#include?“coordinate.h“
#include?

/*****************************************************************
【功能說明】坐標轉換將AIS得到的經緯度轉換為本船為中心的級坐標，距離和方位
【參數說明】形參一為指向本船的指針形參二為指向目標船的指針
A為方位角，L為距離
*****************************************************************/
void?coordinate::Distance（ShipAIS?*s?ShipAIS?*a）

{
????float?cosc=cos（（90-a->Lat）*M_PI/180）*cos（（90-s->Lat）*M_PI/180）+
????????????sin（（90-a->Lat）*M_PI/180）*sin（（90-s->Lat）*M_PI/180）*cos（（a->Lon-s->Lon）*M_PI/180）;
????float?sinc=sqrt（1-pow（cosc2））;

????float?A=asin（sin（（90-a->Lat）*M_PI/180）*sin（（a->Lon-s->Lon）*M_PI/180）/sinc）;
?????A=A*180/M_PI;
?????if（a->Lat>=s->Lat）
?????{
????????if（a->Lon>=s->Lon）
?????????{
????????????A=A;
?????????}
?????????else
?????????{
?????????????A=360+A;
?????????}
?????}
?????else
?????{
?????????A=180-A;
?????}

????float?c=acos（cosc）;
????float?L=6378.137*c;

???qDebug（“L=%0.6f“L）;
???qDebug（“A=%0.6f“A）;
????qDebug（）<}

?屬性????????????大小?????日期????時間???名稱
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?????文件????????381??2015-01-22?20:08??02AISandRADAR\02AISandRADAR.pro

?????文件??????13675??2015-01-22?20:08??02AISandRADAR\02AISandRADAR.pro.user

?????文件???????1091??2015-01-22?20:08??02AISandRADAR\coordinate.cpp

?????文件????????212??2015-01-22?20:08??02AISandRADAR\coordinate.h

?????文件????????178??2015-01-22?20:08??02AISandRADAR\main.cpp

?????文件????????555??2015-01-22?20:08??02AISandRADAR\mainwindow.cpp

?????文件????????392??2015-01-22?20:08??02AISandRADAR\mainwindow.h

?????文件???????3276??2015-01-22?20:08??02AISandRADAR\mainwindow.ui

?????文件????????235??2015-01-22?20:08??02AISandRADAR\ShipInformation.h

?????目錄??????????0??2015-01-22?20:08??02AISandRADAR

-----------?---------??----------?-----??----

????????????????19995????????????????????10