line definitions with vertical curvature is the same as for other longitudinal profiles.