datum 音标拼音: [d'ætəm] [d'etəm]
n . 材料,资料,已知数
材料,资料,已知数
datum 资料
D datum 资料
datum n 1 :
an item of factual information derived from measurement or research [
synonym : {
datum }, {
data point }]
Datum \
Da "
tum \,
n .;
pl . {
Data }. [
L .
See 2d {
Date }.]
1 .
Something given or admitted ;
a fact or principle granted ;
that upon which an inference or an argument is based ; --
used chiefly in the plural .
[
1913 Webster ]
Any writer ,
therefore ,
who . . .
furnishes us with data sufficient to determine the time in which he wrote . --
Priestley .
[
1913 Webster ]
2 .
a single piece of information ;
a fact ;
especially a piece of information obtained by observation or experiment ; --
used mostly in the plural .
[
PJC ]
3 .
pl . (
Math .)
The quantities or relations which are assumed to be given in any problem .
[
1913 Webster ]
4 . (
Surveying )
a point ,
line ,
or level surface used as a reference in measuring elevations . --
RHUD [
PJC ]
{
Datum line } (
Surv .),
the horizontal or base line ,
from which the heights of points are reckoned or measured ,
as in the plan of a railway ,
etc .
[
1913 Webster ]
146 Moby Thesaurus words for "
datum ":
absolute fact ,
accepted fact ,
account ,
acquaintance ,
actual fact ,
admitted fact ,
announcement ,
article ,
aspect ,
axiom ,
bald fact ,
bare fact ,
basis for belief ,
blue book ,
body of evidence ,
briefing ,
brutal fact ,
bulletin ,
case ,
chain of evidence ,
circumstance ,
clue ,
cold fact ,
communication ,
communique ,
conceded fact ,
corpus ,
count ,
data ,
demonstrable fact ,
detail ,
directory ,
dispatch ,
documentation ,
element ,
empirical fact ,
enlightenment ,
established fact ,
evidence ,
exhibit ,
experience ,
expertise ,
facet ,
fact ,
fact of experience ,
factor ,
facts ,
factual base ,
factual information ,
familiarity ,
familiarization ,
gen ,
general information ,
given fact ,
grounds ,
grounds for belief ,
guidebook ,
handout ,
hard fact ,
hard information ,
incidental ,
incidental information ,
indication ,
indisputable fact ,
inescapable fact ,
info ,
information ,
instance ,
instruction ,
intelligence ,
intimacy ,
item ,
item of evidence ,
ken ,
know -
how ,
knowing ,
knowledge ,
light ,
manifestation ,
mark ,
material grounds ,
matter ,
matter of fact ,
mention ,
message ,
minor detail ,
minutia ,
minutiae ,
muniments ,
mute witness ,
naked fact ,
not guesswork ,
not opinion ,
notice ,
notification ,
particular ,
piece of evidence ,
plain ,
point ,
positive fact ,
postulate ,
practical knowledge ,
premises ,
presentation ,
private knowledge ,
privity ,
promotional material ,
proof ,
provable fact ,
publication ,
publicity ,
ratio cognoscendi ,
reason to believe ,
regard ,
release ,
relevant fact ,
report ,
respect ,
salient fact ,
self -
evident fact ,
self -
knowledge ,
sidelight ,
sign ,
significant fact ,
simple fact ,
sober fact ,
statement ,
stubborn fact ,
symptom ,
technic ,
technics ,
technique ,
the case ,
the dope ,
the goods ,
the know ,
the nitty -
gritty ,
the scoop ,
thing ,
token ,
transmission ,
undeniable fact ,
well -
known fact ,
white book ,
white paper ,
word
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Datums and Reference Frames | Datums | National Geodetic Survey A geodetic datum or reference frame is an abstract coordinate system with a reference surface (such as sea level) that serves to provide known locations to begin surveys and create maps
Geodetic datum - Wikipedia The WGS 84 datum, within two meters of the NAD 83 datum used in North America, is the only world referencing system in place today WGS 84 is the default standard datum for coordinates stored in recreational and commercial GPS units
DATUM Definition Meaning - Merriam-Webster The meaning of DATUM is something given or admitted especially as a basis for reasoning or inference How to use datum in a sentence
What Are Datums? A guide to all their types and applications. A datum feature refers to the physical part of the object which is used as reference for a datum It may be a particular point, line, plane or surface on the part
DATUM Definition Meaning | Dictionary. com DATUM definition: a single piece of information, as a fact, statistic, or code; an item of data See examples of datum used in a sentence
datum - Wiktionary, the free dictionary Something known or assumed as fact, and is made the basis of reasoning or inference which an intellectual system of any sort (such as knowledge or theoretical framework) is constructed
DATUM | English meaning - Cambridge Dictionary A common datum point is used throughout all the experiments as a reference point
GSP 270: Datums Defined A datum provides a reference for the geographic coordinates we use to reference data to the earth For hundreds of years, datums were established in each area for the data to be referenced to within that area
Datum 101: Getting Your Coordinates Right - Complete Guide Learn about geodetic datums and how they affect GPS coordinates Complete guide to understanding datum shifts and coordinate accuracy for navigation and GIS work
datum | Documentation - Esri Developer A datum is a mathematical model of the Earth's shape used to measure locations (horizontal datums) and elevations (vertical datums)