Profile Levelling

This type of levelling is called as longitudinal sectioning. In high way, canal, railway or sewage line projects profile of the ground along chooses routes are needed. Along the route, in such cases, at regular interval readings are taken and RL of different points are found. Then the section of the route is drawn to obtain the profile. Given figure shows the plan view of the scheme of levelling and fig b shows the profile of the route. Vertical scale is usually larger compared to scale for horizontal distances for drawing profile of the route. It gives apparent picture of the profile of the route.

                                                                                      (a)

For this work the typical page of field book have an additional column to note distances as shown in given Table

                                    Page of level book  for profile levelling