<title>WGS84台灣經緯度座標轉TWD97二度分帶座標</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <body bgcolor=lightgreen> <script language="JavaScript"> function lonlat2twd97twd67(lon,lat) { var x97,y97; var a,b,long0,k0,dx; var e,e2,n,nu,p; var A,B,C,D,E,S; var K1,K2,K3; var K4,K5; a = 6378137.0; b = 6356752.314245; long0 = 121.0*Math.PI/180.0; k0 = 0.9999; dx = 250000; e = Math.pow(1-(b*b)/(a*a),0.5); e2 = Math.pow(e,2)/(1-Math.pow(e,2)); n = (a-b)/(a+b); nu = a/Math.pow(1-Math.pow(e,2)*Math.pow(Math.sin(lat),2),0.5); p = lon-long0; A = a*(1 - n + (5/4.0)*(Math.pow(n,2) - Math.pow(n,3)) + (81/64.0)*(Math.pow(n,4) - Math.pow(n,5))); B = (3*a*n/2.0)*(1 - n + (7/8.0)*(Math.pow(n,2) - Math.pow(n,3)) + (55/64.0)*(Math.pow(n,4) - Math.pow(n,5))); C = (15*a*Math.pow(n,2)/16.0)*(1 - n + (3/4.0)*(Math.pow(n,2) - Math.pow(n,3))); D = (35*a*Math.pow(n,3)/48.0)*(1 - n + (11/16.0)*(Math.pow(n,2) - Math.pow(n,3))); E = (315*a*Math.pow(n,4)/51.0)*(1 - n); S = A*lat - B*Math.sin(2*lat) + C*Math.sin(4*lat) - D*Math.sin(6*lat) + E*Math.sin(8*lat); K1 = S*k0; K2 = k0*nu*Math.sin(2*lat)/4.0; K3 = (k0*nu*Math.sin(lat)*Math.pow(Math.cos(lat),3)/24.0) * (5.0 - Math.pow(Math.tan(lat),2) + 9.0*e2*Math.pow(Math.cos(lat),2) + 4.0*Math.pow(e2,2)*Math.pow(Math.cos(lat),4)); y97 = K1 + K2*Math.pow(p,2) + K3*Math.pow(p,4); K4 = k0*nu*Math.cos(lat); K5 = (k0*nu*Math.pow(Math.cos(lat),3)/6.0) * (1 - Math.pow(Math.tan(lat),2) + e2*Math.pow(Math.cos(lat),2)); x97 = K4*p + K5*Math.pow(p,3) + dx; document.write("TWD97 (" + x97 +"," + y97 + ")<br>" ); x67=x97-807.8-0.00001549*x97-0.000006521*y97; y67=y97+248.6-0.00001549*y97-0.000006521*x97; document.write("TWD67 (" + x67 +"," + y67 + ")<br>" ); } function change_wgs84() { var lon,lat,londeg,latdeg; var query=document.frm.wgs84.value; var res = query.split(","); document.write("(" +res[0]+"," +res[1]+")<br>"); londeg=parseFloat(res[0]); latdeg=parseFloat(res[1]); lon=londeg*Math.PI/180.0; lat=latdeg*Math.PI/180.0; lonlat2twd97twd67(lon,lat) } </script> <form name='frm' METHOD=POST ACTION='' onsubmit='return validation();'> <div align="center"> 將WGS84經緯度座標轉TWD97,TWD67<br> 台灣虎子山經緯度WGS84=120.982025,23.973875 <br> 其二度分帶座標T<br> TWD97=248170.787,2652129.936 <br> TWD67=247341.925, 2652335.811<br> 輸入要轉換WGS84經緯度座標(lon,lat):<input type=text name=wgs84 size=40 value="120.982025,23.973875" onchange="change_wgs84()"> <br> </form> <br> <script language="JavaScript"> var lon,lat,londeg,latdeg,x,y; londeg=120.982025; latdeg=23.973875; document.write("WGS84台灣經緯度座標: (" + londeg +"," + latdeg + ")<br>" ); lon=londeg*Math.PI/180.0; lat=latdeg*Math.PI/180.0; lonlat2twd97twd67(lon,lat) document.write("本頁最後更新日期:"+document.lastModified+"<br>"); </script> </div> </body> |