# Whats mean by datum?

## Whats mean by datum?

datum in American English 1. something known or assumed; information from which conclusions can be inferred. see also data. 2. a real or assumed thing, used as a basis for calculations or measurements, as a level (also datum plane) from which elevations and depths are measured in surveying.

What is the dictionary definition of Axis?

ax·​is | \ ˈak-səs \ plural axes\ ˈak-​ˌsēz \ Essential Meaning of axis. 1 : the imaginary straight line that something (such as the Earth) turns around the Earth’s axis of rotation the spin of the Earth on its axis. 2 : a straight line that divides a shape evenly into two parts.

What is a example of datum?

A datum is a model of the earth that is used in mapping. Another example, familiar to GPS users, is the WGS-84 datum. WGS-84 is an example of a datum that is used globally. Latitude and longitude are commonly used to refer to a specific location on the surface of the Earth.

### What does datum mean in real estate?

A surveyor uses a datum as an official elevation point to describe the height or depth of a property. If, for example, the datum for an area is a point 100 feet above sea level, all surveys in the area will indicate elevation as a distance above or below 100 feet above sea level.

What is an axis of a graph?

An axis is the reference line that is used to measure coordinates on graphs and grids. There are typically two axis lines (axes) on a graph; the y-axis and the x-axis. The y-axis is vertical, while the x-axis is horizontal.

What are the Axis powers?

Axis powers, coalition headed by Germany, Italy, and Japan that opposed the Allied powers in World War II.

#### How many datums are there?

There are two main datums in the United States. Horizontal datums measure positions (latitude and longitude) on the surface of the Earth, while vertical datums are used to measure land elevations and water depths.

What does datum mean in surveying?

geodetic datum
A geodetic datum is an abstract coordinate system with a reference surface (such as sea level) that serves to provide known locations to begin surveys and create maps. In this way, datums act similar to starting points when you give someone directions.

What language is datum?

From Middle Dutch datum, from Latin datum (“given”, past participle) (from the practice of signing letters in Latin by noting the date on which they were dispatched). Compare English date.