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1、Applicationofnondirectionaltraverseintraversesurvey（无定向角导线在导线测量中的应用）Abstract:Thispapermainlydiscussesthecontrolpointscannotpass(nondirectionalcondition)calculationproblemsituationtraversing,andanexampleisdescribed.Keywords:nodirection,rotation,zoomPreface：Nowtherapiddev
2、elopmentofcityconstruction,especiallytheinternationalmetropolislikeShanghai,edificetoemergelikebambooshootsafteraspringrain,theoriginalcontrolpointswhichmaymakethechangeisnolongervisible,sothereisnoestimateddirectionalazimuthangleofeachwiretothecorner,cannottraversecalc
3、ulation.Thispaperistointroduceacontrolpointtotwowhenthevisibilitycalculationmethodofthe.1,theclosedconditionofasingletraversewithoutguideangleTheessenceofasingle,nondirectionalwireisasinglesympatheticwire,whichisnotobservedateitherendofthewire,asshowninFigure1TheN-1hasa
4、pointtobesingledirectiontraverse,thenecessaryobservationvalueis2(n-1),andtheobservedvalueofn+(n-1),namelynedgesandN-1traverseangle,sotheredundantobservationnumbern+(n-1)-2(n-1)=1.Becausetheangleisnotmeasured,theredundantobservationconditionisthelengthclosurecondition.2,
5、calculationthinkingThereisnoobservationofthedirectionalanglesatbothendsofasingletraversewirewithoutasingleorientation.Butitisnecessarytoknowatleastonedirectionalangleforcalculatingtheazimuthofeachtraverse,whichisdifficultforthecalculationoftheadjustmentofsingletraversew
6、ithoutalignment.Thesolutionis:firstwiresoftheazimuthangleandazimuthangleasahypothesis,basedontheassumptionthattheinitialcoordinateazimuth,theinitialazimuthangleandthewireangleobservationvalueswerecalculatedforallwireedgeazimuthcalculationvalue,andthenusingtheobservedval
7、ueoftraversecoordinatecalculationoftheendpoint.Duetothedirectionalstartingedgeisnotcorrect(hypothesis)andtheeffectofwireandwireedgeangleobservationerror,willleadtotheendpointcalculationpointandactualpositionisnotconsistent,inordertoeliminatethiscontradiction,thewirefixi
8、ngedge(picturedaboveinABside)ofknownlengthandazimuthareknownasstandardwireandwirestandardofdirectionalzoomandr
