- A
geodetic datum or
geodetic system (also:
geodetic reference datum,
geodetic reference system, or
geodetic reference frame, or
terrestrial reference frame)...
- heights. A
chart datum is
generally derived from some
tidal phase, in
which case it is also
known as a
tidal datum.
Common chart datums are
lowest astronomical...
- A
datum reference or just
datum (plural:
datums) is some
important part of an object—such as a point,
line, plane, hole, set of holes, or pair of surfaces—that...
- The
North American Datum (NAD) is the
horizontal datum now used to
define the
geodetic network in
North America. A
datum is a
formal description of the...
- standards, also
includes a
choice of
geodetic datum (including an
Earth ellipsoid), as
different datums will
yield different latitude and
longitude values...
-
there are a
number of
measurements that are important.
Sight line, a
datum line along the
line of
visual aim,
extending axially to all
points necessary for...
-
direction as a
reference line, or plumb-
line. It is a
precursor to the
spirit level and used to
establish a
vertical datum. It is
typically made of stone...
-
standard pitch diameter.
Profile shift Displacement of the
basic rack
datum line from the
reference cylinder, made non-dimensional by
dividing by the normal...
- In aviation,
reference datum height (RDH) is the
height of a point,
located above the
intersection of the
runway centre line and the threshold, through...
-
approximate mean
latitude of 39°43′20″ N (
Datum WGS 84). In reality, the east-west Mason–Dixon
line is not a true
straight line in the
geometric sense, but is instead...
