- Datum Feature | GD T Basics
Datums are theoretically exact points, axes, lines, and planes or a combination thereof that are derived from datum features A datum feature is the tangible surface or feature of size (comprised of multiple surfaces or revolved surfaces) that is indicated by the datum feature symbol
- Datum reference - Wikipedia
A datum reference or just datum (plural: datums[Note 1]) is some geometrically important part of an object, such as a point, line, plane, hole, set of holes, or pair of surfaces
- Datums and Reference Frames | Datums | National Geodetic Survey
NGS defines the official geodetic datums for all federal mapping activities in the U S and its territories (see Table 1) as part of the National Spatial Reference System (NSRS)
- What Are Datums? A guide to all their types and applications.
In engineering, datums are a fixed reference point, line or plane used to establish a coordinate system which engineers use to locate and measure certain features on a part
- What Are Datums? | GD T Overview - KEYENCE America
What Are Datums? A datum is a plane, a straight line, or a point that is used as a reference when processing a material or measuring the dimensions of a target
- GSP 270: Datums Defined
For hundreds of years, datums were established in each area for the data to be referenced to within that area However, the datums we use today are based on ellipsoids for the entire earth rather than a single area
- Datums - Map Coordinate Reference Frames
This means that datums are the reference frames used in the construction of maps Realization, the disks in the ground and the catalogue of their coordinat es, are the practical way datums are used
- Geodetic datum - Wikipedia
Contemporary datums, based on increasingly accurate measurements of the shape of Earth, are intended to cover larger areas The most common reference Datums in use in North America are NAD 27, NAD 83, and WGS 84
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