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Section from 3D drawing

Use this function for the following:

  • To present the cross-sections along a baseline from the '3D drawing'
  • To present the longitudinal section along a straight line from the '3D drawing'

Cross-sections from the 3D drawing

Each 3D Face entity is represented with a line in the resulting cross-section or longitudinal section. The non-graphical CAD properties of the line will be inherited from the source entity. All lines in the result will be draw to appropriate layers. It is possible to prefix the layer names. If the source entity is a 3D polyline or polyline with elevation, a point will be drawn to represent its location.

Note:

  • Ensure that PDMODE of AutoCAD is set to a value greater than 2

Procedure

Run the function form the following locations:

MOUS_ICO Toolbar: Not available from the Toolbar

MOUS_ICO Menu: Novapoint > Terrain Information > Section from 3D drawing

KEYB_ICO Command Line: Not available from the command line

The dialog Section from 3D drawing will pop up.

Using the radio buttons, choose 'Single Section' to present the longitudinal section or 'Sections along alignment' to present the cross-sections along the baseline.

Single Section

  1. Select the section line using 'Select section line'
  2. Treating the midpoint of the section line as reference, the offset to the end point on left and right sides are displayed as Start distance and End distance.
    • Section width is the width of the longitudinal section
    • Reduce the offset to the end point using Start Distance to reduce the section width symmetrically
  3. Layer prefix - define a prefix for layer names
  4. Click Next to open the dialog Draw Cross-Sections and define the output parameters

Note:

  • The section line has to be a single straight line (a line entity or polyline with only one line element)
  • The first point of the CAD entity will be the start point for calculations and presentation

Sections along alignment

  1. Select the baseline using the buttons Select, Browse, or Pick - the baseline can be:
    • an alignment/object from the terrain model - use Select
    • an ASCII file with the alignment data (*.TIT, *.LIN, *.DAT, *.INH, and *.LI) - use Browse
    • a line/polyline/arc or alignment from the current drawing - use Pick
  2. Define interval for cross-sections at Calculation Interval (m)
  3. Define the search width on left side at Left (m)
  4. Define the search width on right side at Right (m)
  5. Layer prefix - define a prefix for layer names
  6. Click Next to open the dialog Draw Cross-Sections and define the output parameters

Note:

  • The first point of the CAD entity will be the start point for calculations and presentation in case the baseline is a CAD entity

Output Parameters

The active Terrain model and the baseline/section line information can be viewed on this dialog.

  • Define the presentation settings and execute the function with 'Draw'
  • Use the button Back to change the input parameters (baseline/section line, parameters, etc.)

Cross section selection

This option is available if Sections along alignment is the choice at step 1. Define the first and last chainage between which, cross-sections are to be presented.

Drawing Settings

  • Define the insertion point for the longitudinal section or the first cross-section. Use the ellipse button to pick the insertion point from the drawing or key-in the coordinates at X and Y
  • Define the vertical spacing between the cross-sections. This option is available if Sections along alignment is the choice.
  • Drawing Style Settings gives you the cross-section drawing style

Tip:

  • Negative spacing will present the cross-sections from top to bottom

3D Drawing

  • Polylines with elevations
  • 3D Polylines
  • 3D faces
  • Surfaces
  • Solids
  • Blocks with 3D entities
Last modified: 2012/10/22 12:38 by camilla