ISO 20524-1:2020 高度道路交通システム—地理データファイル（GDF）GDF5.1 —パート1：複数のソース間で共有されるアプリケーションに依存しない地図データ | ページ 6

3.1.1

地図プリミティブ

地図表現における原子構成要素

3.1.2

データファイル

同種の構造を持つ関連するデータレコードの集まり

3.1.3

データ記録

地物関連データを含むレコード

3.1.4

世界記録

データレコードに論理的に先行し、コンパニオンデータレコードを解釈するために必要な制御パラメータ、データ定義、および文書を含むレコード。

3.1.5

ミディアムユニット

物理的に分割されていない全体と見なされるデータストレージのオブジェクト。

3.1.6

マルチメディア

従来のデータ以外のあらゆる種類のデータ

3.1.7

マルチメディアオブジェクト

アプリケーションによって処理されるマルチメディアの断片

3.1.8

繰り返し属性タイプ

特定のフィーチャ クラスの同じインスタンスに関連付けられた複数の値を持つ可能性のある属性タイプ

3.1.9

空間ドメイン

特定のデータセットが空間的に属する地理的領域の境界の記述

3.1.10

ソース素材

あらゆる種類のデータ媒体に保存されたアナログまたはデジタル表現のデータの起源

3.1.11

トポロジー

絶え間ない変化の後に保存される幾何学的構造の特性を扱う数学の分野

3.1.12

転記

非アルファベット文字からアルファベット文字へ、またはその逆への地名のレンダリング

注記1:この用語は、これまでに書かれていない名前の台本への最初の記録にも適用される。

3.2.1

Area Feature

two-dimensional Feature, defined by one or more Faces

3.2.2

Edge

directed sequence of non-intersecting Line Segments with Nodes at each end

3.2.3

enclave

small part of an area enclosed by another area, seen from the area to which that part belongs

3.2.4

exclave

small part of an area enclosed by another area, seen from the enclosing area

3.2.5

Face

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 1 to entry: The Face is the atomic two-dimensional element.

3.2.6

graph

set of points and a set of arrows, with each arrow joining one point to another, whereby the points are called Nodes of the graph, and the arrows are called the Edges of the graph

3.2.7

Intermediate Point

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

3.2.8

Line Feature

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

3.2.9

Node

zero-dimensional element that is a topological junction of two or more Edges, or an end point of an Edge

3.2.10

non-planar graph

graph which may not be embedded in a plane

3.2.11

planar graph

graph which may be embedded in a plane, i.e. it may be drawn on the plane so that Edges intersect only at a Node mutually incident with them

3.2.12

point

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

3.2.13

Line Segment

Segment

direct connection between two Intermediate Points, two Nodes or a Node and an Intermediate Point

3.2.14

valency

degree

number of Edges which are incident with a particular Node

3.3.1

control point

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

3.3.2

ellipsoidal height

distance between a point and the reference ellipsoid, measured along the ellipsoidal normal

3.3.3

geodetic datum

mathematical surface that approximates a portion of the earth's surface

3.3.4

geoid

model of the figure of the earth that coincides with the mean sea level over the oceans and continues in continental areas as an imaginary sea level surface, defined by spirit level

Note 1 to entry: At every place, geoid level/surface is perpendicular to the pull of gravity. The shape is irregular but may, for most purposes, be approximated by an oblate ellipsoid.

3.3.5

Geoid Undulation

difference between the orthometric height and the ellipsoidal height, measured along the ellipsoid normal

3.3.6

height

elevation

(vertical) distance between a point and the reference height level or the reference ellipsoid

Note 1 to entry: On land maps, the reference level is commonly the mean sea level.

3.3.7

horizontal reference system

reference system for positions

3.3.8

magnetic declination

angle between Magnetic North and True North

3.3.9

map projection

transformation method used to represent the curved earth surface on a plane

3.3.10

offset

pair of values subtracted from all coordinate values in order to shorten these coordinate values

3.3.11

orthometric height

distance between a point and the geoid, measured along the perpendicular line

3.3.12

reference ellipsoid

oblate ellipsoid of revolution that is used to approximate the figure of the geoid

Note 1 to entry: It is specified by two parameters: a semi-major axis a (equatorial radius of the earth) and a semi-minor axis b (polar radius). The flattening f is defined as: f = (a − b)a.

3.3.13

reference height level

level to which all terrestrial heights are referred

Note 1 to entry: It changes from country to country and it forms part of the national coordinate system for surveying and mapping.

3.3.14

reference system

coordinate system on which a national survey is based

3.3.15

vertical reference system

reference system for elevations

3.3.16

world geodetic system

WGS

set of standard reference ellipsoids that define latitude, longitude and height for every point on the earth

3.4.1

Album

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

3.4.2

Attribute

characteristic of a Feature which is independent of other Features

3.4.3

Attribute Code

alphanumeric identifier for an Attribute Type

3.4.4

Attribute Name

name associated to an Attribute Type

3.4.5

Attribute Type

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

3.4.6

Attribute Value

specific quality or quantity assigned to an Attribute

3.4.7

Dataset

sub-division of Album, which in turn may be sub-divided into Sections

Note 1 to entry: A large set of data covering a particular geographic area may be considered a Dataset.

3.4.8

District

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

3.4.9

Feature

database representation of a real-world object

3.4.10

Feature Category

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

3.4.11

Feature Class

categorization of a Feature

3.4.12

Feature Class Code

alphanumeric identifier for a Feature Class

3.4.13

Feature Name

name associated with a Feature Class

3.4.14

Feature Theme

specified group of related Features

3.4.15

field

set of characters representing one unit of data

3.4.16

Layer

certain subset of a Dataset based upon information contents

3.4.17

Manoeuvre

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

3.4.18

Place

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

3.4.19

Property

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

3.4.20

Relationship Code

alphanumerical identifier for a Relationship

3.4.21

Relationship name

name associated with a Relationship Type

3.4.22

Relationship Type

defined characteristic of a Feature which is dependent on other Features

3.4.23

Semantic Relationship

Relationship

characteristic of a Feature involving other Features

3.4.24

Section

spatial subset of a Dataset

Note 1 to entry: The coverage area of a map sheet, confined by geographic coordinates, may be considered a Section.

3.4.25

Transportation Element

Road Element, Pathway, Railway Element, Path, Ferry Connection, Water Body, Water Boundary Element, Junction, Railway Element Junction or Water Boundary Junction

3.4.26

turn

ordered sequence of a Road Element, a Junction and a Road Element

Note 1 to entry: A turn is a special case of a Manœuvre, relating exactly two Road Elements.

3.4.27

Volume

smallest physical unit of a medium

Note 1 to entry: A single Volume may contain one or more GDF Datasets depending on Dataset size.