Abbreviations

Results for area 6.3 Geocoding

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geocoding
definition

software process of matching a street address or other geographic entity against a map database in order to derive the geographic co-ordinates of the address or the associated street segment

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feature
definition

database representation of a real world object

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feature category
definition

type of representation of a Feature, including Point, Line, Area and Complex Feature

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landmark
definition

point, line, or area feature, possibly associated with a node or link, that can be used to clarify the directions generated to describe a route

NOTE A landmark may not be in the Services, Administrative Areas, or Public Transportation feature themes of a GDF; a facility in which a service is located may be a landmark.

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line feature
definition

one-dimensional Feature defined as a sequence of one or more Edges

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feature name
definition

name associated with a Feature Class

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area feature
definition

two-dimensional Feature, defined by one or more Faces

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feature class
definition

categorization of a Feature

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repeating attribute type
definition

Attribute Type that may have multiple values associated to one and the same instance of a particular Feature Class

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primitive
definition

fundamental form from which all other forms can be derived

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attribute code
definition

alphanumeric identifier for an Attribute type

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attribute name
definition

name associated to an Attribute Type

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attribute value
definition

specific quality or quantity assigned to an Attribute

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service attributes
definition

descriptive information of services

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composite atribute
definition

complex attribute attribute consisting of two or more atomic values and/or attributes

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attribute type
definition

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

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feature class code
definition

alphanumeric identifier for a Feature Class

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logical domain
definition

range of Attribute Values to which a meaning has been assigned

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navigation feature
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segment
definition

straight section of a link connecting two successive shape points, or a shape point and a node, or two nodes where a link does not contain shape points

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intersection
definition

crossing and/or connection of two or more roads

NOTE In GDF, an intersection is a Level 2 representation of a junction which bounds a road or a ferry. It is a complex feature, composed of one or more Level 1 junctions, road elements and enclosed traffic areas. The definition is different from GDF because the location referencing system refers to real-world objects rather than a database definition as defined in GDF.

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complex intersection
definition

intersection that consists at least of two or more junctions and one or more road elements

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crossroad
definition

data model entity that represents the single instance of the crossing of two named navigable features

NOTE Crossroad relates to the set of links and nodes which comprise the crossing, and to the crossing of the navigable features to a place.

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junction
definition

elementary element in the road network, connecting two or more road elements

NOTE In GDF terms, it is a Level 1 feature that bounds a road element or ferry connection. Junctions that represent real crossings are at least trivalent (having three roads connected). A bivalent junction may only be defined in case an attribute change occurs along the road (e.g. road name change). A junction is also coded at the end of a dead-end road, to terminate it.

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road crossing
definition

location where two or more roads connect or intersect

NOTE 1 to entry: A road crossing can be “simple”, corresponding to one junction, or “complex”, including internal road elements and junctions.

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manoeuvre
definition

ordered sequence of a Road Element, a Junction and one or more Road Elements, and optionally associated with a Traffic Sign

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path
definition

finite, alternating sequence of nodes and edges, such that every arc is immediately preceded and succeeded by the two vertices with which it is incident and in which no vertex is repeated, except (possibly) the first and the last one

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segment
definition

straight section of a link connecting two successive shape points, or a shape point and a node, or two nodes where a link does not contain shape points

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navigable feature name
definition

data model entity that represents the name for the transportation element, including GDF road element, GDF ferry connection, GDF junction, GDF intersection

NOTE Navigable feature name is related to places, crossroads, junctions, and road sections.

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cartographic feature
definition

data model entity that represents geometrical information for display purposes

NOTE A cartographic feature has non-explicit topology; it has zero-, one- and two-dimensional types, i.e. Display Point, Polyline, and Polygon.

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polyline
definition

one-dimensional type of cartographic feature

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face
definition

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.

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outlined area
definition

explicit area with an outline defined by segments being either polylines or linear locations

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simple geometric area
definition

explicit area with an outline defined by a simple geometric figure

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explicit area
definition

two-dimensional face on the surface of the earth, with a specified outline either being a simple geometric figure or an irregular outline/polygon

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implicit area
definition

selection of road segments to be referenced belonging to a certain area (subnetwork)

NOTE 1 to entry: One implicit area can be built up of multiple subnetworks that are geographically connected.

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rectangle
definition

unit of geographic space defined by two parallels of min./max. latitude and by two meridians of min./max. longitude and that represents the coverage area of the map data enclosed by or located on its outline

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polygon
definition

two-dimensional type of cartographic feature

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regular parcel
definition

parcel shaped like a rectangle

NOTE Regular parcels on the same generalization level are not intended to overlap.

