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1、武漢大學(xué)本科畢業(yè)設(shè)計(jì)(論文)摘要論文系統(tǒng)介紹了各種坐標(biāo)系統(tǒng)及坐標(biāo)轉(zhuǎn)換模型,在綜合分析各模型的基礎(chǔ)上,全面的闡述各模型間的內(nèi)在聯(lián)系,各自的特點(diǎn)和適用范圍。這對(duì)于實(shí)際生產(chǎn)中正確的應(yīng)用局部坐標(biāo)系和地心坐標(biāo)系的轉(zhuǎn)換、各局部坐標(biāo)系間的轉(zhuǎn)換具有較強(qiáng)的指導(dǎo)意義。論文針對(duì)GPS測(cè)量坐標(biāo)轉(zhuǎn)換方法中存在的問(wèn)題,分析了強(qiáng)制符合平面四參數(shù)法和多項(xiàng)式擬合法,這兩種方法能夠有效的克服高程系統(tǒng)以及橢球參數(shù)不一致所造成的誤差,比較適合于工程自由坐標(biāo)之間的轉(zhuǎn)換;論文介紹了莫洛金斯基坐標(biāo)轉(zhuǎn)換法與顧及協(xié)方差陣的三維非線性基準(zhǔn)轉(zhuǎn)換。在遙感應(yīng)用中,要將遙感影像的空間信息轉(zhuǎn)換到其他坐標(biāo)系中,一般通過(guò)幾何校正來(lái)實(shí)現(xiàn),這種方
2、法工作量大而且不可避免會(huì)引入新的誤差。論文從坐標(biāo)轉(zhuǎn)換的角度出發(fā),通過(guò)事先計(jì)算兩個(gè)坐標(biāo)系之間的轉(zhuǎn)換參數(shù),結(jié)合遙感影像中儲(chǔ)存空間信息的方式,推導(dǎo)出遙感圖像坐標(biāo)轉(zhuǎn)換的計(jì)算公式,并由此推導(dǎo)出根據(jù)坐標(biāo)轉(zhuǎn)換參數(shù)計(jì)算重采樣像元坐標(biāo)變換函數(shù)。根據(jù)論文中方法,可以很方便地實(shí)現(xiàn)遙感圖像的坐標(biāo)轉(zhuǎn)換,將遙感圖像的空間信息轉(zhuǎn)換到不同坐標(biāo)系下。關(guān)鍵詞:坐標(biāo)轉(zhuǎn)換遙感影像GPS模型44武漢大學(xué)本科畢業(yè)設(shè)計(jì)(論文)AbstractThispapergivesallkindsofcoordinatetransformationmodels.Aftersynthesized-analysisofallthemode
3、ls,thispaperexpoundstheinherentaffiliations,characteristicsandapplicablescopesatthefirsttime.Thistopicwillhaveastrongerguidancefunctioninpracticaltransformationfromlocalgeodeticcoordinatesystemtogeocentricgeodeticcoordinatesystemandfromlocalgeodeticcoordinatesystemtolocal.Inordertoresolvethe
4、problemofthecoordinatestransformationbetweentheWGS-84andlocalgeodeticsystem,four-parametermethodwithplaneconstraintandthemethodbasedonpolynomialapproximationarediscussed.Theseapproachescangetridoferrorscomefromheightsystemunconformityandellipsoidparameterdifferenceineffect,andaresuitedfortra
5、nsformationbetweenWGS-84coordinatesorlocalcoordinatesandprojectfreedomcoordinates.MeanwhileMolodenskymethodandweightednon-linear3-Dimensionaldatumtransformationalgorithmisgiveninthepaper.Spatialinformationofremotesensingimagesneedstobetransformedtoothercoordinatessystemsinremotesensingapplic
6、ations,whichiscommonlyaccomplishedbygeometriccorrection.Itneedshardworkandwillbringnewerrortoremotesensingimages.Basedonthecoordinatetransformation,thetransformationparametersbetweentwocoordinatesystemsarecalculatedinadvance.Thencoordinatetransformationformulaaswellasfunctionofremotesensingi
7、magesisdeducedonthebasisofthewaybywhichspatialinformationisstoredinremotesensingimages.Asaresult,coordinatescanbeeasilytransformedandspatialinformationofremotesensingimagescanbe44武漢大學(xué)本科畢業(yè)設(shè)計(jì)(論文)transformedtodifferentcoordinatesystemswiththismethod.K