What does HPC stand for in surveying?
There are two accepted methods of booking observations – Rise and Fall method and Height of the Plane of Collimation method (HPC/HOC).
What is Backsight distance surveying?
Backsight. A backsight is a reading taken on a position of known coordinate(s). Since a survey progresses from a point of known position to points of unknown position, a backsight is a reading looking “backward” along the line of progress.
How do you survey a elevation?
The elevation is calculated by subtracting the foresight rod reading from the height of instrument. A foresight is the elevation reading of a point of unknown elevation. The rod could be moved to other points as shown in Figure 13, and similar calculations would determine the elevations of these points.
What is the HPC method?
HPC Method. Height of the Plane of Collimation Method. • It consists in finding the elevation of the plane of collimation for every set up of the instrument and then obtaining the reduced levels (RL) of point with reference to the respective plane of collimation.
Why is leveling important?
Leveling is important because gravity is by far the most significant force in the durability and function of buildings. Working parallel and perpendicular to the force of gravity is fundamental in designing and constructing buildings regardless of their shape.
What is an RL in surveying?
Reduced level (RL): this is the height or elevation above the point adopted as the site datum for the purpose of establishing levels. To establish the required depths for a drainage system you need to work from the datum point. The datum is taken as a reduced level of 10,000.
How do you calculate Misclosure in rise and fall?
Allowable Misclosure = ± 5√N mm. (“Rule of Thumb”) When calculations are checked and if the misclosure is allowable Distribute the misclosure. It consist in determining the difference of level between consecutive points by comparing each point after the first with that immediately preceding it.
How do you calculate HPC in surveying?
A second way to calculate the reduced levels is by using the Height (level) of collimation line (or plane). From the above numerical example, Height of Plane of Collimation (HPC) = +120.000 + 1.135 = +121.135m (as from Figure 2) => RLB = HPC – (Staff Reading at B)
What are the methods of mapping in surveying?
MAPPING METHODS IN SURVEYING 1. Applying Necessary Corrections to Measurements. Necessary tape and chain corrections and corrections for local… 2. Drawing Index Plan. On a rough sheet index plan also known as key plan is drawn. This need not be to the scale but… 3. Selecting Scale. Depending
What is high performance computing (HPC)?
What is high-performance computing (HPC)? HPC lets users process large amounts of data quicker than a standard computer, leading to faster insights and giving organizations the ability to stay ahead of the competition. HPC solutions can be one million times more powerful than the fastest laptop.
What are the benefits of a HPC Solution?
HPC lets users process large amounts of data quicker than a standard computer, leading to faster insights and giving organizations the ability to stay ahead of the competition. HPC solutions can be one million times more powerful than the fastest laptop.
What is the use of a parallel HPC?
HPC is a method to address the problem with high complexity related to workload and a large number of data [11]. One of the techniques in HPC is parallel computation [10].