BCT 101 Construction Surveying
Chapter 11 Homework
2. Draw horizontal and vertical guidelines on a sheet of paper and practice to improve your
lettering. Use lettering handout found on website as a guide.
3. List the basic information that should be shown on a site plan.
 Direction of north
 Scale
 Graphical scale
 Vicinity map
 Title Block
 Existing and proposed contours
 Spot elevations
 Coordinates
 Direction and lengths of lines
 Description of monuments
 Road names Description of benchmarks
 All planimetric (human-made) and topographic (natural) features
 Project information – building outline, general utility information, proposed sidewalks
parking areas.
4. State why a graphical scale should be used on all drawings.
The graphical scale shrinks or expands as a building is enlarged or reduced in size. Thus, it can
always be used.
10. Describe why index contours are useful on topographic maps.
Index contours make it easy to determine the elevations of the ground. By only labeling index
contours, the drawing is less cluttered.
11. List and describe the common characteristics of contours.
 A contour on the ground closes on itself.
 Contours are at right angles to the slope
 The ground is always higher on the same side.
 Typically contours will not cross.
 Contours point upstream
12. Describe why contours always point upstream when they approach and cross a river.
Water flows downhill. Therefore, as the contour crosses, the ground where the contour comes
from is lower, causing the contour to come in from downstream, cross the water and then go
towards the downstream again.
13. For the following grid, interpolate, and draw the 5-foot contours. See book 11-35
.