The angle in the plane of projection between a straight line and the central meridian of a rectangular coordinate system is called _________ azimuth.

The angle in the plane of projection between a straight line and the central meridian of a rectangular coordinate system is called _________ azimuth.

• A. True
• B. Magnetic
• C. Grid
• D. Astronomical

Answer: (C)

In surveying with a rectangular projection, the reference line is the central meridian, which defines grid north. The angle you measure in the projection plane between a straight line and that central meridian is the grid azimuth. This type of azimuth is specifically tied to the grid (map) reference rather than to true north (astronomical/true azimuth) or magnetic north (magnetic azimuth). So the described angle corresponds to grid azimuth.

In surveying with a rectangular projection, the reference line is the central meridian, which defines grid north. The angle you measure in the projection plane between a straight line and that central meridian is the grid azimuth. This type of azimuth is specifically tied to the grid (map) reference rather than to true north (astronomical/true azimuth) or magnetic north (magnetic azimuth). So the described angle corresponds to grid azimuth.