Terminology

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POI WG Terminology Glossary

Very much a work in progress, this terminology glossary focuses on those terms which are used in the public meeting minutes of the POI WG.

Altitude
distance of a point from a chosen reference surface along a line perpendicular to that surface (e.g., height above mean sea level) [ISO 19116 and ISO 6709]
Augmented Reality
Often abbreviated to AR. A live direct or indirect view of a physical environment whose elements are augmented by computer generated information and sensory inputs.
Centroid
In geometry, the centroid, geometric center, or barycenter of a plane figure or two-dimensional shape X is the intersection of all straight lines that divide X into two parts of equal moment about the line. Informally, it is the "average" (arithmetic mean) of all points of X. The definition extends to any object X in n-dimensional space: its centroid is the intersection of all hyperplanes that divide X into two parts of equal moment. In the GIS community, a centroid is typically used in reference to a polygon.
Coordinate
one of a sequence of n numbers designating the position of a point in n-dimensional space [ISO 19111]
Coordinate System
set of mathematical rules for specifying how coordinates are to be assigned to points
Datum
parameter or set of parameters that define the position of the origin, the scale, and the orientation of a coordinate system [ISO 19111]
Gazetteer
directory of instances of a class or classes of features containing some information regarding position [ISO 19112]
Geocoding
translation of one form of location into another (such as an address to a point location). [ISO 19133 and OGC Open Location Services standard]
Geofence
A virtual perimeter for a real world geographic entity. Defined as the extent of an imaginary fence around a location or place, a geofence can have polygonal vector boundaries or be constrained by a radius around a centroid.
Geolocation
The identification of the geographic location of an object.
Geospatial
The combination of spatial software and analysis method with geographic data sets.
Geotagging
The process of adding geographical identification metadata to various media such as photographs, video, websites, SMS messages, or RSS feeds and is a form of geospatial metadata. These data usually consist of latitude and longitude coordinates, though they can also include altitude, bearing, distance, accuracy data, and place names. It is commonly used for photographs, giving geotagged photographs. (Ref: http://en.wikipedia.org/wiki/Geotagging )
Location
identifiable geographic place [ISO 19112]. Explicitly identified by name or geocode
Minimum Bounding Rectangle
Often abbreviated to MBR. In geographic terms the description of a notional rectangle that encloses a location in terms of the coordinates of the top left and bottom right of the rectangle.
Mixed Reality
(encompassing both augmented reality and augmented virtuality) A mix of reality, augmented reality, augmented virtuality and virtual reality.
(Ref: http://en.wikipedia.org/wiki/Mixed_reality )
Pattern Of Interest
Proposed alternate meaning of acronym POI. Generalization of Point Of Interest, tentatively defined as "a set of conditions with associated information". Could be a place, a rock, a car, a person.
Place
An aggregate term that can be used to refer to a point, a location, a POI or a meaningful combination thereof.
Point
0-dimensional geometric primitive, representing a position. [ISO 19107]
Point Of Interest
1. Often abbreviated to POI. A specific point location that is of interest. Frequently used to refer to business locations and tourist or well know sites and locations (Ref: http://en.wikipedia.org/wiki/Point_of_interest )
2. A Point-of-Interest (POI) is the common expression for a place on maps, navigations systems or route planners. These places are considered to have an exceptional meaning for people - they embody a special interest regarding an activity on that place such as a restaurant, a hotel, a petrol station.
3. POI - The properties of a physical position (location) in the world that may correspond to the past, present, or future location of a person, event, or device. [IETF]
Polygon
planar surface defined by 1 exterior boundary and 0 or more interior boundaries [ISO 19107]
Position
data type that describes a point or geometry potentially occupied by an object or person [ISO 19133]
Physical object Identifier
a Physical object(or real world object) identifier or PID is an identifier used to name a physical object
Semantic Web
A group of technologies that allow computer interpretation of the semantics of information available on the World Wide Web.
(Ref: http://www.w3.org/2001/sw/ )