PS PS Map Projections & Cartography

Question 1

What type of map projection preserves the shape of small areas but distorts area over large regions?

Accepted Answer

Conformal projection

Answer

Equal-area projection

Answer

Equidistant projection

Answer

Azimuthal projection

Question 2

The State Plane Coordinate System (SPCS) uses which two map projections depending on the orientation of the state?

Accepted Answer

Lambert Conformal Conic and Transverse Mercator

Answer

Albers Equal-Area and Mercator

Answer

Stereographic and Gnomonic

Answer

Polyconic and Azimuthal Equidistant

Question 3

What is the scale factor at the central meridian of a Transverse Mercator projection used in the State Plane Coordinate System?

Accepted Answer

Less than 1.0000

Answer

Exactly 1.0000

Answer

Greater than 1.0000

Answer

Variable depending on latitude

Question 4

Which datum and ellipsoid are used as the basis for the current North American State Plane Coordinate System (SPCS 83)?

Accepted Answer

NAD 83 / GRS 80 ellipsoid

Answer

NAD 27 / Clarke 1866 ellipsoid

Answer

WGS 84 / WGS 84 ellipsoid

Answer

NAVD 88 / GRS 80 ellipsoid

Question 5

What is the purpose of a 'grid factor' (combined scale factor) in State Plane coordinate computations?

Accepted Answer

To convert ground distances to grid distances

Answer

To convert latitudes to northings

Answer

To transform NAD 27 to NAD 83 coordinates

Answer

To calculate true north from grid north

Question 6

On a topographic map with a 1:24,000 scale, what does a map distance of 1 inch represent on the ground?

Accepted Answer

2,000 feet

Answer

24,000 inches

Answer

1 mile

Answer

24,000 feet