# Answers: November 19

November 26, 2007

**Geodetic and Control Surveys: State Plane Coordinate Systems**

**Problem:**## Problem: Geodetic and Control Surveys: State Plane Coordinate Systems

Considering a state plane zone based on the the transverse Mercator projection, what are the limits of the scale factor outside the lines of exact scale?

(A) The scale factor is always greater that 1 outside the lines of exact scale.

(B) The scale factor is always 1 outside the lines of the exact scale.

(C) The scale factor is always less than zero outside the lines of exact scale.

(D) The scale factor is always greater than zero and less than 1 outside the lines of exact scale.

This is problem 49(9-27) from the new second edition of *1001 Solved Surveying Problems*by Jan Van Sickle. Reprinted with permission from

*1001 Solved Surveying Problems*by Jan Van Sickle (1997, 728 pp., Professional Publications Inc.). For details on this and other FLS exam-prep books, call 800/426-1178 or visit www.ppi2pass.com .

## Answer: A

The cylinder is above the spheroid outside the lines of its intersection, which are the lines of exact scale. The distances on the spheroid are increased when they are projected onto the developable surface. Therefore, the scale factor is greater than 1.