A transit theodolite is a type of surveying instrument that is used to measure horizontal and vertical angles, as well as distances between points. The transit theodolite is similar to a traditional theodolite, but with the addition of a transit mechanism that allows the instrument to rotate about a vertical axis and lock into place…
A non-transit theodolite, also known as a conventional theodolite, is a type of surveying instrument that is used to measure horizontal and vertical angles. Unlike a transit theodolite, a non-transit theodolite does not have a transit mechanism and is therefore not able to rotate about a vertical axis or lock into place when the instrument…
Theodolite survey is a type of surveying that involves the use of a theodolite instrument to measure angles and distances on a construction site or survey area. The theodolite instrument typically consists of a telescope that can be rotated and tilted, a sighting mechanism, and a graduated circular scale. The theodolite is used to measure…
There are two main methods of Plane Table Surveying: Traversing Method: In the traversing method, the surveyor takes readings and makes sketches at a series of points along a route or path. The surveyor moves from point to point, taking readings and making sketches as they go. This method is useful for surveying large areas,…
Orientation in Plane Table Surveying refers to the process of aligning the plane table and alidade with the north-south direction. This is important because it ensures that the readings taken and the sketches made on the plane table are correctly aligned with the earth’s magnetic field, which helps to prevent errors in the survey results….
The working operation of Plane Table Surveying involves the following steps: Setting up the plane table: The first step is to set up the plane table on a tripod, making sure it is level with the help of a spirit level. The alidade is then attached to the plane table. Taking readings: The surveyor uses…
Plane Table: The plane table is a flat drawing board that is mounted on a tripod. It is typically made of wood or metal, and is designed to be sturdy and stable. The surface of the plane table is usually covered with a sheet of white paper, which can be easily replaced as needed. Alidade:…
Plane Table Surveying is a traditional surveying method that involves the use of a flat drawing board (known as a plane table) and a specialized alidade to take precise measurements and make accurate drawings of the terrain being surveyed. This method of surveying is often used in areas where a detailed survey of a small…
The components of a Prismatic Compass and a Surveyor’s Compass are essentially the same and include: Bearing: The circular dial that rotates and is used to measure angles. Graduations: The markings on the bearing that indicate the measurement of the angle. Needle: The magnetic needle inside the compass that aligns with the earth’s magnetic field….
A Prismatic Compass can be adjusted in two ways: temporarily and permanently. Temporary Adjustments: Magnetic Declination: The angle between magnetic north and true north can be adjusted on the bearing of the compass to account for the difference in orientation. This adjustment is typically made on a daily basis as it can change over time….
