Category: Location

True north

True north is the direction along the earth’s surface towards the north pole. It is used as a reference direction for navigation and surveying.

TrustArc

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Unique object identifier

A unique object identifier is a number that uniquely identifies an object. It is usually assigned by a system, such as a database, and is used to identify the object within the system.

Universal transverse mercator coordinate system

A grid-based system used for mapping locations on the earth’s surface. It divides the earth into 60 zones, each 6° of longitude wide.

Unstructured data

Data that does not have a pre-defined data model or is not organized in a pre-defined manner.

Vector

A data type that represents a quantity with both magnitude and direction.

Vertical coordinate reference system

A coordinate reference system that uses the earth’s gravity field to define the vertical direction.

Vertical coordinate system

A coordinate system that uses the earth’s gravity field to define the vertical direction.

Vertical datum

A reference surface against which vertical measurements are made.

X-coordinate

A coordinate that defines a position along the x-axis of a coordinate system.