/// <summary>
/// Takes a 6-character string gridsquare and processes it using LookupTablesHelper and GridsquareHelper to return a DDMCoordinate object.
/// If solution cannot be found a null DDMCoordinate type is returned.
/// </summary>
/// <param name="gridsquare"></param>
/// <returns></returns>
public DDMCoordinate ConvertGridsquareToDDM(string gridsquare)
{
DDMCoordinate DdmResult = null;
if (!string.IsNullOrEmpty(gridsquare) && !string.IsNullOrWhiteSpace(gridsquare))
{
if (LookuptablesHelper.GenerateTableLookups() && GridsquareHelper.ValidateGridsquareInput(gridsquare, out string validGridsquare))
{
decimal tempLatDegrees = ConversionHelper.GetLatDegrees(LookuptablesHelper, validGridsquare, out short latDirection);
decimal latDegreesWithRemainder = ConversionHelper.AddLatDegreesRemainder(tempLatDegrees, latDirection, validGridsquare);
decimal DDMlatMinutes = ConversionHelper.GetLatMinutes(
LookuptablesHelper, latDegreesWithRemainder, latDirection, validGridsquare, out decimal adjustedLatDegrees);
decimal tempLonDegrees = ConversionHelper.GetLonDegrees(LookuptablesHelper, validGridsquare, out short lonDirection);
decimal lonDegreesWithRemainder = ConversionHelper.AddLonDegreesRemainder(tempLonDegrees, lonDirection, validGridsquare);
decimal DDMlonMinutes = ConversionHelper.GetLonMinutes(
LookuptablesHelper, lonDegreesWithRemainder, lonDirection, validGridsquare, out decimal adjustedLonDegrees);
DdmResult = new DDMCoordinate(
adjustedLatDegrees, DDMlatMinutes,
adjustedLonDegrees, DDMlonMinutes);
}
}
return(DdmResult);
}
/// <summary>
/// Takes a DDMCoordinate objects and processes it using ConversionHelper an GridSquareHelper to return a Gridsquare string.
/// If solution cannot be found a string with encoded error condition is returned and should be handled by the caller.
/// </summary>
/// <param name="ddmCoordinates"></param>
/// <returns></returns>
public string ConvertDDMtoGridsquare(DDMCoordinate ddmCoordinates)
{
if (ddmCoordinates == null)
{
return("BadInp");
}
if (false == LookuptablesHelper.GenerateTableLookups())
{
return("NoTbls");
}
var GridsquareResult = new StringBuilder();
decimal DDMlatDegrees = ddmCoordinates.GetShortDegreesLat();
decimal DDMlonDegrees = ddmCoordinates.GetShortDegreesLon();
decimal DDMlatMinutes = ddmCoordinates.MinutesLattitude;
decimal DDMlonMinutes = ddmCoordinates.MinutesLongitude;
short LatDirection = ConversionHelper.ExtractPolarityNS(ddmCoordinates.ToString());
short LonDirection = ConversionHelper.ExtractPolarityEW(ddmCoordinates.ToString());
GridsquareResult.Append(GridsquareHelper.GetFirstGridsquareCharacter(DDMlonDegrees, LonDirection, out decimal remainderLon));
GridsquareResult.Append(GridsquareHelper.GetSecondGridsquareCharacter(DDMlatDegrees, LatDirection, out decimal remainderLat));
GridsquareResult.Append(GridSquareHelper.GetThirdGridsquareCharacter(remainderLon, LonDirection, out decimal minsRemainderLon));
GridsquareResult.Append(GridSquareHelper.GetFourthGridsquareCharacter(remainderLat, LatDirection));
decimal ddmLonMinsWithRemainder = LonDirection * (minsRemainderLon + DDMlonMinutes);
decimal nearestEvenMultipleLon = ConversionHelper.GetNearestEvenMultiple(ddmLonMinsWithRemainder, 2);
GridsquareResult.Append(GridsquareHelper.GetFifthGridsquareCharacter(LonDirection, nearestEvenMultipleLon));
decimal ddmLatMinsWithRemainder = LatDirection * DDMlatMinutes;
decimal nearestEvenMultipleLat = ConversionHelper.GetNearestEvenMultiple(ddmLatMinsWithRemainder, 1);
GridsquareResult.Append(GridsquareHelper.GetSixthGridsquareCharacter(LatDirection, nearestEvenMultipleLat));
if (GridsquareResult.Length != 6)
{
return("NoCalc");
}
return(GridsquareResult.ToString());
}
