LSIT Geodesy and Control Surveys 2

Question 1

The State Plane Coordinate System (SPCS) uses which map projections?

Accepted Answer

Lambert Conformal Conic and Transverse Mercator

Answer

SPCS uses Lambert Conformal Conic for states with greater east-west extent and Transverse Mercator for states with greater north-south extent.

Question 2

In the Universal Transverse Mercator (UTM) system, each zone spans how many degrees of longitude?

Accepted Answer

6°

Answer

The UTM system divides the world into 60 zones, each spanning 6° of longitude, for a total coverage of 360°.

Question 3

The combined scale factor (CSF) in grid surveying accounts for:

Accepted Answer

The ratio of grid distance to ground distance at a given location

Answer

The CSF converts ground distances to grid distances (or vice versa) by combining the map projection scale factor and the elevation factor.

Question 4

Meridian convergence (mapping angle γ) is defined as:

Accepted Answer

The angular difference between grid north and geodetic north

Answer

Meridian convergence is the angle between grid north and geodetic (true) north at a given point in a projected coordinate system.

Question 5

Continuously Operating Reference Stations (CORS) primarily support:

Accepted Answer

High-accuracy GPS/GNSS positioning through continuous reference data

Answer

CORS stations provide continuous GPS/GNSS tracking data that surveyors access to perform high-accuracy positioning and control surveys.

(LSIT) Land Surveyor in Training Practice Test