public async Task <Response <Guid> > GetLocalAirfieldID(IGlobalPoint globalPoint)
{
try
{
var temp = await _airfieldRepository.FindAround(globalPoint);
return(new Response <Guid>(temp.ID));
}
catch (InvalidOperationException)
{
return(new Response <Guid>("No Airfields around this area", true));
}
}
/// <summary>
/// The Distance between two points.
/// </summary>
/// <param name="start">First <see cref="IGlobalPoint"/> point.</param>
/// <param name="end">Second <see cref="IGlobalPoint"/> point.</param>
/// <returns>The number of meters between two points as <see cref="double"/></returns>
public static double Distance(IGlobalPoint start, IGlobalPoint end)
{
double rlat1 = Math.PI * start.Latitude / 180;
double rlat2 = Math.PI * end.Latitude / 180;
double theta = start.Longitude - end.Longitude;
double rtheta = Math.PI * theta / 180;
double dist =
Math.Sin(rlat1) * Math.Sin(rlat2) + Math.Cos(rlat1) *
Math.Cos(rlat2) * Math.Cos(rtheta);
dist = Math.Acos(dist);
dist = dist * 180 / Math.PI;
dist = dist * 60 * 1.1515;
return(dist * 1609.344);
}
public Task <Airfield> FindAround(IGlobalPoint globalPoint)
{
return(GetFullIncludes()
.SingleAsync(ent => GlobalPoint.Distance(ent, globalPoint) <= Constants.AIRFIELD_DESIGNATED_AREA_RADIUS));
}
