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A direction that is expressed as a standard bearing is also based on a 360 degree circle but uses different points of reference. A bearing of N 60 degrees east means the direction is 60 degrees to the east of north. Likewise a bearing of S 15 degrees east means the direction is 15 degrees to the east of due south.
How do you read a bearing?
The bearing of a point is the number of degrees in the angle measured in a clockwise direction from the north line to the line joining the centre of the compass with the point. A bearing is used to represent the direction of one point relative to another point. For example, the bearing of A from B is 065º.
How do you read the coordinates of a survey?
Degrees, minutes, and seconds are the units of measure for property survey bearings. For example, N 38° 03′ 09″ E would translate as 38 degrees, 3 minutes, 9 seconds from the north to the east. The boundary lines, or “legs,” are often denoted in feet and listed directly below or after the bearing.
Are bearings on survey maps magnetic or true north?
Bearing: See Azimuth. Bearings taken with a compass will be referenced to magnetic north unless otherwise noted. Benchmark: A survey mark made on a monument having a known location and elevation, serving as a reference point for surveying.
What is a bearing base on a survey?
Basis of bearing means the bearing in degrees, minutes and seconds, or equivalent, of a line between two (2) monuments or corners which serves as the reference bearing for all other lines on the survey. Sample 1.
What do the letters after a bearing number mean?
The letters after the bearing number indicates the presence / absence / type of shielding or sealing and any other specialties in the bearing.
What do the numbers mean on a survey?
Each segment will contain numbers and letters indicating the direction from North that the line proceeds as well as the distance to the next point. For example, a segment may have the notation N 15° 30′ 45″ E on one side of the line and the notation 166.25′ on the other side of the line.
What do coordinates on a survey map mean?
coordinates, geodetic—The quantities of latitude and longitude which define the position of a point on the surface of the Earth with respect to the reference ellipsoid. Also called “geographic coordinates.”.
How do you read a survey map with a compass?
Read the Compass Degree system by starting with a specific point on the compass (north, east, south or west), and then reading the number of the degrees to the next point on the compass. An example heading might be N63E.
How do you find true north?
When the needle and orienting arrow line up, the direction of travel arrow on the base will point true north. You can also accomplish this by aligning the orienting arrow and the direction of travel arrow. Then, hold out your compass and turn your body until the needle points to your declination.
How much of a difference is there between magnetic north and true north?
If you were standing on the geographic north pole holding your compass, it would point towards northern Canada at Ellesmere Island. This is a difference of about 500 kilometers between the Geographic North and Magnetic North poles! This difference is called the magnetic inclination.
What is true north in surveying?
True north is the direction that points directly towards the geographic North Pole. This is a fixed point on the Earth’s globe.
How do you calculate distance on a map scale?
If the scale is a verbal statement (i.e. “1 inch equals 1 mile”), determine the distance by simply measuring it with a ruler. For example, if the scale says 1 inch = 1 mile, then for every inch between the two points on the map, the real distance on the ground is that number in miles.
How do you calculate true bearing?
(i) True Bearing = (Magnetic Bearing + Declination) = (89°45՛ + 5°30՛) = 95°15՛. b) In fig. (ii) True Bearing = (Magnetic Bearing – Declination) = (89°45՛ – 4°15՛) = 85°30՛.
What is C1 c2 C3 in bearing?
C codes for degree of bearing clearance If a bearing has a C code, it offers extra internal clearance. C1 offers the least extra clearance, C5 offers the most extra clearance. The extra margin C3 offer is considered ‘normal’. Bearings with C3 are in fact the most commonly used.
What does C3 in a bearing designation refer to?
Internal clearance being C3 means that the bearing has room for expansion if needed between the races of the bearing, whilst holding the outer ring and moving the inner ring in a radial movement you will detect a little amount of play between the two rings. C3 means the bearing has more clearance than standard.
What does Z mean on bearing?
2 Z / ZZ – Bearing with a metal seal on both sides. Z – Bearing with a metal seal on one side, one side open. E – Reinforced Design.
How do you read a metes and bounds?
A metes and bounds description, which means distance and direction, begins and ends at a landmark called the point of beginning (POB). The property is measured and described in a point of direction from a starting point using angles, distance, directions, and landmarks.
What does FF mean on a survey?
Also referred to as FF is Finished Floor Elevation. The term FFE refers to the top of the structural slab and its elevation above sea level. FG. Finished grade. The term FG refers to the elevation above sea level for the finished grade or finished ground.
How do you read a land location?
The legal description of land follows a set sequence of quarter section, township, range, and meridian: the designation NW 27-9-25 W2, for instance, means the Northwest Quarter of Section 27 in Township 9 Range 25 West of the Second Meridian.
