Understanding simple difinition contour lines ₪ 1.2. Longitudinal plotting and cross sections

 During a preliminary draft of the study of a road project, the designer needs a cross-sectional view of the natural terrain along the awis of the project he is studying: this graph is the cross sections. These two types of graphs make it possible to obtain, after several studies, an 'ideal' layout meeting the requirements of the project which are the cross sections. These two types of graphs make it possible to obtain, after several studies, an 'ideal' layout meeting the requirements of the project which are visibility, influence on the ground, maximum gradient, least cost, etc.