What is a bench mark used for?

What is a bench mark used for?

Bench marks, or marked points on the Earth's surface, connected by precise leveling constitute the vertical controls of surveying. The elevations of bench marks are given in terms of their heights above a selected level surface called a datum.

What is bench mark in map?

A benchmark is a reference point that helps one to calculate something. A "bench mark" associated with surveying can be referred to a permanent mark created at a recognized height which is used as the basis for measuring different altitude of topographical point. The set of conditions are measured.

Why is it called a benchmark?

The term benchmark, bench mark, or survey benchmark originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle-iron could be placed to form a "bench" for a leveling rod, thus ensuring that a leveling rod could be accurately repositioned in the same place in the future.

What does benchmark mean in construction?

A benchmark is a pre-determined standard or point of reference against which other things, people, costs, time or activities can be measured. It is regarded as an achievable standard which a failure to achieve could deem the work in question to be unsatisfactory.

What are the 4 types of benchmarking?

There are four main types of benchmarking: internal, external, performance, and practice.

Where does bench mark come from?

The term benchmark, bench mark, or survey benchmark originates from the chiseled horizontal marks that surveyors made in stone structures, into which an angle-iron could be placed to form a "bench" for a leveling rod, thus ensuring that a leveling rod could be accurately repositioned in the same place in the future.

What is spot height on a map?

A spot height is an exact point on a map with an elevation recorded beside it that represents its height above a given datum. ... In geoscience, it can be used for showing elevations on a map, alongside contours, bench marks, etc.

What is the definition of bench mark?

• A benchmark is a point of reference by which something can be measured. In surveying, a "bench mark" (two words) is a post or other permanent mark established at a known elevation that is used as the basis for measuring the elevation of other topographical points.

What is a bench mark in a topographic map?

• A benchmark is a monument that is part of a leveling network and is a point of precisely measured elevation. Looking at most any 7.5 minute or 15 minute topographic map you can probably find several benchmarks on it. Most of those at lower elevations are labelled with "BM" and an elevation next to an "X" mark.

What is a bench mark plan?

• benchmark plan. What is a benchmark plan? There are two different meanings for the term benchmark plan – and both have to do with the Affordable Care Act: The second-lowest-cost Silver plan available in the exchange in a given area. The price of this plan is used to calculate premium subsidies.

What is bench mark company?

• Benchmark is an American information consulting and technology management company headquartered in Macon , Georgia, Benchmark since 2004 has worked with small to medium businesses, large corporations, K12, the Public Sector, and non-profit organizations providing them with award-winning customer help desk support as well as varying solutions from IT ...