public static int GetTimezoneOffsetFromLocationAndDateInSeconds(long timestamp, int latitude, int longitude)
{
var timezone = TimeZoneLookup.GetTimeZone(FixedPointCoordConversion.ToDouble(latitude), FixedPointCoordConversion.ToDouble(longitude));
Instant instant = new Instant(timestamp * 1000);
ZonedDateTime zdt = instant.InZone(DateTimeZoneProviders.Tzdb[timezone.Result]);
return(zdt.Offset.Milliseconds / 1000);
}
/// <summary>
/// Calculate the distance between two coords (expressed as fixed-point values)
/// </summary>
/// <param name="lat1"></param>
/// <param name="lon1"></param>
/// <param name="lat2"></param>
/// <param name="lon2"></param>
/// <returns>Distance in meters, expressed as a fixed-point value</returns>
public static int Measure(int lat1, int lon1, int lat2, int lon2) //with fixed-point coversion
{
var floatingPointResult = Measure(
FixedPointCoordConversion.ToDouble(lat1),
FixedPointCoordConversion.ToDouble(lon1),
FixedPointCoordConversion.ToDouble(lat2),
FixedPointCoordConversion.ToDouble(lon2)
);
return(FixedPointCoordConversion.ToInt(floatingPointResult));
}