Thread: GPS Coordinates Calculator

Hey guys im dealing with a bit of an issue in my code and i would really appreciate some help.So i need to write a code that will read in some coordinates from a txt file and store them in an array (one 2d array or two 1d arrays),and then i need with a help from a function to calculate the maximum distance between all the coordinates that i have read in from the txt file.( exactly 30 pairs). Now i have read in those coordinates and i have made a function that does the math but in order for that function to work i need 4 arguments,and i have only 2. I'll put my code here so maybe some of u guys have an idea what im doing wrong or how i could get the extra 2 arguments i need. Thanks!

public class gps {
public static double calculateDistance(double latitude1, double longitude1,
			double latitude2, double longitude2) {
		double deltaLatitude = Math.toRadians(latitude2 - latitude1);
		double deltaLongitude = Math.toRadians(longitude2 - longitude1);
 
		double a = Math.sin(deltaLatitude / 2) * Math.sin(deltaLatitude / 2)
				+ Math.cos(Math.toRadians(latitude1))
				* Math.cos(Math.toRadians(latitude2)) 
				* Math.sin(deltaLongitude / 2) 
				* Math.sin(deltaLongitude / 2);
 
		double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
 
		return 6371000 * c;
	}	
 
public static void main(String [] args){
In.open("coordinates.txt");
        String [] zeilen = new String [30];
        String line;
        int i = 0;
        while(i < zeilen.length && (line =In.readLine ()) != null){
			zeilen[i] = line;        
            i++;
        }
        double [] x = new double [zeilen.length];
        double [] y = new double [zeilen.length];
        for( i = 0; i<zeilen.length; i++){
            String s = zeilen[i];
            String [] coords = s.split ("\\s+");
            String number1 = coords [0];
            String number2 = coords [1];
 
            x[i] = Double.parseDouble(number1);
            y[i] = Double.parseDouble(number2);
            Out.println(x[i]);
        }
        In.close ();
    }
}

Hey, thanks for the feedback. I just wanna say that i have found the solution to the problem i had and i am gonna post it here. And by arguments i meant acutally Longitude and Latitude (the x and y).

public class gps {
public static double calculateDistance(double latitude1, double longitude1,
			double latitude2, double longitude2) {
		double deltaLatitude = Math.toRadians(latitude2 - latitude1);
		double deltaLongitude = Math.toRadians(longitude2 - longitude1);
 
		double a = Math.sin(deltaLatitude / 2) * Math.sin(deltaLatitude / 2)
				+ Math.cos(Math.toRadians(latitude1))
				* Math.cos(Math.toRadians(latitude2)) 
				* Math.sin(deltaLongitude / 2) 
				* Math.sin(deltaLongitude / 2);
 
		double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
 
		return 6371000 * c;
	}	
static final int size = 30;	
public static void main(String [] args){
In.open ("coordinates.txt");
double [] x = new double[size];
double [] y = new double[size];
for (int i = 0; i< size; i++){
	 x[i] = In.readDouble ();
	 y[i] = In.readDouble ();
}
double maxdistance = 0;
	for(int i = 0; i<size; i++){
		for (int j = 0; j<size; j++){			
		double distance = calculateDistance( x[i], y[i], x[j], y[j]);
			if(maxdistance < distance){
				maxdistance = distance;
		}	    
    }
	}
	Out.formatln("The biggest distance is: %.3f m", maxdistance);
	In.close ();
}}