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Surveyor's view of the levelling rod with the crosshair. This indicates a reading of 1.422 m, interpolated between the 1.420 m and 1.430 m marks. Rods come in two classes: Self-reading rods (sometimes called speaking rods). Target rods. Self-reading rods are rods that are read by the person viewing the rod through the telescope of the instrument.
The Y level or wye level is the oldest and bulkiest of the older style optical instruments. A low-powered telescope is placed in a pair of clamp mounts, and the instrument then leveled using a spirit level, which is mounted parallel to the main telescope. The term dumpy level (also builder's level) endures despite the evolution in design. They ...
The top mark is at 1,500 mm and the lower is at 1,345 mm; the distance between those two marks is 155 mm, yielding a distance to the rod of 15.5 m. Optical levelling, also known as spirit levelling and differential levelling, employs an optical level, which consists of a precision telescope with crosshairs and stadia marks.
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The rod may be equipped with a target to increase the readable range of the rod. When the target is equipped with a Vernier scale measurements to the thousandths of a foot are possible. For readings less than 7 ft the target is attached on the bottom section of the rod and adjust by signals from level operator until the target is inline with ...
Ragnarok Online (Korean: 라그나로크 온라인, Rageunarokeu Onrain marketed as Ragnarök, and alternatively subtitled The Final Destiny of the Gods) is a massive multiplayer online role-playing game (MMORPG) created by Gravity based on the manhwa Ragnarok by Lee Myung-jin.
The Ragnarok space station is capable of destroying anything off of the face of the Earth. ( Mega Man Zero ) The Monitor Kernel Access / Monika.chr computer program , who destroys the virtual world of Doki Doki Literature Club! to protect the world at large from her fellow programs once they too begin to gain sentience.