Annex A: Terms and definitions ofthe ISO 19100 standards
251
performance indicator
internal parameters of positioning systems indieative of the level of performance
aehieved (lS048 2002)
NOTE
Performance indieators ean be used as quality eontrol evidenee of
the positioning system and/or positioning solution. Internal quality eontrol may include such faetors as signal strength of reeeived radio signals (signal-to-noise ratio
(SNR)), figures indieating the dilution of preeision (DOP) due to geometrie eonstraints in radioloeation systems, and system speeifie figure of merit (FOM).
period
one dimensional geometrie primitive representing extent in time (lS040 2002)
NOTE
Aperiod is bounded by two different temporal positions
periodic time
duration of one eycle (lS005 1992, IS040 2002)
planar topological complex
topologieal eomplex that has a geometrie realization that ean be embedded In
Euclidean 2 spaee (lS039 2003)
point
O-dimensional geometrie primitive, representing a position (lS039 2003)
NOTE
The boundary of a point is the empty set.
polar coordinate system
eoordinate system in whieh position is speeified by distanee and direetion from the
origin (lS043 2003)
NOTE
In three dimensions also ealled spherieal eoordinate system.
population
totality ofitems under eonsideration (lSOI4 1993, IS046 2001)
EXAMPLE 1
All points in a dataset.
EXAMPLE 2
Names of all roads in a eertain geographie area.
portrayal
representation of geographie information to humans (lS034 2002)
portrayal catalogue
eolleetion of all defined portrayals (lS049 2002)
portrayal rule
rule that is applied to the feature to determine what portrayal speeifieation to use
(lS049 2002)
portrayal service
generie interface used to portray features (lS049 2002)
251
performance indicator
internal parameters of positioning systems indieative of the level of performance
aehieved (lS048 2002)
NOTE
Performance indieators ean be used as quality eontrol evidenee of
the positioning system and/or positioning solution. Internal quality eontrol may include such faetors as signal strength of reeeived radio signals (signal-to-noise ratio
(SNR)), figures indieating the dilution of preeision (DOP) due to geometrie eonstraints in radioloeation systems, and system speeifie figure of merit (FOM).
period
one dimensional geometrie primitive representing extent in time (lS040 2002)
NOTE
Aperiod is bounded by two different temporal positions
periodic time
duration of one eycle (lS005 1992, IS040 2002)
planar topological complex
topologieal eomplex that has a geometrie realization that ean be embedded In
Euclidean 2 spaee (lS039 2003)
point
O-dimensional geometrie primitive, representing a position (lS039 2003)
NOTE
The boundary of a point is the empty set.
polar coordinate system
eoordinate system in whieh position is speeified by distanee and direetion from the
origin (lS043 2003)
NOTE
In three dimensions also ealled spherieal eoordinate system.
population
totality ofitems under eonsideration (lSOI4 1993, IS046 2001)
EXAMPLE 1
All points in a dataset.
EXAMPLE 2
Names of all roads in a eertain geographie area.
portrayal
representation of geographie information to humans (lS034 2002)
portrayal catalogue
eolleetion of all defined portrayals (lS049 2002)
portrayal rule
rule that is applied to the feature to determine what portrayal speeifieation to use
(lS049 2002)
portrayal service
generie interface used to portray features (lS049 2002)