Horizontal control station marks indicate what information is determined?

Horizontal control station marks indicate what information is determined?

• A. Latitude and longitude have been determined
• B. Elevation only
• C. Depth of water
• D. Magnetic declination

Answer: (B)

Horizontal control marks fix a position on the Earth's surface in the horizontal plane. When a horizontal control station is established, it provides the exact latitude and longitude of that point relative to a reference coordinate system. Elevation is handled by vertical control marks, not horizontal ones, so it isn’t determined by horizontal control. Depth of water and magnetic declination relate to other topics (hydrography and magnetism, respectively) and aren’t what horizontal control marks convey. Therefore, the information determined by a horizontal control station is the latitude and longitude.

Horizontal control marks fix a position on the Earth's surface in the horizontal plane. When a horizontal control station is established, it provides the exact latitude and longitude of that point relative to a reference coordinate system. Elevation is handled by vertical control marks, not horizontal ones, so it isn’t determined by horizontal control. Depth of water and magnetic declination relate to other topics (hydrography and magnetism, respectively) and aren’t what horizontal control marks convey. Therefore, the information determined by a horizontal control station is the latitude and longitude.