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.

record containing Feature-related data

one of the three descriptors associated to an ILOC reference

any feature from the Roads and Ferries feature theme of the GDF

database representation of a real world object

specific quality or quantity assigned to an Attribute

point or set of points that is available in any location reference

alphanumeric identifier for an Attribute type

hierarchical data structure which on a next lower level subdivides a given area into four quadrants of the same size where any level has knowledge of its four sublevels and its parent level

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

EXAMPLE One logical record.

methodology of assigning location references to locations

register of spatial references of one or more location sub-types containing some information regarding position

NOTE 1 to entry The positional information need not be coordinates but could be descriptive.

[SOURCE: ISO 19112:2019, 3.1.1, modified — “register of location instances...” changed to “register of spatial references...” in order to fit the relevant concept model.]

ordered list of values

NOTE 1 to entry Considered values are here geodetic coordinates.

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

two-dimensional element bounded by a closed sequence of Edges and by zero or more sets of non-intersecting closed sequences of Edges within the first sequence of Edges

NOTE The Face is the atomic two-dimensional element.

navigable feature which is either a named GDF junction or named GDF intersection, and that relates a named navigable feature to a set of links and nodes and a place

shape along the location, coded on the most detailed level of the digital map, lying in a corridor with a defined perpendicular distance to the great circle connection between two successive points on a location

semantic or topological interrelation or dependency between locations in the LRS

NOTE Relationships can exist between locations in the LRS. These relationships will generally be structured to allow more sophisticated use of the location reference, such as a topological or hierarchical structure. For example, a county location may be defined as an aggregate of several city locations or a long stretch of road may be an aggregate of several smaller road segments. Referencing the county may be easier than referencing all the cities which make up the county. This allows scalability and ease of use in the LRSs using the LRM.

graph which can be embedded in a plane, meaning that it can be drawn on the plane so that Edges intersect only at a Node mutually incident with them

one-dimensional type of cartographic feature

data model package that is composed of Road Element, Intersection, Link Cost, Intersection Cost, Traffic Restriction, Special Route and Detailed Special Route

defined characteristic of a Feature, which is independent of the other Features

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.

subset of map data resulting from a classification of data of the same semantic content based on the level of detail or density, related to the concept of different map scales

NOTE Level 0 is considered the lowest level (greatest detail); higher levels are numbered level 1, level 2, etc.

EXAMPLE Map display data may be organised into 6 levels representing different zoom scales.

sub-set of map data resulting from a subdivision of data of the same coverage area based on contents (similar to ISO 14825 GDF layer) and which is typically related to one or only a few of the application categories

EXAMPLE District name, which is one of the data items for Route Guidance applications, is included in a layer.

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

zero-dimensional type of cartographic feature