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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
2、：Nowtherapiddevelopmentofcityconstruction,especiallytheinternationalmetropolislikeShanghai,edificetoemergelikebambooshootsafteraspringrain,theoriginalcontrolpointswhichmaymakethechangeisnolongervisible,sothereisnoestimateddirectionalazimuthangleofeachwiretothe
3、corner,cannottraversecalculation.Thispaperistointroduceacontrolpointtotwowhenthevisibilitycalculationmethodofthe.1,theclosedconditionofasingletraversewithoutguideangleTheessenceofasingle,nondirectionalwireisasinglesympatheticwire,whichisnotobservedateitherendo
4、fthewire,asshowninFigure1TheN-1hasapointtobesingledirectiontraverse,thenecessaryobservationvalueis2(n-1),andtheobservedvalueofn+(n-1),namelynedgesandN-1traverseangle,sotheredundantobservationnumbern+(n-1)-2(n-1)=1.Becausetheangleisnotmeasured,theredundantobser
5、vationconditionisthelengthclosurecondition.2,calculationthinkingThereisnoobservationofthedirectionalanglesatbothendsofasingletraversewirewithoutasingleorientation.Butitisnecessarytoknowatleastonedirectionalangleforcalculatingtheazimuthofeachtraverse,whichisdif
6、ficultforthecalculationoftheadjustmentofsingletraversewithoutalignment.Thesolutionis:firstwiresoftheazimuthangleandazimuthangleasahypothesis,basedontheassumptionthattheinitialcoordinateazimuth,theinitialazimuthangleandthewireangleobservationvalueswerecalculate
7、dforallwireedgeazimuthcalculationvalue,andthenusingtheobservedvalueoftraversecoordinatecalculationoftheendpoint.Duetothedirectionalstartingedgeisnotcorrect(hypothesis)andtheeffectofwireandwireedgeangleobservationerror,willleadtotheendpointcalculationpointandac
8、tualpositionisnotconsistent,inordertoeliminatethiscontradiction,thewirefixingedge(picturedaboveinABside)ofknownlengthandazimuthareknownasstandardwireandwirestandardofdirectionalzoo
