// use base CanGetDD

        public override bool CanGetDDM(int srFactoryCode, out string coord)
        {
            coord = string.Empty;
            if(base.CanGetDDM(srFactoryCode, out coord))
            {
                return true;
            }
            else
            {
                if(base.CanGetDD(srFactoryCode, out coord))
                {
                    // convert dd to ddm
                    CoordinateDD dd;
                    if(CoordinateDD.TryParse(coord, out dd))
                    {
                        var ddm = new CoordinateDDM(dd);
                        coord = ddm.ToString("", new CoordinateDDMFormatter());
                        return true;
                    }
                }
            }
            return false;
        }
        public void FormatterDDM()
        {
            var coord = new CoordinateDDM(40, 16.38288, -78, 50.84562);
            var temp = coord.ToString("", new CoordinateDDMFormatter());
            Assert.AreEqual(temp, "40°16.38288' -78°50.84562'");

            temp = coord.ToString("A0°B0.0#####'N X0°Y0.0#####'E", new CoordinateDDMFormatter());
            Assert.AreEqual(temp, "40°16.38288'N 78°50.84562'W");

            temp = coord.ToString("A+-0°B0.0#####' X+-0°Y0.0#####'", new CoordinateDDMFormatter());
            Assert.AreEqual(temp, "+40°16.38288' -78°50.84562'");

            temp = coord.ToString("NA0°B0.0#####' EX0°Y0.0#####'", new CoordinateDDMFormatter());
            Assert.AreEqual(temp, "N40°16.38288' W78°50.84562'");
            
            temp = coord.ToString("A0°B0.0#####'N, X0°Y0.0#####'E", new CoordinateDDMFormatter());
            Assert.AreEqual(temp, "40°16.38288'N, 78°50.84562'W");
            
            temp = coord.ToString("A0° B0.0#####'N X0° Y0.0#####'E", new CoordinateDDMFormatter());
            Assert.AreEqual(temp, "40° 16.38288'N 78° 50.84562'W");
        }
        private void UpdateSample()
        {
            var type = GetCoordinateType();

            switch(type)
            {
                case CoordinateType.DD:
                    var dd = new CoordinateDD();

                    if (ctdict.ContainsKey(CoordinateType.DD))
                    {
                        CoordinateDD.TryParse(ctdict[type], out dd);
                    }

                    Sample = dd.ToString(Format, new CoordinateDDFormatter());

                    break;
                case CoordinateType.DDM:
                    var ddm = new CoordinateDDM();
                    
                    if(ctdict.ContainsKey(type))
                    {
                        CoordinateDDM.TryParse(ctdict[type], out ddm);
                    }

                    Sample = ddm.ToString(Format, new CoordinateDDMFormatter());
                    break;
                case CoordinateType.DMS:
                    var dms = new CoordinateDMS();

                    if(ctdict.ContainsKey(type))
                    {
                        CoordinateDMS.TryParse(ctdict[type], out dms);
                    }
                    Sample = dms.ToString(Format, new CoordinateDMSFormatter());
                    break;
                case CoordinateType.GARS:
                    var gars = new CoordinateGARS();

                    if(ctdict.ContainsKey(type))
                    {
                        CoordinateGARS.TryParse(ctdict[type], out gars);
                    }

                    Sample = gars.ToString(Format, new CoordinateGARSFormatter());
                    break;
                case CoordinateType.MGRS:
                    var mgrs = new CoordinateMGRS();

                    if(ctdict.ContainsKey(type))
                    {
                        CoordinateMGRS.TryParse(ctdict[type], out mgrs);
                    }

                    Sample = mgrs.ToString(Format, new CoordinateMGRSFormatter());
                    break;
                case CoordinateType.USNG:
                    var usng = new CoordinateUSNG();

                    if(ctdict.ContainsKey(type))
                    {
                        CoordinateUSNG.TryParse(ctdict[type], out usng);
                    }

                    Sample = usng.ToString(Format, new CoordinateMGRSFormatter());
                    break;
                case CoordinateType.UTM:
                    var utm = new CoordinateUTM();

                    if(ctdict.ContainsKey(type))
                    {
                        CoordinateUTM.TryParse(ctdict[type], out utm);
                    }

                    Sample = utm.ToString(Format, new CoordinateUTMFormatter());
                    break;
                default:
                    break;
            }

            RaisePropertyChanged(() => Sample);
        }