/// <summary>
/// Takes an initialized LookupTablesHelper instance and a valid Gridsquare and returns a signed Longitude per the table lookup.
/// LonDirection: If positive, then returned decimal is positive (North); if negative, then returned decimal is negative (South).
/// </summary>
/// <param name="lookupTablesHelper"></param>
/// <param name="Gridsquare"></param>
/// <param name="LonDirection"></param>
/// <returns></returns>
public static decimal GetLonDegrees(LookupTablesHelper lookupTablesHelper, string Gridsquare, out short LonDirection)
{
LonDirection = 0;
if (lookupTablesHelper == null || string.IsNullOrEmpty(Gridsquare) || string.IsNullOrWhiteSpace(Gridsquare))
{
return(0m);
}
if (lookupTablesHelper.GetTable1G2CLookup.TryGetValue(Gridsquare[0].ToString(currentCulture).ToUpper(currentCulture), out int lonDegreesLookupResult))
{
if (Gridsquare[0].ToString(currentCulture).ToUpper(currentCulture) == "I" || lonDegreesLookupResult < 0)
{
LonDirection = -1;
}
else if (Gridsquare[0].ToString(currentCulture).ToUpper(currentCulture) == "J" || lonDegreesLookupResult >= 0)
{
LonDirection = 1;
}
else
{
return(0m);
}
}
else
{
return(0m);
}
return(Math.Abs(lonDegreesLookupResult) * LonDirection);
}
/// <summary>
/// Takes an initialized LookupTablesHelper instance and a valid Gridsquare and returns a signed Lattitude per the table lookup.
/// LatDirection: If positive, then returned decimal is positive (North); if negative, then returned decimal is negative (South).
/// </summary>
/// <param name="lookupTablesHelper"></param>
/// <param name="Gridsquare"></param>
/// <param name="LatDirection"></param>
/// <returns></returns>
public static decimal GetLatDegrees(LookupTablesHelper lookupTablesHelper, string Gridsquare, out short LatDirection)
{
LatDirection = 0;
if (lookupTablesHelper == null || string.IsNullOrEmpty(Gridsquare) || string.IsNullOrWhiteSpace(Gridsquare))
{
return(-90m);
}
string currentGridsquare = Gridsquare[1].ToString(currentCulture);
if (lookupTablesHelper.GetTable4G2CLookup.TryGetValue(currentGridsquare.ToUpper(currentCulture), out int latDegreesLookupResult))
{
if (currentGridsquare.ToUpper(currentCulture) == "I" || latDegreesLookupResult < 0)
{
LatDirection = -1;
}
if (currentGridsquare.ToUpper(currentCulture) == "J" || latDegreesLookupResult > 0)
{
LatDirection = 1;
}
}
else
{
LatDirection = 0;
}
return(Math.Abs(latDegreesLookupResult) * LatDirection);
}
/// <summary>
/// Takes gridsquare character 5 and uses LookupTableHelper to find and return minutes Longitude.
/// If greater than one degree Longitude, one degree is removed from minutes and one degree is added to DDMLonDegrees.
/// DDMLonDegrees is rounded to the nearest 2.5 minutes Longitude and output via adjustedLonDegrees, as an UNSIGNED decimal.
/// LonDirection is necessary to ensure correct sign is applied at decimal return.
/// </summary>
/// <param name="lookupTablesHelper"></param>
/// <param name="DDMlonDegrees"></param>
/// <param name="LonDirection"></param>
/// <param name="Gridsquare"></param>
/// <param name="adjustedDDMlonDegrees"></param>
/// <returns></returns>
public static decimal GetLonMinutes(LookupTablesHelper lookupTablesHelper, decimal DDMlonDegrees, int LonDirection, string Gridsquare, out decimal adjustedDDMlonDegrees)
{
adjustedDDMlonDegrees = 0m;
if (lookupTablesHelper == null || string.IsNullOrEmpty(Gridsquare) || string.IsNullOrWhiteSpace(Gridsquare) || LonDirection == 0)
{
return(0.0m);
}
decimal testResult = 0.0m;
if (lookupTablesHelper.GetTable3G2CLookup.TryGetValue(Gridsquare[4].ToString(currentCulture).ToUpper(currentCulture), out decimal lonMinsLookupResult))
{
if (LonDirection > 0)
{
if (lonMinsLookupResult < 0)
{
lonMinsLookupResult += 115;
}
if (lonMinsLookupResult > 60)
{
lonMinsLookupResult -= 60;
adjustedDDMlonDegrees++;
}
testResult = lonMinsLookupResult;
}
if (LonDirection < 0)
{
if (lonMinsLookupResult < -60)
{
lonMinsLookupResult += 60;
adjustedDDMlonDegrees--;
}
testResult = lonMinsLookupResult;
}
adjustedDDMlonDegrees += DDMlonDegrees;
}
else
{
return(0m);
}
return(Math.Abs(testResult) + LonMinsRound);
}
/// <summary>
/// Takes gridsquare character 6 and uses LookupTableHelper to find and return minutes Latitude.
/// If greater than one degree Latgitude, one degree is removed from minutes and one degree is added to DDMLatDegrees.
/// DDMLatDegrees is rounded to the nearest 1.25 minutes Latitude and output via adjustedLatDegrees, as an UNSIGNED decimal.
/// LatDirection is necessary to ensure correct sign is applied at decimal return.
/// </summary>
/// <param name="lookupTablesHelper"></param>
/// <param name="DDMLatDegrees"></param>
/// <param name="LatDirection"></param>
/// <param name="Gridsquare"></param>
/// <param name="adjustedLatDegrees"></param>
/// <returns></returns>
public static decimal GetLatMinutes(LookupTablesHelper lookupTablesHelper, decimal DDMLatDegrees, int LatDirection, string Gridsquare, out decimal adjustedLatDegrees)
{
adjustedLatDegrees = 0.0m;
if (lookupTablesHelper == null || string.IsNullOrEmpty(Gridsquare) || string.IsNullOrWhiteSpace(Gridsquare) || LatDirection == 0)
{
return(0.0m);
}
if (lookupTablesHelper.GetTable6G2CLookup.TryGetValue(Gridsquare[5].ToString(currentCulture).ToUpper(currentCulture), out decimal latMinsLookupResult))
{
if (LatDirection > 0)
{
latMinsLookupResult += 57.5m;
if (latMinsLookupResult > 60)
{
adjustedLatDegrees++;
latMinsLookupResult -= 60;
}
adjustedLatDegrees += DDMLatDegrees;
}
if (LatDirection < 0)
{
if (latMinsLookupResult < -60)
{
adjustedLatDegrees--;
latMinsLookupResult += 60;
}
adjustedLatDegrees -= Math.Abs(DDMLatDegrees);
}
}
else
{
return(0m);
}
return(Math.Abs(latMinsLookupResult) + LatMinsRound);
}
public GridSquareHelper()
{
LookupTablesHelper = new LookupTablesHelper();
LookupTablesHelper.GenerateTableLookups();
}