资源描述：
《坐标转换的相关问题_已翻译（_ related problems of coordinate transformation has been translated）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、坐标转换的相关问题_已翻译（_relatedproblemsofcoordinatetransformationhasbeentranslated）[conversion]coordinatetransformationrelatedissues(ellipsoid,projection,coordinatesystem,transformation,BEIJING54,XIAN80,etc.)(Reprint)ReprintedfromthebeammeaningreprintedinDecember29,200912:10reading(7)commen
2、ts(0)Classification:knowledgebasereportingTherelatedproblemsofcoordinatetransformation(ellipsoid,projection,coordinatesystem,transformation,BEIJING54,XIAN80,etc.)2008-12-3116:08Thedifferencebetweengeographicalcoordinatesystemandprojectioncoordinatesystem(citefrom:http://tieba.baidu
3、.com/f?Kz=354009166)1,firstunderstandGeographiccoordinatesystem(geographiccoordinatesystem),Geographiccoordinatesystemliterallytranslatedasgeographiccoordinatesystem,islatitudeandlongitudeasthemapofthestorageunit.ItisobviousthatGeographiccoordinatesystemisasphericalcoordinatesystem
4、.Wewanttostoredigitalinformationontheearthtothesphericalcoordinatesystem.Howdoweoperateit?Theearthisanirregularellipsoid.Howtostorethedatainformationontheellipsoidinascientificway?Thisinevitablyrequiresustofindsuchanellipsoid.Suchellipsoidshavecharacteristics:theycanbequantified.Ha
5、vingalonghalfaxis,shortEccentricityofhalfshaft.ThefollowinglinesaretheKrasovsky_1940ellipsoidanditscorrespondingparameters.Spheroid:Krasovsky_1940SemimajorAxis:6378245.000000000000000000SemiminorAxis:6356863.018773047300000000InverseFlattening(of):298.300000000000010000However,afte
6、rthisellipsoidisnotenough,ageodeticdatumplaneisneededtolocatetheellipsoid.Inthecoordinatesystemdescription,youcanseethereissuchaline:Datum:D_Beijing_1954ThegeodeticdatumisD_Beijing_1954.WiththetwobasicconditionsofSpheroidandDatum,thegeographiccoordinatesystemcanbeused.Completeparam
7、eter:Alias:Abbreviation:Remarks:AngularUnit:Degree(0.017453292519943299)PrimeMeridian(startinglongitude):Greenwich(0.000000000000000000)Datum(geodeticdatum):D_Beijing_1954Spheroid(referenceellipsoid):Krasovsky_1940SemimajorAxis:6378245.000000000000000000SemiminorAxis:6356863.018773
8、047300000000InverseFlatten
