// MapKit alternative
public static double MKGetDistanceBetween(Airport airport1, Airport airport2)
{
CLLocationCoordinate2D loc1 = new CLLocationCoordinate2D (airport1.Latitude, airport1.Longitude);
CLLocationCoordinate2D loc2 = new CLLocationCoordinate2D (airport2.Latitude, airport2.Longitude);
MKMapPoint point1 = MKMapPoint.FromCoordinate (loc1);
MKMapPoint point2 = MKMapPoint.FromCoordinate (loc2);
return MKGeometry.MetersBetweenMapPoints (point1, point2) / MetersPerNauticalMile;
}
public AirportAnnotation(Airport airport)
{
Airport = airport;
}
public static double GetDistanceBetween(Airport depart, Airport arrive)
{
// Calculates distance between 2 locations on Earth using the Haversine formula.
// http://www.movable-type.co.uk/scripts/latlong.html
double distLongitude = ToRadians (arrive.Longitude - depart.Longitude);
double distLatitude = ToRadians (arrive.Latitude - depart.Latitude);
double a = Math.Pow (Math.Sin (distLatitude / 2), 2) +
Math.Pow (Math.Sin (distLongitude / 2), 2) *
Math.Cos (ToRadians (depart.Latitude)) *
Math.Cos (ToRadians (arrive.Latitude));
double c = 2 * Math.Atan2 (Math.Sqrt (a), Math.Sqrt (1 - a));
return c * MeanEarthRadius / MetersPerNauticalMile;
}
static bool TryParse(string entry, out Airport airport, ref AirportError error, ref AirportField field, ref string message)
{
string[] fields = entry.Split (new char[] { ':' });
int degrees, minutes, seconds, elevation;
string alt;
int neg;
if (fields.Length != NumFields) {
if (fields.Length < NumFields) {
message = string.Format ("Airport entry is missing {0} fields.", NumFields - fields.Length);
field = (AirportField) (NumFields - fields.Length);
error = AirportError.NotEnoughFields;
} else {
message = string.Format ("Airport entry has too many fields.");
error = AirportError.TooManyFields;
field = AirportField.Elevation;
}
airport = null;
return false;
}
airport = new Airport ();
// Parse ICAO code
if (!IsICAO (fields[0])) {
message = string.Format ("Airport ICAO '{0}' code is invalid.", fields[0]);
field = AirportField.ICAO;
airport = null;
return false;
} else {
airport.ICAO = fields[0];
}
// Parse IATA code
if (!IsIATA (fields[1])) {
message = string.Format ("Airport IATA code '{0}' is invalid.", fields[1]);
field = AirportField.IATA;
airport = null;
return false;
} else if (fields[1] != "N/A") {
airport.IATA = fields[1];
} else {
airport.IATA = "";
}
airport.Name = FixCapitalization (fields[2]);
airport.City = FixCapitalization (fields[3]);
airport.Country = fields[4] == "USA" ? "USA" : FixCapitalization (fields[4]);
if (!Int32.TryParse (fields[5], out degrees) || degrees >= 180) {
message = string.Format ("Airport Latitude (degrees) is invalid.");
field = AirportField.LatitudeDegrees;
airport = null;
return false;
} else if (!Int32.TryParse (fields[6], out minutes) || minutes >= 60) {
message = string.Format ("Airport Latitude (minutes) is invalid.");
field = AirportField.LatitudeMinutes;
airport = null;
return false;
} else if (!Int32.TryParse (fields[7], out seconds) || seconds >= 60) {
message = string.Format ("Airport Latitude (seconds) is invalid.");
field = AirportField.LatitudeSeconds;
airport = null;
return false;
} else if (!(fields[8] == "N" || fields[8] == "S" || fields[8] == "U")) {
message = string.Format ("Airport Latitude direction is invalid.");
field = AirportField.LatitudeDirection;
airport = null;
return false;
} else {
int sign = fields[8][0] == 'N' ? 1 : -1;
airport.Latitude = (sign * (((degrees * 60) + minutes) * 60 + seconds)) / 3600.0;
}
if (!Int32.TryParse (fields[9], out degrees) || degrees >= 180) {
message = string.Format ("Airport Longitude (degrees) is invalid.");
field = AirportField.LongitudeDegrees;
airport = null;
return false;
} else if (!Int32.TryParse (fields[10], out minutes) || minutes >= 60) {
message = string.Format ("Airport Longitude (minutes) is invalid.");
field = AirportField.LongitudeMinutes;
airport = null;
return false;
} else if (!Int32.TryParse (fields[11], out seconds) || seconds >= 60) {
message = string.Format ("Airport Longitude (seconds) is invalid.");
field = AirportField.LongitudeSeconds;
airport = null;
return false;
} else if (!(fields[12] == "E" || fields[12] == "W" || fields[12] == "U")) {
message = string.Format ("Airport Longitude direction is invalid.");
field = AirportField.LongitudeDirection;
airport = null;
return false;
} else {
int sign = fields[12][0] == 'E' ? 1 : -1;
airport.Longitude = (sign * (((degrees * 60) + minutes) * 60 + seconds)) / 3600.0;
}
// Altitude can be below sealevel...
