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1、无定向角导线在导线测量中的应用（Applicationofnondirectionalangletraverseintraversesurvey）Abstract:Thispapermainlydiscussesthecontrolpointscannotpass(nondirectionalcondition)calculationproblemsituationtraversing,andanexampleisdescribed.Keywords:nodirection,rotation,zoomPreface：Nowtherapiddevelopmentofcityconstructi
2、on,especiallytheinternationalmetropolislikeShanghai,edificetoemergelikebambooshootsafteraspringrain,theoriginalcontrolpointswhichmaymakethechangeisnolongervisible,sothereisnoestimateddirectionalazimuthangleofeachwiretothecorner,cannottraversecalculation.Thispaperistointroduceacontrolpointtotwowhent
3、hevisibilitycalculationmethodofthe.1,theclosedconditionofasingletraversewithoutguideangleTheessenceofasingle,nondirectionalwireisasinglesympatheticwire,whichisnotobservedateitherendofthewire,asshowninFigure1TheN-1hasapointtobesingledirectiontraverse,thenecessaryobservationvalueis2(n-1),andtheobserv
4、edvalueofn+(n-1),namelynedgesandN-1traverseangle,sotheredundantobservationnumbern+(n-1)-2(n-1)=1.Becausetheangleisnotmeasured,theredundantobservationconditionisthelengthclosurecondition.2,calculationthinkingThereisnoobservationofthedirectionalanglesatbothendsofasingletraversewirewithoutasingleorien
5、tation.Butitisnecessarytoknowatleastonedirectionalangleforcalculatingtheazimuthofeachtraverse,whichisdifficultforthecalculationoftheadjustmentofsingletraversewithoutalignment.Thesolutionis:firstwiresoftheazimuthangleandazimuthangleasahypothesis,basedontheassumptionthattheinitialcoordinateazimuth,th
6、einitialazimuthangleandthewireangleobservationvalueswerecalculatedforallwireedgeazimuthcalculationvalue,andthenusingtheobservedvalueoftraversecoordinatecalculationoftheendpoint.Duetothedirectionalstartingedgeisnotcorrect(hypothesis)andtheeffectofwireandwireedgeangleobservationerror,willleadtotheend
7、pointcalculationpointandactualpositionisnotconsistent,inordertoeliminatethiscontradiction,thewirefixingedge(picturedaboveinABside)ofknownlengthandazimuthareknownasstandardwireandwirestandardofdirectionalzoo
