Nonio C is a program for modeling large topographic and cartographic surveys using triangles, contour lines, slope charts, color shading, sections, and three-dimensional views.
Terrain is modeled using a method of triangulation, a valuable alternative to methods based on the generation of an orthogonal grid, which does not often correspond well to real-life conditions. Two surfaces can be modeled simultaneously, allowing the comparison of the original terrain with the modified or of two different project phases.
A land model created with Nonio C may be exported to an architectural program, such as Interstudio's own Domus.Cad or others, where an architectural model may be placed directly on it. The reverse operation may also be performed: an archiectural model can be imported by Nonio C and placed on the land model.

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