if ((neg = fields[13].IndexOf ('-')) != -1)
alt = fields[13].Substring (neg);
else
alt = fields[13];
if (!Int32.TryParse (alt, out elevation)) {
message = string.Format ("Airport Altitude '{0}' is invalid.", fields[13]);
field = AirportField.Elevation;
airport = null;
return false;
} else {
airport.Elevation = elevation;
}
return true;
}
public static bool TryParse(string entry, out Airport airport)
{
AirportError error = AirportError.NotEnoughFields;
AirportField field = AirportField.Elevation;
string message = null;
if (entry == null) {
airport = null;
return false;
}
return TryParse (entry, out airport, ref error, ref field, ref message);
}
static bool TryParse(string entry, out Airport airport, ref AirportError error, ref AirportField field, ref string message)
{
string[] fields = entry.Split(new char[] { ':' });
int degrees, minutes, seconds, elevation;
string alt;
int neg;
if (fields.Length != NumFields)
{
if (fields.Length < NumFields)
{
message = string.Format("Airport entry is missing {0} fields.", NumFields - fields.Length);
field = (AirportField)(NumFields - fields.Length);
error = AirportError.NotEnoughFields;
}
else
{
message = string.Format("Airport entry has too many fields.");
error = AirportError.TooManyFields;
field = AirportField.Elevation;
}
airport = null;
return(false);
}
airport = new Airport();
// Parse ICAO code
if (!IsICAO(fields[0]))
{
message = string.Format("Airport ICAO '{0}' code is invalid.", fields[0]);
field = AirportField.ICAO;
airport = null;
return(false);
}
else
{
airport.ICAO = fields[0];
}
// Parse IATA code
if (!IsIATA(fields[1]))
{
message = string.Format("Airport IATA code '{0}' is invalid.", fields[1]);
field = AirportField.IATA;
airport = null;
return(false);
}
else if (fields[1] != "N/A")
{
airport.IATA = fields[1];
}
else
{
airport.IATA = "";
}
airport.Name = FixCapitalization(fields[2]);
airport.City = FixCapitalization(fields[3]);
airport.Country = fields[4] == "USA" ? "USA" : FixCapitalization(fields[4]);
if (!Int32.TryParse(fields[5], out degrees) || degrees >= 180)
{
message = string.Format("Airport Latitude (degrees) is invalid.");
field = AirportField.LatitudeDegrees;
airport = null;
return(false);
}
else if (!Int32.TryParse(fields[6], out minutes) || minutes >= 60)
{
message = string.Format("Airport Latitude (minutes) is invalid.");
field = AirportField.LatitudeMinutes;
airport = null;
return(false);
}
else if (!Int32.TryParse(fields[7], out seconds) || seconds >= 60)
{
message = string.Format("Airport Latitude (seconds) is invalid.");
field = AirportField.LatitudeSeconds;
airport = null;
return(false);
}
else if (!(fields[8] == "N" || fields[8] == "S" || fields[8] == "U"))
{
message = string.Format("Airport Latitude direction is invalid.");
field = AirportField.LatitudeDirection;
airport = null;
return(false);
}
else
{
int sign = fields[8][0] == 'N' ? 1 : -1;
airport.Latitude = (sign * (((degrees * 60) + minutes) * 60 + seconds)) / 3600.0;
}
if (!Int32.TryParse(fields[9], out degrees) || degrees >= 180)
{
message = string.Format("Airport Longitude (degrees) is invalid.");
field = AirportField.LongitudeDegrees;
airport = null;
return(false);
}
else if (!Int32.TryParse(fields[10], out minutes) || minutes >= 60)
{
message = string.Format("Airport Longitude (minutes) is invalid.");
field = AirportField.LongitudeMinutes;
airport = null;
return(false);
}
else if (!Int32.TryParse(fields[11], out seconds) || seconds >= 60)
{
message = string.Format("Airport Longitude (seconds) is invalid.");
field = AirportField.LongitudeSeconds;
airport = null;
return(false);
}
else if (!(fields[12] == "E" || fields[12] == "W" || fields[12] == "U"))
{
message = string.Format("Airport Longitude direction is invalid.");
field = AirportField.LongitudeDirection;
airport = null;
return(false);
}
else
{
int sign = fields[12][0] == 'E' ? 1 : -1;
airport.Longitude = (sign * (((degrees * 60) + minutes) * 60 + seconds)) / 3600.0;
}
// Altitude can be below sealevel...
if ((neg = fields[13].IndexOf('-')) != -1)
{
alt = fields[13].Substring(neg);
}
else
{
alt = fields[13];
}
if (!Int32.TryParse(alt, out elevation))
{
message = string.Format("Airport Altitude '{0}' is invalid.", fields[13]);
field = AirportField.Elevation;
airport = null;
return(false);
}
else
{
airport.Elevation = elevation;
}
return(true);
}
public AirportAnnotation(Airport airport, CLLocationCoordinate2D userCoordinates)
{
UserCoordinates = userCoordinates;
Airport = airport;
}