public string GetOneTrajectory(int userID, int index)
{
GPSTrajectory gt = myUserTrajectories.GetTrajectoriesByUserID(userID)[index];
string result = gt.ToJSON();
//添加速度
StringBuilder sb = new StringBuilder();
sb.Append("\"Velocity\":[0,");
for (int i = 1; i < gt.GPSCount; i++)
{
sb.Append(gt[i].Velocity * 3.6);
if (i != gt.GPSCount - 1)
{
sb.Append(',');
}
}
sb.Append(']');
return(JSONConverter.AddElementsToJSON(result, sb.ToString()));
}