Question

我正在使用JXmapkit，以便在一个框架中显示一个包含openstreetmaps路径点的地图，其中航点的坐标存储在数据库中。单击某个位置时，应用程序将检查该区域的坐标是否在航点附近的区域内，如果为真，则内部框架将打开。问题是点击位置的坐标总是返回不正确的例子，正确的坐标（35.9097,14.4259）返回为（85.05012，-179.96198）。我试图添加差异，但它不起作用，因为我不能确定坐标之间的确切差异，因为每次我点击相同的位置，坐标总是不同。我错过了什么或者我做错了什么？

public static  ArrayList<StopBS> GetBusStopByCoordinates(float x, float y, float radius)
{
    Connection connection = null;
    Statement statement = null;
    ResultSet resultSet = null;
    try
    {
        ArrayList<StopBS> stops = new ArrayList<StopBS>();
        Class.forName("org.sqlite.JDBC");
        connection = DriverManager.getConnection(ConnectionString);
        statement = connection.createStatement(); 
       // Added value
       // x -= 49.1401725;
       // y += 194.4150295;
        float x1 = x - radius;
        float x2 = x + radius;
        float y1 = y - radius;
        float y2 = y + radius;
        String command = "SELECT StopID, StopNumber, Tag, Latitude, Longitude FROM StopTable  WHERE (Latitude BETWEEN %f AND %f) AND (Longitude BETWEEN %f AND %f)" ;
        command = String.format(command, x1,x2,y1,y2);
        resultSet = statement.executeQuery(command);
        while (resultSet.next())
        {
            StopBS newStop = new StopBS();
            newStop.StopID = resultSet.getInt("StopID");
            newStop.StopNumber = resultSet.getInt("StopNumber");
            newStop.Tag = resultSet.getString("Tag");
            newStop.Lat = resultSet.getFloat("Latitude");
            newStop.Long = resultSet.getFloat("Longitude");
            stops.add(newStop);
        }
        return stops;
    }
    catch (Exception e)
    {
        e.printStackTrace();
        return null;
    }
    finally
    {
        try
        {
            resultSet.close();
            statement.close();
            connection.close();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}
mainMap.getMainMap().addMouseListener(new MouseInputAdapter()
{      
        public void mouseClicked(MouseEvent e)
        {
           //Get mouse click position in screen values
            Point point = e.getPoint();
            //get map component
            JXMapViewer map = mainMap.getMainMap();
            //calculate x, y for map as the point is relative to the whole screen
           Rectangle bounds = getBounds();
            int x = (int)(point.getX() - bounds.getX());
            int y = (int)(point.getY() - bounds.getY());

            //Get the lat and long from the x and y mouse position
            Point2D pixelcoord1 = point;

           GeoPosition mappos =   map.getTileFactory().pixelToGeo(pixelcoord1, map.getZoom());
            Point2D QALLA =  map.getTileFactory().geoToPixel(mappos, map.getZoom());

           //check in database for busstops in that area 0.0015F
          ArrayList<StopBS> stops =  DataAccess.GetBusStopByCoordinates((float)mappos.getLatitude(),(float)mappos.getLongitude(), 0.0015F);
        }
    });
}

Answer 1

jXMapKit1.getMainMap（）。convertPointToGeoPosition（pixelcoord1）

jxmapkit单击事件返回错误的lat long

1 个答案: