Hi guys, with the new Geolocation's fields I had the need of create an apex class for converting decimal values to degree strings, like SFDC do with the coordinates.

I want to share the class with the community:

public class GeolocationDecimalToDegreesConverter{
    public static String convert(Decimal latitude, Decimal longitude){
        return convertLatitud(latitude) + ' ' + convertLongitude(longitude);
    }

    public static String convertLatitud(Decimal latitude){
        String result = '';
        if(latitude != null){
            String direction = 'N';
            if(latitude < 0){
                direction = 'S';
            }
            result = convert(latitude) + direction;
        }
        return result;
    }

    public static String convertLongitude(Decimal longitude){
        String result = '';
        if(longitude != null){
            String direction = 'E';
            if(longitude < 0){
                direction = 'W';
            }
            result = convert(longitude) + direction;
        }
        return result;
    }
        
    private static String convert(Decimal d){
        d = d.abs();

        //degrees
        Integer i = d.intValue();
        String s = String.valueOf(i) + '°';
        
        //minutes
        d = d - i;
        d = d * 60;
        i = d.intValue();
        s = s + String.valueOf(i) + '\'';
        
        //seconds
        d = d - i;
        d = d * 60;
        i = d.round().intValue();
        s = s + String.valueOf(i) + '"';
        
        return s;
    }
}

 Test:

@IsTest
public class TestGeolocationDecimalToDegreesConverter{
    private static testmethod void test(){
        Decimal latitude = -38.0168573067988;
        Decimal longitude = -57.5689172744751;
        
        String result = GeolocationDecimalToDegreesConverter.convert(latitude, longitude);
        System.AssertEquals('38°1\'1"S 57°34\'8"W', result);
    }
}

 Hope it'll be helpful, regards!

Juan Martín.

PD: The latitude and longitude used in test is from my actual home, please do not drop a bomb there :P