private static void Main(string[] args)
{
options = new ZmanimOptions();
p = new OptionSet
{
{"d|date=", "Set date. <mm/dd/yyyy>", x => options.Date = DateTime.ParseExact(x, "MM/dd/yyyy", CultureInfo.InvariantCulture)},
{"lat|latitude=", "Set location's latitude", (double x) => options.Latitude = x},
{"lon|longitude=", "Set location's longitude", (double x) => options.Longitude = x},
{"e|elevation=", "Set location's elevation; Positive only", (double x) => options.Elevation = x},
{"tz|timezone=", "Set location's TimeZone", x => options.TimeZone = x},
{"tf|timeformat=", "Set the way the application formats a DateTime object.", x => options.DateTimeFormat = x},
{"h|?|help", "Shows this help message", v => ShowHelp()}
};
List<string> extraArgs;
try
{
extraArgs = p.Parse(args);
}
catch (OptionException)
{
ShowHelp();
return;
}
var timeZone = new OlsonTimeZone(options.TimeZone);
var location =
new GeoLocation(string.Empty, options.Latitude, options.Longitude, options.Elevation, timeZone);
var czc = new ComplexZmanimCalendar(new DateTime(options.Date.Year, options.Date.Month, options.Date.Day), location);
var methods = GetDateTimeAndLongMethods();
foreach (var first in
extraArgs.Select(extraArg =>
methods.Where(
f => f.Name.Remove(0, 3).ToLowerInvariant() == extraArg.ToLowerInvariant()).First())
)
{
object invoke = first.Invoke(czc, null);
if (extraArgs.Count > 1)
Console.Write(first.Name.Remove(0, 3) + ": ");
if (invoke.GetType() == typeof(DateTime))
{
var time = (DateTime)invoke;
Console.Write(time.ToString(options.DateTimeFormat));
}
else if (invoke.GetType() == typeof(long))
{
Console.WriteLine((long)invoke);
}
if (extraArgs.Count > 1)
Console.WriteLine();
}
//Console.Read();
}
private ComplexZmanimCalendar GetZmanim()
{
string locationName = "Lakewood, NJ";
double latitude = 40.09596; //Lakewood, NJ
double longitude = -74.22213; //Lakewood, NJ
double elevation = 0; //optional elevation
var timeZone = new WindowsTimeZone();
var location = new GeoLocation(locationName, latitude, longitude, elevation, timeZone);
return new ComplexZmanimCalendar(location);
}
public void Can_select_over_linq()
{
var location = new GeoLocation("Lakewood, NJ", 40.09596, -74.22213, 0, new WindowsTimeZone(TimeZoneInfo.Local));
var days = from day in GetDaysInHebrewYear(DateTime.Now, location)
let sunrise = day.GetSunrise()
where sunrise.Value.Hour >= 5 && sunrise.Value.Minute > 45
select sunrise;
var itemCount = days.Count();
}
public IEnumerable<ComplexZmanimCalendar> GetDaysInHebrewMonth(DateTime yearAndMonth, GeoLocation location)
{
Calendar calendar = new HebrewCalendar();
var daysInMonth = calendar.GetDaysInMonth(calendar.GetYear(yearAndMonth), calendar.GetMonth(yearAndMonth));
for (int i = 0; i < daysInMonth; i++)
{
var zmanimCalendar = new ComplexZmanimCalendar(location);
zmanimCalendar.DateWithLocation.Date = new DateTime(yearAndMonth.Year, yearAndMonth.Month, i + 1);
yield return zmanimCalendar;
}
}
public void Check_is_offset_timezone_working()
{
String locationName = "Lakewood, NJ";
double latitude = 40.09596; //Lakewood, NJ
double longitude = -74.22213; //Lakewood, NJ
double elevation = 0; //optional elevation
var timeZone = new OffsetTimeZone(new TimeSpan(0, 0, -14400));
var location = new GeoLocation(locationName, latitude, longitude, elevation, timeZone);
var czc = new ComplexZmanimCalendar(new DateTime(2010, 4, 2), location);
var zman = czc.GetSunrise();
Assert.That(zman, Is.EqualTo(
new DateTime(2010, 4, 2, 6, 39, 41, 832)
));
}
public IEnumerable<ComplexZmanimCalendar> GetDaysInHebrewYear(DateTime year, GeoLocation location)
{
Calendar calendar = new HebrewCalendar();
var currentYear = calendar.GetYear(year);
