[2] .[M].:,1996[3] .[J].,2009(6):26-27[4] ,.[M].:,2001[5] ,.[J].:,1990[6] ,,.[M].:,1989[7] .[J].,2009,29(3):128-130[8] .[J].,2009,35(5):8-9:2010-05-27:(1986—),,2008,。:1672-7479(2010)04-0008-03WGS-84蒋小军 宋占峰 吴清华(, 410004)ConversionMethodbetweenLocalIndependentCoordinateSystemandWGS-84CoordinateSystemasWellasItsApplicationsJiangXiaojun SongZhanfeng WuQinghua 根据n(n≥3)个点的地方独立坐标及对应的WGS-84坐标,结合平面坐标转换模型、布尔莎模型和三维坐标差转换模型,完成了地方独立坐标系与WGS-84坐标系转换参数的计算。基于该转换模型,利用GoogleEarthCOMAPI、LibKML等开发接口,完成了AutoCAD数字地形图数据到GoogleEarth上的三维表示。 地方独立坐标系 WGS-84坐标系 坐标转换 GoogleEarth:U412.3 :A1 、,,。,,,,,、。:①,;②,,;③,、。,、GIS、,,GoogleEarth,。GoogleEarth。,,、、。,。GoogleEarth,WGS-84,54,54,54WGS-84,,。2 (1)WGS-848 20104a=(6378137±2)m;()GM=(3986005×108±0.6×108)m3/s2; C2.0=-484.16685×10±0.6×10-6;ω=(7292115×10-11±0.15×10-11)rad/s;WGS-84f=1/298.257223563。(2)54()a=6378245m;f=1/298.3;,、54,Δa,1。1 54 3 2。3.1 同一参考系下的平面坐标转换模型XS=ΔX+k×(XTcosα-YTsinα)YS=ΔY+k×(XTsinα+YTcosα)(1) ΔX、ΔY———xy;k、α———。3.2 布尔莎(Bursa)模型xyzS=ΔxΔyΔz+(1+k)xyzT+0rz-ry-rz0rxry-rx0xyzT(2),Δx,Δy,Δz,k,rx,ry,rz。(32,C++15~16),2 WGS-84 ,,。3.3 三维坐标差转换模型,n(n≥3),i(0i≤n,i≠j)(xi,yi,zi),j(0j≤n,j≠i)(xj,yj,zj),Δxij=xj-xi,Δyij=yj-yi,Δzij=zj-zi,ΔxijΔyijΔzijS=(1+k)ΔxijΔyijΔzijT+0rz-ry-rz0rxry-rx0ΔxijΔyijΔzijTΔxijΔyijΔzijS-ΔxijΔyijΔzijT=Δxij0-ΔzijΔyijΔyijΔzij0-ΔxijΔzij-ΔyijΔxij0Tkrxryrz(3) b=Ax9WGS-84: ,,Gauss-Jordan、。,:①,,,,。②,。,。,x。,,。。,Gauss-Jordan、。,。,,。:,。4 。,,112°50′00.0000″E。1。1 WorldGeodeticSystem1984X/mY/mZ()/m(B)(L)(H)769393985.159050581.050072.227028°09′04.6877″112°59′45.3821″64.5884JT0293864.182049763.000081.037228°09′00.5381″112°59′15.4378″73.3985TK0194799.524049909.745985.570528°09′30.9607″112°59′20.5316″77.9322TK0294750.957449614.1457108.458928°09′29.3034″112°59′09.7120″100.8205TK0395368.305349366.258373.496428°09′49.2898″112°59′00.4378″65.8583TK0495406.716249422.603673.839128°09′50.5528″112°59′02.4913″66.20104.1 四参数计算54x:Δx=3021287.8529my:Δy=465391.0823m:k=1.0×10-6:α=-1975.2243″GPS,。4.2 七参数计算54,,54,(2)。2 ΔxΔyΔzkrxryrzWGS-84※54-3424061.78188904563.30314615438.4672-1.66125472912°11′54.0913″-35°11′42.7900″-21°30′28.6601″54※WGS-84-3928813.43218582189.42014824084.8990-1.661561748-14°09′36.9082″33°58′04.8015″22°22′38.6847″4.3 实验结果,AutoCAD,GoogleEarth,GoogleEarth,GoogleEarth,(3)。,GoogleEarth(4)。5 WGS-84,:①,,。,54,。②,,,,。(下转第13页)10 20104。,,,(2)。2 5 ,CPⅠCPⅡ10mm/km25mm/km,,,,,。、、CPI。[1] ,,.[M].:,2005[2] ,.[M].:,1997[3] .(TB10601—2009)[S].:,2010[4] .(TB10101—2009)[S].:,2010[5] .[M].:,2008[6] ,.MicroStationV8[M].:,2002[7] .[M].:,1999[8] .(GB50026—2007)[S].:,20084 GoogleEarth (上接第10页)3 AutoCAD [1] .[J].,2004(3):16-17[2] ,,,.WGS-84BJ-54[J].,2007,30(5):33-42[3] ,.[J].,2007,27(3):25-38[4] ,,,.BURSABJ54WGS84[J].,2006,18(3):32-35[5] ,.GPS[M].:,2005[6] ,.GPS[M].:,2005[7] ,,.[M].:,2001[8] (),.,.C++[M].:,200513: