A full resolution elevation representation requiring three bits per pixelSHAFFER, C. A.Lecture notes in computer science. 1990, Vol 409, pp 45-64, issn 0302-9743Conference Paper

A formula for computing the number of quadtree node fragment created by a shiftSHAFFER, C. A.Pattern recognition letters. 1988, Vol 7, Num 1, pp 45-49, issn 0167-8655Article

Optimal quadtree construction algorithmsSHAFFER, C. A; SAMET, H.Computer vision, graphics, and image processing. 1987, Vol 37, Num 3, pp 402-419, issn 0734-189XArticle

A model for the analysis of neighbor finding in pointer-based quadtreesSAMET, H; SHAFFER, C. A.IEEE transactions on pattern analysis and machine intelligence. 1985, Vol 7, Num 6, pp 717-720, issn 0162-8828Article

A real-time robot arm collision avoidance systemSHAFFER, C. A; HERB, G. M.IEEE transactions on robotics and automation. 1992, Vol 8, Num 2, pp 149-160, issn 1042-296XArticle

Quadtree region representation in cartography: experimental resultsSAMET, H; ROSENFELD, A; SHAFFER, C. A et al.IEEE transactions on systems, man, and cybernetics. 1983, Vol 13, Num 6, pp 1148-1154, issn 0018-9472Article

Analysis of the worst case space complexity of a PR quadtreePEMMARAJU, S. V; SHAFFER, C. A.Information processing letters. 1994, Vol 49, Num 5, pp 263-267, issn 0020-0190Article

Hierarchical data structures for geographic information. Abstract = Structures hiérarchiques des données appliquées à l'information géographique. Résumé = Hierarchische Datenstrukturen für geographische InformationenSAMET, H; SHAFFER, C. A; NELSON, R. C et al.Geologisches Jahrbuch. Reihe A, Allgemeine und regionale Geologie BR Deutschland und Nachbargebiete, Tektonik, Stratigraphie, Paläontologie. 1988, Num 104, pp 97-98, issn 0341-6399Article

Digitazing the plane with cells of nonuniform sizeSAMET, H; SHAFFER, C. A; WEBBER, R. E et al.Information processing letters. 1987, Vol 24, Num 6, pp 369-375, issn 0020-0190Article