What is cross sectioning in surveying?
a vertical section of the ground surface taken at right angles to a survey line.
What are profiles and cross section?
A profile represents a straight line through the point cloud between two points, which gives as result the 3D representation of the point cloud along that line. Cross Sections. A cross section represents a perpendicular line on a path, which gives as result the 3D representation of the point cloud along that section.
What is cross section levelling?
Cross sectioning levelling is another method in profile levelling. The term cross-section generally refers to a relatively short profile view of the ground, which is drawn perpendicular to the route centerline of a highway or other types of linear projects.
What are the types of levelling?
The different types of leveling
- The different types of leveling.
- I ) Direct Leveling : Direct measurement, precise, most commonly used;
- (1) Simple leveling : One set up of level.
- Differential leveling :
- Fly leveling :
- Precise leveling : Precise form of differential leveling.
What is a cross profile?
The cross profile of a river shows how the width and depth of the river valley and channel change as you travel downstream. Near the source of a river there is more vertical erosion as the river flows downhill, using its energy to overcome friction (A).
How are elevations determined in cross section leveling?
Cross-Section Leveling In profile leveling, you determine the elevations of a series of points lengthwise along a highway. In cross-section leveling, you determine the elevations of points on a succession of lines running at right angles to the lengthwise line of the highway.
How to do profile levelling and cross levelling?
Profile levelling and cross levelling 1 Profile Levelling. This method is also called as longitudinal levelling or sectioning. 2 Procedure. Let AB the line of section on which staff station are marked on the ground at every 10 to 30 m. 3 Cross sectioning. 4 Cross section by level.
What kind of data is cross sectional data?
There is also a type of data called cross-sectional data, where we are dealing with information about different individuals (or aggregates such as work teams, sales territories, stores, etc.) at the same point of time or during the same time period.
How is the length of a cross section determined?
The length of the cross section depends upon the nature 30 m to 60 m on each side of the center line and in the case of a railway zero to 300 m or more on either side of the centre line. If the cross section are short, they are set out by eye. e.g. cross section for a road. If long they are set out by the optical square box sentant or theodolite.