Mapping & Platting Techniques Flashcards
7 cards from real CST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Mapping & Platting Techniques flashcards as text
On a map drawn at 1" = 100', a line measures 3.25 inches. What ground distance does it represent?
Answer: 325 ft
3.25 in × 100 ft/in = 325 ft.
What is the representative fraction for an engineering scale of 1" = 200'?
Answer: 1:2,400
200 ft × 12 in/ft = 2,400 inches, so the ratio is 1:2,400.
On a topographic map, index contours are most commonly drawn heavier at which interval?
Answer: Every fifth contour
Standard practice makes every fifth contour a heavier, labeled index contour.
When contour lines cross a stream, the V-shape they form points in which direction?
Answer: Upstream
Contours bend upstream where they cross a drainage channel.
Contour lines that are spaced very closely together indicate:
Answer: A steep slope
Close spacing means elevation changes rapidly over a short horizontal distance.
Which set of data is most commonly shown in a curve table on a subdivision plat?
Answer: Radius, delta angle, arc length, chord bearing, and chord distance
Curve tables give the geometric elements needed to define and retrace each boundary curve.
What is the main purpose of a vicinity map on a plat?
Answer: To show the site's location relative to surrounding roads and landmarks
A vicinity map is a small-scale inset that helps users find the platted area.