248
Annexes
EXAMPLE
An odometer used in eonjunetion with predefined mile or kilometre origin points along a route provides a linear referenee to a position.
linear reference system
referenee system that identifies a loeation by referenee to a segment of a linear geographie feature and distanee along that segment from a given point (IS048 2002)
NOTE
Linear referenee systems are widely used in transportation, for example highway name and mile or kilometre marker.
location
identifiable geographie plaee (IS044 2001)
EXAMPLE
"Eiffel Tower", "Madrid", "California"
map projection
eoordinate eonversion from a geodetie eoordinate system to a plane (IS043 2003)
mean sea level
average level of the surfaee of the sea over all stages of tide and seasonal variations
(IS0432003)
NOTE
Mean sea level in a loeal eontext normally means mean sea level
for the region ealculated from observations at one or more points over a given period
of time. Mean sea level in aglobaI eontext differs from a global geoid by not more
than 2 metres.
medium
substanee or ageney for storing or transmitting data (IS050 2002)
EXAMPLE
Compaet dise, Internet, radio waves, ete.
meridian
interseetion of an ellipsoid by a plane eontaining the semi-minor axis ofthe ellipsoid
(lS043 2003)
NOTE
This term is often used for the pole-to-pole are rather than the
eomplete c10sed figure.
metadata
data about data (IS047 2003)
metadata element
diserete unit ofmetadata (IS047 2003)
NOTE 1
Metadata elements are unique within a metadata entity.
NOTE 2
Equivalent to an attribute in UML terminology.
metadata entity
set ofmetadata elements deseribing the same aspeet of data (IS047 2003)
NOTE 1
May eontain one or more metadata entities.
NOTE 2
Equivalent to a c1ass in UML terminology.
Annexes
EXAMPLE
An odometer used in eonjunetion with predefined mile or kilometre origin points along a route provides a linear referenee to a position.
linear reference system
referenee system that identifies a loeation by referenee to a segment of a linear geographie feature and distanee along that segment from a given point (IS048 2002)
NOTE
Linear referenee systems are widely used in transportation, for example highway name and mile or kilometre marker.
location
identifiable geographie plaee (IS044 2001)
EXAMPLE
"Eiffel Tower", "Madrid", "California"
map projection
eoordinate eonversion from a geodetie eoordinate system to a plane (IS043 2003)
mean sea level
average level of the surfaee of the sea over all stages of tide and seasonal variations
(IS0432003)
NOTE
Mean sea level in a loeal eontext normally means mean sea level
for the region ealculated from observations at one or more points over a given period
of time. Mean sea level in aglobaI eontext differs from a global geoid by not more
than 2 metres.
medium
substanee or ageney for storing or transmitting data (IS050 2002)
EXAMPLE
Compaet dise, Internet, radio waves, ete.
meridian
interseetion of an ellipsoid by a plane eontaining the semi-minor axis ofthe ellipsoid
(lS043 2003)
NOTE
This term is often used for the pole-to-pole are rather than the
eomplete c10sed figure.
metadata
data about data (IS047 2003)
metadata element
diserete unit ofmetadata (IS047 2003)
NOTE 1
Metadata elements are unique within a metadata entity.
NOTE 2
Equivalent to an attribute in UML terminology.
metadata entity
set ofmetadata elements deseribing the same aspeet of data (IS047 2003)
NOTE 1
May eontain one or more metadata entities.
NOTE 2
Equivalent to a c1ass in UML terminology.