var amountOfMonths = calendar.GetMonthsInYear(currentYear);
for (int i = 0; i < amountOfMonths; i++)
{
var currentMonth = i + 1;
var daysInMonth = calendar.GetDaysInMonth(currentYear, currentMonth);
for (int dayOfMonth = 0; dayOfMonth < daysInMonth; dayOfMonth++)
{
var zmanimCalendar = new ComplexZmanimCalendar(location);
zmanimCalendar.DateWithLocation.Date = new DateTime(currentYear, currentMonth, dayOfMonth + 1, calendar);
yield return zmanimCalendar;
}
}
}
static void Main(string[] args)
{
string locationName = "Lakewood, NJ";
double latitude = 40.09596; //Lakewood, NJ
double longitude = -74.22213; //Lakewood, NJ
double elevation = 0; //optional elevation
ITimeZone timeZone = new OlsonTimeZone("America/New_York");
GeoLocation location = new GeoLocation(locationName, latitude, longitude, elevation, timeZone);
ComplexZmanimCalendar zc = new ComplexZmanimCalendar(location);
System.Console.WriteLine("Today's Zmanim for " + locationName);
System.Console.WriteLine("Sunrise: " + zc.GetSunrise()); //output sunrise
System.Console.WriteLine("Sof Zman Shema MGA: " + zc.GetSofZmanShmaMGA()); //output Sof Zman Shema MGA
System.Console.WriteLine("Sof Zman Shema GRA: " + zc.GetSofZmanShmaGRA()); //output Sof Zman Shema GRA
System.Console.WriteLine("Sunset: " + zc.GetSunset()); //output sunset
System.Console.WriteLine("Press enter to exit.");
System.Console.ReadLine();
}
public ComplexZmanimCalendar GetCalendar()
{
String locationName = "Lakewood, NJ";
double latitude = 40.09596; //Lakewood, NJ
double longitude = -74.22213; //Lakewood, NJ
double elevation = 0; //optional elevation
ITimeZone timeZone = new OlsonTimeZone("America/New_York");
GeoLocation location = new GeoLocation(locationName, latitude, longitude, elevation, timeZone);
ComplexZmanimCalendar czc = new ComplexZmanimCalendar(new DateTime(2010, 4, 2), location);
/*
string locationName = "Brooklyn, NY";
double latitude = 40.618851; //Brooklyn, NY
double longitude = -73.985921; //Brooklyn, NY
double elevation = 0; //optional elevation
TimeZone timeZone = TimeZone.getTimeZone("America/New_York");
var location = new GeoLocation(locationName, latitude, longitude, elevation, timeZone);
var czc = new ComplexZmanimCalendar(location);
czc.setCalendar(new GregorianCalendar(2010, 3, 2));
*/
return czc;
}
///<summary>
/// Calculate <a href = "http://en.wikipedia.org/wiki/Great-circle_distance">geodesic
/// distance</a> in Meters between this Object and a second Object passed to
/// this method using <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
///<param name = "formula">
/// This formula calculates initial bearing (<seealso cref = "INITIAL_BEARING" />),
/// final bearing (<seealso cref = "FINAL_BEARING" />) and distance (<seealso cref = "DISTANCE" />). </param>
private double VincentyFormula(GeoLocation location, int formula)
{
double a = 6378137;
double b = 6356752.3142;
double f = 1 / 298.257223563; // WGS-84 ellipsiod
double L = MathExtensions.ToRadians(location.Longitude - Longitude);
double U1 = Math.Atan((1 - f) * Math.Tan(MathExtensions.ToRadians(Latitude)));
double U2 = Math.Atan((1 - f) * Math.Tan(MathExtensions.ToRadians(location.Latitude)));
double sinU1 = Math.Sin(U1), cosU1 = Math.Cos(U1);
double sinU2 = Math.Sin(U2), cosU2 = Math.Cos(U2);
double lambda = L;
double lambdaP = 2 * Math.PI;
double iterLimit = 20;
double sinLambda = 0;
double cosLambda = 0;
double sinSigma = 0;
double cosSigma = 0;
double sigma = 0;
double sinAlpha = 0;
double cosSqAlpha = 0;
double cos2SigmaM = 0;
double C;
while (Math.Abs(lambda - lambdaP) > 1e-12 && --iterLimit > 0)
{
sinLambda = Math.Sin(lambda);
cosLambda = Math.Cos(lambda);
