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Annexes
NOTE
In most cases, the geodetic datum include an ellipsoid definition.
ellipsoidal height, geodetic height h
distance of a point from the ellipsoid measured along the perpendicular from the ellipsoid to this point positive ifupwards or outside ofthe ellipsoid (lS043 2003)
NOTE
Only used as part of a three-dimensional geodetic coordinate system and never on its owo.
encapsulation
collection of specified data content in a well-defined coding structure or the process
by which it is done (lS052 2001)
encoding
conversion of data into aseries of codes (lS050 2002)
encoding rule
identifiable collection of conversion rules that define the encoding for a particular
data structure (lS050 2002)
EXAMPLE
XML, ISO/lEe 8211.
NOTE
An encoding rule specifies the types of data to be converted as well
as the syntax, structure and codes used in the resulting data structure.
encoding service
software component that has an encoding rule implemented (lS050 2002)
end node
node in the boundary of an edge that corresponds to the end point of that edge as a
curve in any valid
geometrie realization of a topological complex in which the edge is used (lS039
2003)
end point
last point of a curve (IS039 2003)
engineering datum
loeal datum
datum deseribing the relationship of a eoordinate system to a loeal referenee (lS043
2003)
NOTE
Engineering datum excludes both geodetie and vertieal datums.
EXAMPLE
A system for identifying relative positions within a few kilometres
of the referenee point.
event
action whieh oeeurs at an instant (lS040 2002)
executable test case