Measurements 1 (2/29/21) Flashcards
The cost of a timber cruise should be kept to a minimum of ___ percent of the total timber value.
5
Pacing is the most rudimentary of all techniques in determining what in the field?
Distance
A professional forester’s pacing accuracy is expected to be what?
1 in 8
Pace distances should be field recorded in what?
Paces/Chains
_______ are horizontal angles that are references to one of the quadrants of the compass namely northeast, southeast, southwest, or northwest.
Bearing
_____ are comparable angles measured clockwise from due north this the readings from 0 to 360 degrees.
Azimuth
The direction in which the compass needle points.
Magnetic North
What is the angle formed between magnetic north and true north?
Declination
What is the line of zero declination passing through the eastern part of the US?
Agonic Line
Consists of a magnetized steel needle mounted on a pivot at the center of a graduated circle.
Compass
A field survey of an area or tract of land where all boundary lines and corner angles are measured and the acres are determined.
Closed Traverse
A compass reading from a point on a traverse to the previous point. This reading should measure 180 degrees.
Backsight
Topographic maps have contour lines that indicate what?
Elevation
When using a topographic map representative fractions are converted to feet per inch by what?
Divide by 12
A survey method used to describe a legal description of property using references to bearings, distances, and permanent monuments.
Metes and Bounds
A survey method that uses a rectangular system of sections, townships, and ranges.
Public Land Survey
The origin of a survey system established by astronomical observation.
Initial Point
The longitude true north and south line that intersects the base line at the initial point.
Principal Meridian
The latitude true east and west line that intersects the principal meridian at the initial point.
Base Line
What do you call a division of territories 6 miles long at the south east and west boundaries and slightly less than 6 miles on the north which accounts for the correction lines located every 6 miles on a standard parallel?
Township
Lines established as true meridians at 6-mile intervals along each standard parallel and run due north of the next standard parallel.
Range Lines
A section is composed of how many acres?
640
A section measures approximately how many square miles?
1
Consists of approximately 160 acres and is designated as the northeast, southeast, northwest, or southwest.
Quarter Section
The map showing the magnetic declination for a specific interval of time.
Isogonic Chart
The survey record of parceling of land according to a prescribed method by law, the deed description of property.
Legal Description
The GPS consists of ____ satellites, each satellite completely circles at ____ hour intervals.
24 12
How many satellites are required for accurate measurement with a GPS?
4
What is the technical term referring to the method GPS receivers use to calculate position?
Trilateration (Triangulation)
When moving from one geographic region to another you compass __________ must be adjusted to point true north.
Declination
A dot grid is used on a map or aerial photo determine what?
Acres
A surveyor’s or Gunner’s chain is ___ feet long and is divided into ____ equal parts that are known as ______.
66 100 Links
How many sections are in a township?
36
Which section is designated as school property?
16th
