9SPATIALSTRUCTUREANDPERFORMANCEOFMETROPOLIS:INTERPRETATIONANDAP-PLICATIONOFPOLYCENTRICSTRUCTUREWEIYaping;ZHAOMinABSTRACT:Basedontheeconomicinterpretationoftheurbanpolycentricdevelopment,thispaperin-troducestheprerequisiteofthepolycentricspatialstructure.Itpresentsamethodtomeasuretheper-formanceofthespatialstructure.Thenitextendsfourmodesofthestructureinthemetropolitanareaandbringsforwardsproblemsofdensely-developedmetropolitanareasinthespatialdevelopment,aswellasitsguidingdirections.KEYWORDS:performanceofspatialstructure;polycentric;metropolitanareadevelopmentPlanningStudiesVOL.30NO.4APR.2006102006304CITYPLANNINGREVIEW11Fig.1IllustrationofdensityperformanceFig.2IllustrationofspreadperformancePlanningStudiesVOL.30NO.4APR.2006122006304CITYPLANNINGREVIEWFig.3Illustrationofpopulationdensitygradationper-formance13Fig.4IllustrationofODperformancePlanningStudiesVOL.30NO.4APR.2006142006304CITYPLANNINGREVIEWFig.5IncompactpolycentricmodelFig.6SuburbanpolycentricmodelFig.7ExtremelydisproportionatepolycentricmodelFig.8Extendedandcompactpolycentricmodel15PlanningStudiesVOL.30NO.4APR.2006162006304CITYPLANNINGREVIEW