Abbreviations

Results for area 6.4 Digital map database

term
digital map database
definition

structured set of digital and alphanumeric data portraying geographic locations and relationships of spatial features

Note 1 to entry: Typically, such structures represent, but are not limited to, the digital form of hard copy maps. For example, drawings can be imported into a Geographic Information System (GIS) and considered as a form of digital map.

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application program interface (API)
definition

API ISO context specification interface and set of function calls between application software and data access libraries of vehicle navigation systems

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Background
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data file
definition

collection of related data records having a homogeneous structure

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Background Imagery
definition

data model entity that provides background images upon which the road network of an area may be displayed

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Building & Facility
definition

data model entity that provides the location and shape of road side features such as a toll gate, or a fixed Road Side ITS station

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data record
definition

record containing Feature-related data

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link identifier (link ID)
definition

identifier that is uniquely assigned to a link

NOTE 1 to entry: A link identifier can be arbitrary or can be assigned by convention, to ensure that no multiple occurrences of the same identifier will be used within one instance of a network or map database.

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Cartographic Feature Type
definition

data model entity that provides cartographic feature by their type (Symbol, Point, Polyline and Polygon)

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global record
definition

record that logically precedes the data records and contains control parameters, data definition and documentation necessary to interpret companion data records

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Caution Point
definition

data model entity that provides warning information about an approaching potential hazard on the Road Elements that may require some action by the driver of a vehicle

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parcel
definition

database partitioning unit corresponding to a certain coverage area, associated with one level and containing data of one or more layers

NOTE A parcel contains (at least) all nodes with positions enclosed by or located on the outline of its coverage area plus (parts of) all links attached to these nodes; it can be partitioned so that the amount of data of a parcel may be nearly the same as that of another.

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Detailed Special Route
definition

data model entity that provides the detailed information of Special Route such as the ordered sequence of Link and Intersection lists, length of route and fee of toll road

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items
definition

Named sequences of characters from the DNF character set which are used to form the DNF notation

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Direction Guide
definition

data model entity that provides the guidance information for a path which is composed of the entrance Link and the exit Link connected to an Intersection

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District Name
definition

data model entity that provides the name of a geographic area feature for each Link connected to an intersection

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address location (AL)
definition

application category that deals with the task of expressing a real world position in terms of the data representation

NOTE Address location is one of the six application categories supported by the API.

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Figure Element
definition

data model entity that provides the shape data of a cartographic feature for displaying a map

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matching
definition

translating a location reference to a specific object in a given map database to attempt recognition of the same identified object in both the sender’s and the receiver’s map database

NOTE 1 to entry: Matching is seen as a subsequent part to the method of decoding a location reference adhering to the defined LRM.

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Intersection Connecting Point
definition

data model entity for a topological junction of two or more links or end bounding a link

NOTE 1 to entry: A link stores the coordinate value of the corresponding GDF junction.

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transcription
definition

rendering of geographic names from a non-alphabetic script into an alphabetic one or vice versa

NOTE The term is also applied to initial recording in script of hitherto unwritten names.

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Intersection Cost
definition

data model entity that provides the time or monetary cost between the entrance Link and exit Link of Intersection for calculating route

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floating-point type
definition

type consisting of all possible floating-point numbers plus the two values +∞ and -∞

NOTE The floating-point type is a subset of the real type in ASN.1. The real type accommodates bases other than 10.

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Intersection Link
definition

data model entity that provides the Links in the Intersection used for determining the path through an intersection

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ground-truth surrogate
definition

reference source of sufficient Completeness and/or accuracy that may be substituted for Field verification when measuring the Completeness and/or accuracy of map database Features, Attributes, or properties

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Intersection Link Shape
definition

data model entity that provides the shape of the Intersection Link for displaying a path

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record
definition

implementation dependent construct that consists of an identifiable collection of one or more related Fields

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Intersection Name
definition

data model entity that provides the name of an Intersection. An Intersection may have one or more names corresponding to the direction of entering into the intersection

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field
definition

specified part of a record containing a unit of data which may be a data element or a data item

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Lane Shape
definition

data model entity that provides the shape geometry of the lane

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DNF character set
definition

set of characters used in the DNF notation

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album
definition

collection of related Datasets (logical sub-division) and, if applicable, Volumes (physical sub-division)

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Link Cost
definition

data model entity that provides the time or monetary cost of the Link for calculating route

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section
definition

spatial subset of a Dataset

NOTE The coverage area of a map sheet, confined by geographic coordinates, can be considered a Section.

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Location Image
definition

data model entity that provides a background image of the Road Element and the intersection upon which guidance information is displayed

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Map Data Background
definition

data model entity that provides map database features for background display

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spatial domain
definition

description of the limits of a geographical area to which a particular set of data belongs spatially

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logical unit
definition

collection of data that may be regarded as a logically undivided whole

EXAMPLE One logical record.

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picture file
definition

this entity is the file of picture object

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Place Reference Point
definition

data model entity that provides a representative point within a Place

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Road Bridge and Tunnel
definition

data model entity that provides information such as the length, height and slope of bridges and tunnels

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Road Element Shape
definition

data model entity that provides the shape geometry of the Road Element for displaying Road and Positioning

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Road Marking
definition

data model entity that provides the shape of painted markings on roads such as lane markings these may be used for display purposes

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Road Signage
definition

data model entity that provides the detailed text of the road signage on the Road Element

NOTE 1 to entry: Route Guidance is one of the six application categories elements and joining two intersections, serving as the smallest independent unit of a road network at GDF level 2.

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Service and POI Reference Point
definition

data model entity that provides a representative point of a Service and POI

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Street Address
definition

data model entity that provides the geocoded Street Address of the Road Element

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Traffic Restriction
definition

data model entity that provides the traffic restrictions such as one way or turn restrictions for route calculation purposes

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data set
definition

sub division of Album, which in turn can be subdivided into Sections

EXAMPLE Large set of data covering a particular geographic area.

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