cameroon gce A level special technique surveying 3

cameroon gce A level special technique surveying 3

cameroon gce A level special technique surveying 3

Figure 1 shows a square grid with staff readings taken at 20m intervals over an area where it is proposed to erect a small building with a formation level of 100.16m. With reference to a site Bench Mark (BM2), whose height is 100.000m.

YOU HAVE BEEN PROVIDED :

• A computer with Softwares for calculations and drawings (Excel and Covadis) ;
• A printer ;
• A4 size drawing paper.

1. 1. Determine the spot heights at each grid node. (5 marks)
2. Given that the plane coordinates of point 1 are (X₁=40.00m.Y₁=60.00m,Produce the plan of the site to scale 1/250 on an A4 size drawing paper and trace contour lines through a vertical interval of 0.25m.                                                    (8 marks)
3. Produce a list of coordinates X, Y, H of all the points. (1 mark)
4. If the entire site is to be excavated to a height of 100.16m, determine the working height at each grid node.          (2 marks)
5. Calculate the volumes of earth works and produce a plan showing the regions of cut and fill and the volumes of cut and fill                 (4 marks)

NB: The finished plan should contain the cadastral information in figure 2 and 3s