FUNDAMENTAL SURVEYING Coordinate Geometry (COGO) & Area Calculation

Question 1

What does COGO stand for in surveying?

Accepted Answer

Coordinate Geometry

Answer

Cartographic Operations and Geodetic Output

Answer

Control Grid Operations

Answer

Contour Generation Output

Question 2

What formula is used in the 'coordinate method' (shoelace formula) to compute traverse area?

Accepted Answer

Area = 0.5 times the absolute sum of (Xn times Yn+1 minus Xn+1 times Yn)

Answer

Area = base times height divided by 2

Answer

Area = sum of (latitude times departure)

Answer

Area = pi times radius squared

Question 3

A parcel has a computed area of 87,120 sq ft. How many acres is this?

Accepted Answer

2 acres

Answer

1 acre

Answer

0.5 acre

Answer

4 acres

Question 4

In state plane coordinates, what is the 'scale factor'?

Accepted Answer

The ratio used to correct ground distances to grid distances

Answer

The number of coordinate units per inch on a map

Answer

The ratio of magnetic to true north

Answer

The factor applied to convert feet to meters

Question 5

What is the 'combined factor' in state plane surveying?

Accepted Answer

Scale factor times elevation factor, used to convert ground distances to grid distances

Answer

The total area multiplied by the zone factor

Answer

Magnetic declination plus convergence angle

Answer

The ratio of grid area to ground area

Question 6

The Double Meridian Distance (DMD) method is used to compute:

Accepted Answer

Area of a closed traverse using latitudes and departures

Answer

Magnetic bearings from astronomic observations

Answer

Elevation differences using trigonometry

Answer

GPS coordinate transformations