sinSigma =
Math.Sqrt((cosU2 * sinLambda) * (cosU2 * sinLambda) +
(cosU1 * sinU2 - sinU1 * cosU2 * cosLambda) * (cosU1 * sinU2 - sinU1 * cosU2 * cosLambda));
if (sinSigma == 0)
{
return(0); // co-incident points
}
cosSigma = sinU1 * sinU2 + cosU1 * cosU2 * cosLambda;
sigma = Math.Atan2(sinSigma, cosSigma);
sinAlpha = cosU1 * cosU2 * sinLambda / sinSigma;
cosSqAlpha = 1 - sinAlpha * sinAlpha;
cos2SigmaM = cosSigma - 2 * sinU1 * sinU2 / cosSqAlpha;
if (double.IsNaN(cos2SigmaM))
{
cos2SigmaM = 0; // equatorial line: cosSqAlpha=0 (§6)
}
C = f / 16 * cosSqAlpha * (4 + f * (4 - 3 * cosSqAlpha));
lambdaP = lambda;
lambda = L +
(1 - C) * f * sinAlpha *
(sigma + C * sinSigma * (cos2SigmaM + C * cosSigma * (-1 + 2 * cos2SigmaM * cos2SigmaM)));
}
if (iterLimit == 0)
{
return(double.NaN); // formula failed to converge
}
double uSq = cosSqAlpha * (a * a - b * b) / (b * b);
double A = 1 + uSq / 16384 * (4096 + uSq * (-768 + uSq * (320 - 175 * uSq)));
double B = uSq / 1024 * (256 + uSq * (-128 + uSq * (74 - 47 * uSq)));
double deltaSigma = B * sinSigma *
(cos2SigmaM +
B / 4 *
(cosSigma * (-1 + 2 * cos2SigmaM * cos2SigmaM) -
B / 6 * cos2SigmaM * (-3 + 4 * sinSigma * sinSigma) * (-3 + 4 * cos2SigmaM * cos2SigmaM)));
double distance = b * A * (sigma - deltaSigma);
// initial bearing
double fwdAz = MathExtensions.ToDegree(Math.Atan2(cosU2 * sinLambda, cosU1 * sinU2 - sinU1 * cosU2 * cosLambda));
// final bearing
double revAz = MathExtensions.ToDegree(Math.Atan2(cosU1 * sinLambda, -sinU1 * cosU2 + cosU1 * sinU2 * cosLambda));
if (formula == DISTANCE)
{
return(distance);
}
else if (formula == INITIAL_BEARING)
{
return(fwdAz);
}
else if (formula == FINAL_BEARING)
{
return(revAz);
} // should never happpen
else
{
return(double.NaN);
}
}
///<summary>
/// Calculate <a href = "http://en.wikipedia.org/wiki/Great-circle_distance">geodesic
/// distance</a> in Meters between this Object and a second Object passed to
/// this method using <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
public virtual double GetGeodesicDistance(GeoLocation location)
{
return(VincentyFormula(location, DISTANCE));
}
///<summary>
/// Calculate the final <a href = "http://en.wikipedia.org/wiki/Great_circle">geodesic</a> bearing
/// between this Object and a second Object passed to this method using
/// <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
public virtual double GetGeodesicFinalBearing(GeoLocation location)
{
return(VincentyFormula(location, FINAL_BEARING));
}
///<summary>
/// Returns the <a href = "http://en.wikipedia.org/wiki/Rhumb_line">rhumb line</a>
/// distance from the current location to the GeoLocation passed in.
///</summary>
///<param name = "location">
/// the destination location </param>
///<returns> the distance in Meters </returns>
public virtual double GetRhumbLineDistance(GeoLocation location)
{
double R = 6371; // earth's mean radius in km
double dLat = MathExtensions.ToRadians(location.Latitude - Latitude);
double dLon = MathExtensions.ToRadians(Math.Abs(location.Longitude - Longitude));
double dPhi =
Math.Log(Math.Tan(MathExtensions.ToRadians(location.Longitude) / 2 + Math.PI / 4) /
Math.Tan(MathExtensions.ToRadians(Latitude) / 2 + Math.PI / 4));
double q = (Math.Abs(dLat) > 1e-10) ? dLat / dPhi : Math.Cos(MathExtensions.ToRadians(Latitude));
// if dLon over 180° take shorter rhumb across 180° meridian:
if (dLon > Math.PI)
dLon = 2 * Math.PI - dLon;
double d = Math.Sqrt(dLat * dLat + q * q * dLon * dLon);
return d * R;
}
///<summary>
/// Returns the <a href = "http://en.wikipedia.org/wiki/Rhumb_line">rhumb line</a>
/// bearing from the current location to the GeoLocation passed in.
