Project 1746, ISO 19141:2008 - Geographic
information - Schema for moving features
ISO 19141:2008 defines a method to describe the geometry of a feature that
moves as a rigid body. Such movement has the following characteristics.
The feature moves within any domain composed of spatial objects as specified
in ISO 19107.
The feature may move along a planned route, but it may deviate from the planned
route.
Motion may be influenced by physical forces, such as orbital, gravitational,
or inertial forces.
Motion of a feature may influence or be influenced by other features, for
example:
The moving feature might follow a predefined route (e.g. road), perhaps part
of a network, and might change routes at known points (e.g. bus stops, waypoints).
Two or more moving features may be “pulled” together or pushed apart (e.g.
an airplane will be refuelled during flight, a predator detects and tracks
a prey, refugee groups join forces).
Two or more moving features may be constrained to maintain a given spatial
relationship for some period (e.g. tractor and trailer, convoy).
ISO 19141:2008 does not address other types of change to the feature. Examples
of changes that are not adressed include the following:
The deformation of features.
The succession of either features or their associations.
The change of non-spatial attributes of features.
The feature's geometric representation cannot be embedded in a geometric
complex that contains the geometric representations of other features, since
this would require the other features' representations to be updated as the
feature moves.
Because ISO 19141:2008 is concerned with the geometric description of feature
movement, it does not specify a mechanism for describing feature motion in
terms of geographic identifiers. This is done, in part, in ISO 19133.