TechnicalStandards"andtherequirementsoftheРdesigner,designtheairportclearanceareapermissionheightmodel,andthenOverlayanalysiswiththeDSMdataРobtainedfromthepointclouddataprocessingtoobtaintheareasthatexceedthelimitsurface,andthenvisuallyРjudgetheobstaclesintheseareasthroughtheorthophoto,checkthroughthepointclouddata,andfinallyextractРthesuperelevationobstacle.TakingtheexpansionprojectofShaoguanAirportasanexample,thispaperconductsРextractionanalysis,providessupportforthedesignoftheflightcontrolprogramofShaoguanAirport,hasachievedРgoodsocialandeconomicbenefits,andcanalsoprovideareferenceforotherairportclearanceareastoextractРobstacles.Р Keywords： ； ； ；Р AirportClearance ObstacleRestrictionSurface ObstacleExtraction GIS
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