In qualitative motion representation, frames of reference play an important role as well in measuring of the motion data as
in representation and application of algorithms. This paper discusses motion representation in egocentric and allocentric
frames of reference and begins with some general considerations on motion representation through qualitative distances and
directions that apply to both technical and biological systems. An approach that involves incremental numeric generalization
of a numerically represented motion track and subsequent transformation in a qualitative representation has advantages for
technical systems, though. Last, algorithms for generalizing qualitatively represented motion tracks in egocentric and allocentric
frames of reference are presented.
Keywords Spatial Reasoning - Qualitative Reasoning - Representation of Spatio-temporal Knowledge - Spatial Reference Frames