///</summary>
///<param name = "location">
/// destination location </param>
///<returns> the bearing in degrees </returns>
public virtual double GetRhumbLineBearing(GeoLocation location)
{
double dLon = MathExtensions.ToRadians(location.Longitude - Longitude);
double dPhi =
Math.Log(Math.Tan(MathExtensions.ToRadians(location.Latitude) / 2 + Math.PI / 4) /
Math.Tan(MathExtensions.ToRadians(Latitude) / 2 + Math.PI / 4));
if (Math.Abs(dLon) > Math.PI)
dLon = dLon > 0 ? -(2 * Math.PI - dLon) : (2 * Math.PI + dLon);
return MathExtensions.ToDegree(Math.Atan2(dLon, dPhi));
}
///<summary>
/// Calculate the initial <a href = "http://en.wikipedia.org/wiki/Great_circle">geodesic</a> bearing
/// between this Object and a second Object passed to this method using
/// <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
public virtual double GetGeodesicInitialBearing(GeoLocation location)
{
return VincentyFormula(location, INITIAL_BEARING);
}
///<summary>
/// Calculate the final <a href = "http://en.wikipedia.org/wiki/Great_circle">geodesic</a> bearing
/// between this Object and a second Object passed to this method using
/// <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
public virtual double GetGeodesicFinalBearing(GeoLocation location)
{
return VincentyFormula(location, FINAL_BEARING);
}
///<summary>
/// Calculate <a href = "http://en.wikipedia.org/wiki/Great-circle_distance">geodesic
/// distance</a> in Meters between this Object and a second Object passed to
/// this method using <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
public virtual double GetGeodesicDistance(GeoLocation location)
{
return VincentyFormula(location, DISTANCE);
}
/// <summary>
/// Calculate <a href="http://en.wikipedia.org/wiki/Great-circle_distance">geodesic
/// distance</a> in Meters between this Object and a second Object passed to
/// this method using <a href="http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href="http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975.
/// </summary>
/// <param name="location">the destination location</param>
/// <param name="destination">The destination.</param>
/// <returns></returns>
public static double GetGeodesicDistance(GeoLocation location, GeoLocation destination)
{
return VincentyFormula(location, destination, DISTANCE);
}
///<summary>
/// Calculate <a href = "http://en.wikipedia.org/wiki/Great-circle_distance">geodesic
/// distance</a> in Meters between this Object and a second Object passed to
/// this method using <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
///<param name = "formula">
/// This formula calculates initial bearing (<seealso cref = "INITIAL_BEARING" />),
/// final bearing (<seealso cref = "FINAL_BEARING" />) and distance (<seealso cref = "DISTANCE" />). </param>
private double VincentyFormula(GeoLocation location, int formula)
{
double a = 6378137;
double b = 6356752.3142;
double f = 1 / 298.257223563; // WGS-84 ellipsiod
double L = MathExtensions.ToRadians(location.Longitude - Longitude);
double U1 = Math.Atan((1 - f) * Math.Tan(MathExtensions.ToRadians(Latitude)));
double U2 = Math.Atan((1 - f) * Math.Tan(MathExtensions.ToRadians(location.Latitude)));
double sinU1 = Math.Sin(U1), cosU1 = Math.Cos(U1);
double sinU2 = Math.Sin(U2), cosU2 = Math.Cos(U2);
double lambda = L;
double lambdaP = 2 * Math.PI;
double iterLimit = 20;
double sinLambda = 0;
double cosLambda = 0;
double sinSigma = 0;
double cosSigma = 0;
double sigma = 0;
double sinAlpha = 0;
double cosSqAlpha = 0;
double cos2SigmaM = 0;
double C;
while (Math.Abs(lambda - lambdaP) > 1e-12 && --iterLimit > 0)
{
