js坐标转换WGS84（大地坐标系BLH）转空间直角坐标系XYZ

红太狼 2021-10-29 11:54 1350阅读 0赞

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// 坐标转换 WGS84经纬度 => 大地坐标系BLH XYZ var pi_180 = Math.PI / 180; var _180_pi = 180 / Math.PI; var projectionTypes = {}; projectionTypes.bj54 = { a:6378245,//长半轴 e2:0.006693421622966//第一偏心率平方 }; projectionTypes.wgs84 = { a:6378135,//长半轴 e2:0.00669437999013//第一偏心率平方 }; var myparams = { dx : 31.4, dy : -144.3, dz : -74.8, rx : 0, ry : 0, rz : 0.814, m : -0.38 }; function _BLH2XYZ(blhObj){//将大地坐标喜欢换为空间直角坐标系 // var e2 = projectionTypes[projectionType].e2;//第一偏心率平方值 var e2 = 0.00669437999013; // var a = projectionTypes[projectionType].a;//长半轴 var a=6378135;//长半轴 var N = a / Math.sqrt(1 - e2 * Math.sin(blhObj.b * pi_180) * Math.sin(blhObj.b * pi_180)); var X = (N + blhObj.h) * Math.cos(blhObj.b * pi_180) * Math.cos(blhObj.l * pi_180); var Y = (N + blhObj.h) * Math.cos(blhObj.b * pi_180) * Math.sin(blhObj.l * pi_180); var Z = [N * (1 - e2 ) + blhObj.h] * Math.sin(blhObj.b * pi_180); var resultObj = {}; resultObj.X = X; resultObj.Y = Y; resultObj.Z = Z; return resultObj; } var polygonPoints = [ [118.22166324000011,33.94018013200008], [118.22166694800001,33.940138392000051], [118.22167282000009,33.940096924000045], [118.22168107000005,33.940055637000057], [118.22170407500005,33.939955487000077], [118.2217123260001,33.939914291000036], [118.22171830600007,33.93987282300003], [118.22172190500009,33.939831083000058], [118.22175552400006,33.939267271000062], [118.22175661300003,33.939258077000034], [118.22544694300007,33.939262686000063], [118.22536301900004,33.940659324000023], [118.2216439660001,33.940503869000054], [118.22166324000011,33.94018013200008] ]; var newPolygonsArray = []; var arrlen = polygonPoints.length; console.log(111,arrlen) for(var i = 0;i<arrlen;i++){ // console.log(polygonPoints[i]) var temp = polygonPoints[i].push(0); var blhobj = {b:polygonPoints[i][0],l:polygonPoints[i][1],h:polygonPoints[i][2]}; var xyz = _BLH2XYZ(blhobj); var litarr = [xyz.X,xyz.Y]; newPolygonsArray.push(litarr); } console.log("WWWWWWWWW",newPolygonsArray) for(let i=0;i<newPolygonsArray.length;i++){ console.log(newPolygonsArray[i]) } // 结果 // [-2508762.3877196563, -1688373.3218629] // [-2508763.9197682994, -1688371.6975169708] // [-2508765.620088954, -1688370.2037195012] // [-2508767.508796714, -1688368.8482179488] // [-2508772.3340561124, -1688365.7242519162] // [-2508774.2201614925, -1688364.3727831203] // [-2508775.929276027, -1688362.8848971743] // [-2508777.4524383997, -1688361.2545638504] // [-2508796.8051914386, -1688338.4102690013] // [-2508797.1648267615, -1688338.0673958578] // [-2509097.6557210106, -1688540.581141801] // [-2509049.6587237557, -1688597.1412485857] // [-2508751.277772253, -1688386.4403409816] // [-2508762.3877196563, -1688373.3218629]

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转载于:https://www.cnblogs.com/marvelousone/p/11265880.html