ScienceandTechnology,Guilin541004,China)РAI~traet:ordancewiththebasicprincipleoftheleastРsquareinspectiononthetenpointheightofmicrocosmicunflatnessРofsurfaceroughnessandthetheoryofuncertaintydegreeofnewРgenerationalGeometricalProductSpecification(GPS)standard,aРkindofca]culationmethodonuncertaintydegreeofthetenpointРheightmeasurementofmicrocosmicunflatnesswasproposed,titusРensuredtheintegralityandeffectivenessofthemeasuredresultonРtenpointheightofmicrocosmicunflatness.TheexperimentalresultРshowedthatthemeasuredresultoftenpointheightofmicrocosmicРunflatnessanditsuncertaintydegreecanbeevaluatedquantitativelyРordingtothejudgingprinciplepresen-РtedbyISO14253—1.РKeywords:tenpointheightofmicrocosmicunflatness;Geo?РmetricalProductSpecification(GPS);degreeofuncertaintyРFig2Tab1Ref7"JixieSheji"7056