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Nonio C
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Support
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- Terrain model calculation
Nonio C FAQs
How does DXF import work in Nonio C?
Nonio C imports single points and polygons (in DXF Polyline), which it inserts as points to eventually be united by breaklines. It does not import other elements, such as lines, text, circles, etc. The primary use of DXF importation in Nonio C is to import contour lines from maps. If you want to import a drawing for other purposes (such as to serve as the base document for a survey project), it's better to import the document first to another program, for example DigiCad 3D, then to Nonio C using Copy and Paste or Drag and Drop.
How does grahic import work in Nonio C?
Nonio C imports graphic images in several formats. The PICT import command uses QuickTime and can import all the graphic formats handled by the installed QuickTime Other methods to import an image in Nonio C are Copy and Past and Drag & Drop.
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How can imported images be used?
Imported immages can be used for a number of objectives, among which some are listed below:
- Digitalization of a map with contour lines
- Superimposing a design on the survey
- Superimposing a survey drawing on an aerial photo
- Use of a design as a guide for infill or excavation
- Comparison of the terrain model with the map
- Comparison of the terrain model with map of property lines
How does Nonio C calculates the terrain model?
Nonio C constructs a mathematical surface connecting points with line segments to construct triangles.
The generation of triangles is also regulated by the maximum distance for triangulation entered in the Preferences dialog box, which requires the program to search for and construct triangles only among points falling between the set distance.
For any number of points, there are several possibile ways in which they may be joined by triangulation. If the general guidelines given above are followed and a reasonable maximum distance for triangulation set, the generated model should represent closely the actual terrain
conditions.
When there are certain discontinuities in the surface, a more detailed modeling process is required.
In these situations, connections can be somewhat ambiguous, even for a simple case involving only four points.
If automatic triangulation is used in situations like the one above, it can cause erratic results. Nonio C offers the user the ability to impose breaklines (representing lines of discontinuity, such as ditches, ridges, or streets) from which the triangulation can then be completed automatically.
The user can locally correct the automatic triangulation and Nonio C recalculate the modified model immediately and automatically.
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