T. Kampke, STORING AND RETRIEVING CHANGES IN A SEQUENCE OF POLYGONS, International journal of geographical information systems, 8(6), 1994, pp. 493-513
Several notions of optimality are introduced for two-dimensional geome
tric versioning of polygons. The storage required for a series of vers
ions is minimized by determining references and restating versions fro
m the references. Structural properties are presented as well as algor
ithms which yield optimal or near-optimal references for some of the o
ptimality notions. Several of the algorithms are shown to be efficient
.