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place
definition

administrative area of the types: Order-i Area, Country, Supra-National Area, Administrative Place A-Z or Named Area Feature of the types: Built-up Area, Named Area, District

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area
definition

two-dimensional, geographical region on the surface of the earth

NOTE 1 to entry: An area can be represented as an implicit area or an explicit area.

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district
definition

area regarded as a geographical unit, which is defined by the delivery of a specific public or private sector service

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symbol
definition

data model entity that represents an icon associated with a cartographic feature

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point
definition

zero-dimensional element that specifies geometric location specified by one coordinate pair or triplet

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connection point
definition

location point captured in the location reference core, which forms the start point of a path external to the location

NOTE 1 to entry: Connection points are used to connect a location reference extension to a location reference core and to connect linear locations to form a subnetwork. The connection point is identified using its connection point index.

NOTE 2 to entry: The connection point index is implicitly defined by the order of the points in a location reference.

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intersection point (IP)
definition

core point representing an intersection, located at places where the road section signature at the location changes

NOTE 1 to entry: The intersection point is one of the three defined core point types.

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core point (CP)
definition

CP point belonging to the location reference core

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control point
definition

point having known coordinates in the real world and identifiable with a corresponding point in a map or an aerial photograph or satellite image

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shape point
definition

position along a link used to more accurately represent its geometric course, bounded by exactly two segments

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next point
definition

point that is directly (topologically) connected to a given point, in a direction that is defined by the defined direction of the location

NOTE 1 to entry: A point can have zero or more next points.

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intermediate
definition

point, other than a Node, that defines the shape of an Edge

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dummy point
definition

optional entity that represents a position along a link where the link crosses a parcel boundary and does not necessarily coincide with a shape point or node

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location point (LP)
definition

core point that bounds or is located on the location

NOTE 1 to entry: Location points can coincide with intersection points or routing points. The start and the end of the location are always represented by a location point. Additional intermediate location points can be created to represent the shape of the location. The location point is one of the three defined core point types.

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routing point (RP)
definition

point used to reconstruct the location by route calculation

NOTE 1 to entry: RPs are intended to allow point-based matching to the map database of the end user. When such an RP match is found, the location then can be further reconstructed using the connectivity of the road network as represented in the map database of the end user. The routing point is one of the three defined core point types.

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Advisory Point
definition

data model entity that provides information about an approaching condition on a road that may require some action by the driver of a vehicle

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display point
definition

zero-dimensional type of cartographic feature

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semantic relationship
definition

characteristic of a Feature involving other Features

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relationship code
definition

alphanumerical identifier for a Relationship

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relationship type
definition

defined characteristic of a Feature which is dependent on other Features

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relationship name
definition

name associated with a Relationship Type

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junction
definition

data model entity that represents a 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

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next point relation
definition

ordered pair of points (A, B) for which a direct connection exists from A to B along the path of the referenced location

NOTE 1 to entry: In the road network, a direct connection between points A and B exists when point B can be reached from point A via part of the road network, without visiting intermediate points in the location reference.

This excludes points connected in a GDF graph via a node representing an intersection-not-at-grade. Such points are not considered to be directly connected.

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relationship
definition

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.

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place relationship
definition

bivalent relationship between place entities, constituting the place tree linking parent and child places ("place A is in place B")

NOTE Place relationship does not imply strict or complete containment. It is attributed as: address significant, official, postal or useful for reverse geocoding.

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bearing (BR)
definition

angle between a reference direction and the direction to an object measured clockwise

NOTE 1 to entry: Unless otherwise specified, the reference direction is generally understood to be geographic north.

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connection angle (CA)
definition

difference between side road bearing and bearing at a point

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correctness
definition

indication of whether a data item is correctly recorded according to a specified data catalogue

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precision
definition

exactness of the measurement of a data value or of the storage allocated to a measured data value

NOTE 1 to entry: Alternatively, the closeness of measurements of the same phenomenon repeated under exactly the same conditions and using the same techniques.

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accuracy
definition

measure of closeness of results of observations, computations, or estimates to the true values or the values accepted as being true

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resolution
definition

smallest unit which can be represented fixing a limit to precision and accuracy

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connectivity
definition

status of being topologically connected

NOTE 1 to entry: In a graph, two or more edges are said to be connected if they share one or more nodes.

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error rate
definition

percentage of falsehoods

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property
definition

combination of Attribute and Relationship values which pertain to a Feature and which together define a certain characteristic of the Feature

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completeness
definition

extent to which all specified Features are present

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up-to-dateness
definition

closeness in time of the (geographic) data to the present reality

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floating-point number
definition

number capable of being specified by the formula M × 10E where M and E are two integers called the mantissa and the exponent, respectively

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