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Vol: 60(74) No: 2 / June 2015 Evaluation of Feature Parameters from Coordinate Measurement Data Using Computational Geometry György Hermann Department of Applied Mathematics, Óbuda University, Bécsi út 96B, H-1034 Budapest, Hungary, phone: (361) 666-5539, e-mail: hermann.gyula@nik.uni-obuda.hu Gyula Hermann Department of Applied Mathematics, Óbuda University , Bécsi út 96B, H-1034 Budapest, Hungary, phone: (361) 666-5539, e-mail: hermann.gyorgy@nik.uni-obuda.hu Keywords: minimum zone, Lp-norm, straightness, flatness, circularity, sphericity Abstract Coordinate measuring machines are used to capture data points from an actual surface. The measurement data must be evaluated to yield critical geometric deviations according to the requirements specified by the designer. Functional requirements or assembly conditions on a manufactured part are normally translated into geometric constraints to which the part must conform. 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