# ISO 19108:2002 pdf download

ISO 19108:2002 pdf download.Geographic information – Temporal schema.

4.1.13

feature substitution

feature succession in which one feature instance is replaced by another feature instance of the same or different feature type

EXAMPLE An instance of feature type “building” is razed and replaced by an instance of feature type “parking lot”.

4.1.14

feature succession

replacement of one or more feature instances by other feature instances, such that the first feature instances cease to exist

4.1.15

geometric primitive

object representing a single, connected, homogeneous element of space [ISO 19107]

NOTE Geometric primitives are non-decomposed objects that present information about geometric configuration. They include points, curves, surfaces, and solids.

4.1.16

Gregorian calendar

calendar in general use; first introduced in 1582 to define a year that more closely approximated the tropical year than the Julian calendar [adapted from ISO 8601:2000]

NOTE I The introduction of the Gregorian calendar included the cancellation of the accumulated inaccuracies of the Julian year. In the Gregorian calendar, a calendar year is either a common year or a leap year; each year is divided into 12 sequential months.

4.1.17

instant

0-dimensional geometric primitive representing position in time

NOTE The geometry of time is discussed in 5.2.

4.1.18

interval scale

scale with an arbitrary origin which can be used to describe both ordering of values and distances between values

NOTE Ratios of values measured on an interval scale have no meaning.

4.1.19

Julian date

Julian day number followed by the decimal fraction of the day elapsed since the preceding noon

4.1.20

Julian day number

number of days elapsed since Greenwich mean noon on 1 January47l3 BC, Julian proleptic calendar

4.1.21

life span

period during which something exists

NOTE Valid-time life span is the period during which an object exists in the modelled reality. Transaction-time life span is the period during which a database object is current in the database.

4.1.22

month

period approximately equal in duration to the periodic time of a lunar cycle

NOTE The duration of a month is an integer number of days. The number of days in a month is determined by the rules of the particular calendar.

4.1.23

node

0-dimensional topological primitive [ISO 19107]

NOTE The boundary of a node is the empty set.

4.1.24

ordinal era

one of a set of named periods ordered in time

4.1.25

ordinal scale

scale which provides a basis for measuring only the relative position of an object

4.1.26

ordinal temporal reference system

temporal reference system composed of ordinal eras

4.1.27

period

one-dimensional geometric primitive representing extent in time

NOTE A period is bounded by two different temporal positions.

4.1.28

periodic time

duration of one cycle [adapted from ISO 31-2:1992]

4.1.29

point

0-dimensional geometric primitive, representing a position [ISO 19107]

NOTE The boundary of a point is the empty set.

4.1.30

temporal coordinate

distance from the origin of the interval scale used as the basis for a temporal coordinate system

4.1.31

temporal coordinate system

temporal reference system based on an interval scale on which distance is measured as a multiple of a single unit of time

4.1.32

temporal feature association

feature association characterized by a reference to time or to a temporal constraint

4.1.33

temporal feature operation

feature operation specified as a function of time

4.1.34

temporal position

location relative to a temporal reference system.

4.1.35

temporal reference system reference system against which time is measured

4.1.36

topological complex

collection of topological primitives that is closed under the boundary operations [ISO 19107]

NOTE Closed under the boundary operations means that if a topological primitive is in the topological complex, then its boundary objects are also in the topological complex.

4.1.37

topological primitive

topological object that represents a single, non-decomposable element [ISO 19107]

NOTE A topological primitive corresponds to the interior of a geometric primitive of the same dimension in a geometric realization.

4.1.38

transaction time

time when a fact is current in a database and may be retrieved [Jensen et al. (1994)]

4.1.39

valid time

time when a fact is true in the abstracted reality [Jensen et al. (1994)]

4.2 Abbreviated terms

For the purposes of this International Standard, the following abbreviations apply.

AD Anno Domini

BC Before Christ

GPS Global Positioning System

TOW Time of Week

UML Unified Modeling Language

UTC Coordinated Universal Time

WN Week Number.