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left of, is a nade where five segments meet, etc.
topological data brxw-A date bsss lhst
e~sthe ~ms@ d topebgy to irrdiite
the mfalmnahgra of mrtogrepfdi features,
gsometricsfty axprsrsasd as fmints, firms, and
WrfWxw. Comrnonfy ernpfeyad as the bsaie fur
data bssas to bs ussd in gecgrephii
Informstien systems.
Iopologlcal data atructur*A vector dste
strudure whii *6 ths same cfrsredsristii ss
the oheirr-node dete structure, but afeo
esmbfii the lopofagkel refatimcfripe
(connectivity, sdjjcency, and inctusion) between
faetume in a vector dste set.
topological ontltlee-A collsd”mn of ob@s
(i.e., nedes, edg= ad f-) urrad !0 ddii
ths spstisl rekrtioncfripe errrorrg ths features of
the Earth% surface.
topological relrdlonshipe-How dste
ele~nfs relete to esch ather withtn the date
base. In particular, how e change to one
element affects other elements.
Topologlcslly Int*gretod Geegraphlc
and Roeourco Information Syatom
(TfGRIS)-An abject oriented geographm
informetkrn system with a conmlidatad data
st@ure. Developrxt ~ Irrfergmph Caprxrrtlon.
topologlcaf-f%npertiaa of geometti figures
es adjecanq thet are nd etfared by distortion
es Ieng se the surface “S not tom.
topology-Tha wey in which geographml
elements are linked torfether, inducting Ihe
qwstiel retationslipe ~=iting among g-xrgrsphlc
festures and the methods used wtthin the
Wmfmfw efwironment to geomelricalfy depict,
etore, and esemins the data wilhin this retstkrnal
mntest. Topolcgy irwludes adjjerwy,
irrchsion, and connactivii. See also
ed]acency; connactlvlty; Inclusion.
toponymy—1. The study ad treetment of
!oponyms. 2. A trady of toponyms.
MIL-HDBK-850
topon m-A name eppfiad to a natural or
cuifua
~hti~
7 feature. For U.S. Gtwernmerd
governing P&e
usegs,
rswrres
on Es* em estebliahed try the Un~ed Stetea
Boerd on Geographic Namee. AJao celied
geogmphlc name end plaoo Mine. S.afso
daacrlptlva name.
toPPf. Wt*ThCt horimntel a+
v** to the (frorizmtd) qxn sob d a
gyroscope, amumf whiih topple amure.
tOpple-Tfre vertical cmnponsnt of pracss+m
or wender, or the algebs”k sum cd the two.
torsion bafenca-A devke for measuring
mrnbiitiona of the eemnd der+vativee of tha
gravity poteniisl, which are .cloaety ratsted to the
horizart!al components of the ddection of the
vertical. It mrrakzs of a bar susperrdd
horizontally by an ekretic fifement, ona end of
the bar being subjsded to the inffuence of the
ettmcting force to a grseter degree then the
other end. The attracting forca is balenaed end
its cornp.erstive afrsngth meeaumd by the
torsionsl readian of the filament.
tonoloolcal structurincr-The maces of -.. . .. . . .3- ,
or&u&g data Icptagiilly ec Uiat the
total departuree-See ebsclsaa.
relationch~s and reference finkages are
speci%sd.
totel drltt-The algebrsic sum of drift due 10
preoesc”mn and thet due to wander. Alrm callsd
topological vorlficatlon-The promes of drltt.
vwifyfng the tofdogiil ralstkxrah~ betwwn
deta elements.
total latltudes—See ordlnatas.
262
totel magnaUc lntanslty—The vector
resuftenf of tha rntensity of the horisontel and
vertical oemponents d the Earth’s magrrstic
tietd al e apecifii point.
totel etetlon lnstrumerit~ aurwey
instmmem capable d measuring ddta x, y, and
z components without signiksnt afferetiins.
touch plete-See klsrr plrNa.
town pfen Inset—See Inset.
town site sunrey-The rrddng of tines end
comers within one or more regular units of the
towmshii subdwision by w?rfch the fend Is divided
into bfocks, etrsats, end alleys as a besis for the
dispassl of tiile in parcels of land.
township corner+ corner of a township.
See also clorrlng township comer.