Lecture
This lecture covers the study of surfaces with variable curvature, including surfaces with constant curvature, gothic surfaces, and the development of surfaces. It also explores the concepts of singularities, concatenations of arcs, and the inversion of normals. The instructor discusses the generation of surfaces, the resolution of curves, and the representation of shapes using TopSolid 7 software. The lecture delves into the analysis of inclinations, the determination of maximum and minimum points, and the identification of normal and tangent directions on surfaces. Additionally, it examines the lines of crest and talweg, their definitions, and their significance in topography.