sinLambda = Math.Sin(lambda);
cosLambda = Math.Cos(lambda);
sinSigma =
Math.Sqrt((cosU2 * sinLambda) * (cosU2 * sinLambda) +
(cosU1 * sinU2 - sinU1 * cosU2 * cosLambda) * (cosU1 * sinU2 - sinU1 * cosU2 * cosLambda));
if (sinSigma == 0)
return 0; // co-incident points
cosSigma = sinU1 * sinU2 + cosU1 * cosU2 * cosLambda;
sigma = Math.Atan2(sinSigma, cosSigma);
sinAlpha = cosU1 * cosU2 * sinLambda / sinSigma;
cosSqAlpha = 1 - sinAlpha * sinAlpha;
cos2SigmaM = cosSigma - 2 * sinU1 * sinU2 / cosSqAlpha;
if (double.IsNaN(cos2SigmaM))
cos2SigmaM = 0; // equatorial line: cosSqAlpha=0 (§6)
C = f / 16 * cosSqAlpha * (4 + f * (4 - 3 * cosSqAlpha));
lambdaP = lambda;
lambda = L +
(1 - C) * f * sinAlpha *
(sigma + C * sinSigma * (cos2SigmaM + C * cosSigma * (-1 + 2 * cos2SigmaM * cos2SigmaM)));
}
if (iterLimit == 0)
return double.NaN; // formula failed to converge
double uSq = cosSqAlpha * (a * a - b * b) / (b * b);
double A = 1 + uSq / 16384 * (4096 + uSq * (-768 + uSq * (320 - 175 * uSq)));
double B = uSq / 1024 * (256 + uSq * (-128 + uSq * (74 - 47 * uSq)));
double deltaSigma = B * sinSigma *
(cos2SigmaM +
B / 4 *
(cosSigma * (-1 + 2 * cos2SigmaM * cos2SigmaM) -
B / 6 * cos2SigmaM * (-3 + 4 * sinSigma * sinSigma) * (-3 + 4 * cos2SigmaM * cos2SigmaM)));
double distance = b * A * (sigma - deltaSigma);
// initial bearing
double fwdAz = MathExtensions.ToDegree(Math.Atan2(cosU2 * sinLambda, cosU1 * sinU2 - sinU1 * cosU2 * cosLambda));
// final bearing
double revAz = MathExtensions.ToDegree(Math.Atan2(cosU1 * sinLambda, -sinU1 * cosU2 + cosU1 * sinU2 * cosLambda));
if (formula == DISTANCE)
{
return distance;
}
else if (formula == INITIAL_BEARING)
{
return fwdAz;
}
else if (formula == FINAL_BEARING)
{
return revAz;
} // should never happpen
else
{
return double.NaN;
}
}
/// <summary>
/// Calculate the initial <a href="http://en.wikipedia.org/wiki/Great_circle">geodesic</a> bearing
/// between this Object and a second Object passed to this method using <a href="http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href="http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975.
/// </summary>
/// <param name="location">the destination location</param>
/// <param name="destination">The destination.</param>
/// <returns></returns>
public static double GetGeodesicInitialBearing(GeoLocation location, GeoLocation destination)
{
return VincentyFormula(location, destination, INITIAL_BEARING);
}
public void Setup()
{
String locationName = "Lakewood, NJ";
double latitude = 40.09596; //Lakewood, NJ
double longitude = -74.22213; //Lakewood, NJ
double elevation = 0; //optional elevation
ITimeZone timeZone = new OlsonTimeZone("America/New_York");
GeoLocation location = new GeoLocation(locationName, latitude, longitude, elevation, timeZone);
ComplexZmanimCalendar czc = new ComplexZmanimCalendar(new DateTime(2010, 4, 2), location);
calendar = czc;
}
///<summary>
/// Calculate the initial <a href = "http://en.wikipedia.org/wiki/Great_circle">geodesic</a> bearing
/// between this Object and a second Object passed to this method using
/// <a href = "http://en.wikipedia.org/wiki/Thaddeus_Vincenty">Thaddeus Vincenty's</a>
/// inverse formula See T Vincenty, "<a href = "http://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf">Direct and Inverse
/// Solutions of Geodesics on the Ellipsoid with application of nested
/// equations</a>", Survey Review, vol XXII no 176, 1975
///</summary>
///<param name = "location">
/// the destination location </param>
public virtual double GetGeodesicInitialBearing(GeoLocation location)
{
return(VincentyFormula(location, INITIAL_BEARING));
}
