坐标度分秒转小数.js

function ConvertToD(rawData) {
    var du = "0";
    if (rawData.indexOf("°") != -1) {
        du = rawData.substring(0, rawData.indexOf("°"));
    }
    var fen = "0";
    if (rawData.indexOf("′") != -1) {
        var fen = rawData.substring(rawData.indexOf("°") + 1, rawData.indexOf("′"));
    }
    var miao = "0";
    if (rawData.indexOf("″") != -1) {
      var ii = rawData.indexOf("′")
      if (ii != -1) {
        ii += 1
      } else {
        ii =rawData.indexOf("°") + 1
      }
      var miao = rawData.substring(ii, rawData.indexOf("″"));
    }
    var tempfen = parseFloat(fen) + parseFloat(miao / 60);
    var tempdu = parseFloat(tempfen / 60) + parseFloat(du);

    if (rawData.toLowerCase().indexOf('w') != -1 || rawData.toLowerCase().indexOf('s') != -1) {
      tempdu *= -1
    }
    return tempdu
}