So, that is the azimuth of line BC. Home. In brief terms Astronomic azimuth is true north; your meridional circuit is grid north, and magnetic north is the local magnetic north at any point on the earth's surface (not very useful in surveying terms but alas it is used as a reference in Australia for their cadastral surveys>>baffling!!) With 180 to 270 degree azimuth, your bearing = azimuth – 180 With 270 to 360 degree azimuth, your bearing = 360 – azimuth For example, an azimuth of 296 degrees converts to a bearing of N 64 W. Figure 2. The azimuth places the line in the southeast quadrant. The azimuth is also represented on the map by the azimuth lines, and the elevation on the time bar. A progression in survey effort from one vessel towing sources and streamers sailing a survey area in two or more directions to several vessels sailing a survey area in two or more directions, some of them possibly only towing sources, represents the operational contrasts between multi-azimuth (MAZ), wide-azimuth (WAZ), and full-azimuth (FAZ) 3D seismic. In surveying, a gyrotheodolite (also: surveying gyro) is an instrument composed of a gyroscope mounted to a theodolite.It is used to determine the orientation of true north.It is the main instrument for orientation in mine surveying and in tunnel engineering, where astronomical star sights are … 1. When I setup on the known point and back sight to another known point the software shows the correct azimuth as described in the deed, so I am surveying with true azimuth right? onvert this into bearing. The angle between the vertical projection of a line of interest onto a horizontal surface and true north or magnetic north measured in a horizontal plane, typically measured clockwise from north. Azimuth is a horizontal angle measured clockwise in degrees from a reference direction, usually the north or south point of the horizon, to the point on the horizon intersected by the object's line of altitude (a line from the observer's zenith through the object to the horizon). Therefore, the azimuth described in astronomy is slightly different from the azimuth described in the cartography. The azimuth of a boundary line is 128° 13’ 46”.
Thus the bearing angle is: 180° 13’ 46” - 128° 13’ 46” = 51° 46’ 14”, and the equivalent bearing is S 51° 46’ 14” E Example 2 The first course of a boundary survey is written as N 37° 13’ W. Or other reasons? Welcome to Azimuth Surveying, one of the premier land surveying companies in the Salem, Oregon area.

It is the azimuth of line AB, plus 180° (to get the direction opposite to line AB, or direction BA), minus the measured angle at B: AzBC = AzAB + 180° - 70.000000° = 60.839722° + 180° - 70.000000° = 170.839722°.