LSIT Mathematics and Geomatics 5

Question 1

The Elevation Factor (EF) used in geodetic-to-grid distance reduction is calculated as:

Accepted Answer

R / (R + H), where R is Earth's radius and H is mean elevation above ellipsoid

Answer

EF = R / (R + H) reduces an ellipsoidal geodetic distance to a sea-level equivalent by accounting for the elevation above the ellipsoid.

Question 2

In a curve layout using deflection angles, the deflection angle from the PC to any point on the curve equals:

Accepted Answer

Half the central angle subtended from the PC to that point

Answer

The deflection angle to any chord from the tangent at the PC equals half the central angle subtended by that arc.

Question 3

A cadastral survey is primarily concerned with:

Accepted Answer

Defining and documenting land ownership boundaries and property rights

Answer

Cadastral surveys establish, re-establish, and document property boundaries for legal and land-ownership purposes.

Question 4

The standard deviation of a single measurement where n repeated observations have a standard deviation of the mean (σm) is:

Accepted Answer

σ = σm × √n

Answer

The standard deviation of a single observation σ = σm × √n, because the mean is more precise than any individual measurement by a factor of √n.

Question 5

In LiDAR surveys, the point density is most directly controlled by:

Accepted Answer

Pulse repetition frequency, scan angle, and aircraft speed and altitude

Answer

Point density is a function of pulse repetition rate, scan angle width, aircraft speed, and flying height — all adjustable mission parameters.

(LSIT) Land Surveyor in Training Practice Test