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1、實(shí)用標(biāo)準(zhǔn)摘要隨著測(cè)繪事業(yè)的迅速發(fā)展,全球一體化的形成,要求測(cè)繪資料形成統(tǒng)一規(guī)范,坐標(biāo)系統(tǒng)的統(tǒng)一就是其中的一方面?,F(xiàn)在國(guó)家采用的坐標(biāo)系統(tǒng)有北京54坐標(biāo)系、西安80坐標(biāo)系、WGS84坐標(biāo)系,國(guó)家2000坐標(biāo)系以及各地方坐標(biāo)系,它們選擇的橢球參考系不同,通過(guò)不同坐標(biāo)系之間的轉(zhuǎn)換來(lái)滿(mǎn)足不同工程測(cè)量的需求。在同一坐標(biāo)系下又有不同的坐標(biāo)表示方式,例如大地坐標(biāo)、空間直角坐標(biāo)、平面坐標(biāo)。不同坐標(biāo)系之間的相互轉(zhuǎn)換,相同坐標(biāo)系下不同坐標(biāo)之間的轉(zhuǎn)換,都會(huì)運(yùn)用各自對(duì)應(yīng)的轉(zhuǎn)換模型進(jìn)行轉(zhuǎn)換。不同坐標(biāo)系之間的相互轉(zhuǎn)換,本文中主要采用了三
2、種模型,即三參數(shù)模型、四參數(shù)模型和七參數(shù)模型。相同坐標(biāo)系下的坐標(biāo)轉(zhuǎn)換,通過(guò)選擇相應(yīng)的參考橢球運(yùn)用相應(yīng)的轉(zhuǎn)換模型進(jìn)行轉(zhuǎn)換。坐標(biāo)轉(zhuǎn)換數(shù)據(jù)處理過(guò)程復(fù)雜,模型參數(shù)計(jì)算涉及最小二乘原理和矩陣運(yùn)算,所以利用計(jì)算機(jī)進(jìn)行坐標(biāo)轉(zhuǎn)換,既節(jié)省了時(shí)間,又能提高計(jì)算結(jié)果的準(zhǔn)確性。本文就基于MATLAB平臺(tái)編寫(xiě)坐標(biāo)轉(zhuǎn)換程序以及設(shè)計(jì)坐標(biāo)轉(zhuǎn)換系統(tǒng)用戶(hù)界面,利用MATLAB強(qiáng)大的矩陣運(yùn)算能力以及豐富的函數(shù),能夠方便快捷的實(shí)現(xiàn)坐標(biāo)轉(zhuǎn)換。關(guān)鍵詞:坐標(biāo)系,坐標(biāo)轉(zhuǎn)換,參數(shù)模型,MATLAB文檔大全實(shí)用標(biāo)準(zhǔn)AbstractWiththerapidde
3、velopmentofthecauseofthesurveyingandmapping,theformationofglobalintegration,ofsurveyingandmappingmaterialformaunifiedandstandardrequirement,coordinatesystemofunifiedisoneofthehand.NowcountriesadoptofcoordinatesystemhasBeijing54coordinatesystem,xian80coordi
4、natesystem,WGS84coordinatesystem,thenational2000coordinatesystem,andthelocalcoordinatesystem,theychoosedifferentframeofreferenceellipsoid,throughthedifferentcoordinateconversionbetweentomeetdifferentdemandofengineeringmeasurement.Inthesamecoordinatesystema
5、ndthecoordinatesofdifferentmeans,suchastheearthcoordinate,spacerectangular,planecoordinates.Thetransformationbetweendifferentcoordinatesystem,thesamecoordinateconversionbetweendifferentcoordinates,willusetheircorrespondingtransformationmodelforconversion.T
6、heinteractionbetweenthedifferentcoordinatesystemtransformation,thispapermainlyadoptsthreemodel,thatis,threeparametersmodel,fourparametermodelandsevenparametermodel.Thesamecoordinatecoordinatetransformation,throughtheselectionofthecorrespondingreferencebyth
7、etransformationmodelofthecorrespondingellipsoidforconversion.Coordinateconversionofdataprocessingcomplex,modelparametercalculationinvolvedinleastsquareprincipleandmatrixcomputation,sousecomputercoordinatetransformation,bothtosavetime,andcanimprovetheaccura
8、cyofthecalculationresults.ThispaperbasedonMATLABplatformofcoordinatetransformationandwriteprogramdesigncoordinatetransformationsystemuserinterface,useofMATLABstrongmatrixoperationabilityandrichfunction,canfac