public static double ToYard(this double value, UnitsOfLength unit)
{
var result = 0.0;
switch (unit)
{
case UnitsOfLength.Foot:
result = value * 0.33333333;
break;
case UnitsOfLength.Kilometer:
result = value * 1093.6133;
break;
case UnitsOfLength.Meter:
result = value * 1.0936133;
break;
case UnitsOfLength.Mile:
result = value * 1760;
break;
case UnitsOfLength.Yard:
result = value;
break;
case UnitsOfLength.NauticalMile:
result = value * 2025.37183;
break;
}
return(result);
}
/// <summary>
/// Calculates the distance between two points of latitude and longitude.
/// Great Link - http://www.movable-type.co.uk/scripts/latlong.html
/// </summary>
/// <param name="coordinate1">First coordinate.</param>
/// <param name="coordinate2">Second coordinate.</param>
/// <param name="unitsOfLength">Sets the return value unit of length.</param>
public Double Distance(Coordinate coordinate1, Coordinate coordinate2, UnitsOfLength unitsOfLength)
{
var theta = coordinate1.Longitude - coordinate2.Longitude;
var distance = Math.Sin(coordinate1.Latitude.ToRadian()) * Math.Sin(coordinate2.Latitude.ToRadian()) +
Math.Cos(coordinate1.Latitude.ToRadian()) * Math.Cos(coordinate2.Latitude.ToRadian()) *
Math.Cos(theta.ToRadian());
distance = Math.Acos(distance);
distance = distance.ToDegree();
distance = distance * 60 * 1.1515;
if (unitsOfLength == UnitsOfLength.Kilometer)
{
distance = distance * Constants.MilesToKilometers;
}
else if (unitsOfLength == UnitsOfLength.NauticalMiles)
{
distance = distance * Constants.MilesToNautical;
}
else if (unitsOfLength == UnitsOfLength.Meter)
{
distance = distance * Constants.MilesToKilometers * 1000;
}
return(distance);
}
public static double ToMeter(this double value, UnitsOfLength unit)
{
var result = 0.0;
switch (unit)
{
case UnitsOfLength.Foot:
result = value * 0.3048;
break;
case UnitsOfLength.Kilometer:
result = value * 1000;
break;
case UnitsOfLength.Meter:
result = value;
break;
case UnitsOfLength.Mile:
result = value * 1609.344;
break;
case UnitsOfLength.Yard:
result = value * 0.9144;
break;
case UnitsOfLength.NauticalMile:
result = value * 1852;
break;
}
return(result);
}
public Area ConvertTo(UnitsOfLength units)
{
if (Units == units)
{
return(this);
}
//tood: fix Area.ConvertTo()
// this method isn't working. I think we need to take the square root of the area, convert to the new units and then square the new value for the correct area.
// other ideas: https://www.varsitytutors.com/hotmath/hotmath_help/topics/convert-units-of-area-and-volume
switch (units)
{
case UnitsOfLength.Foot:
return(new Area(Value.ToFoot(Units), units));
case UnitsOfLength.Yard:
return(new Area(Value.ToYard(Units), units));
case UnitsOfLength.Mile:
return(new Area(Value.ToMile(Units), units));
case UnitsOfLength.Meter:
return(new Area(Value.ToMeter(Units), units));
case UnitsOfLength.Kilometer:
return(new Area(Value.ToKilometer(Units), units));
case UnitsOfLength.NauticalMile:
return(new Area(Value.ToNauticalMile(Units), units));
default:
throw new NotSupportedException();
}
}
public Distance ConvertTo(UnitsOfLength units)
{
if (Units == units)
{
return(this);
}
switch (units)
{
case UnitsOfLength.Foot:
return(new Distance(Value.ToFoot(Units), units));
case UnitsOfLength.Yard:
return(new Distance(Value.ToYard(Units), units));
case UnitsOfLength.Mile:
return(new Distance(Value.ToMile(Units), units));
case UnitsOfLength.Meter:
return(new Distance(Value.ToMeter(Units), units));
case UnitsOfLength.Kilometer:
return(new Distance(Value.ToKilometer(Units), units));
case UnitsOfLength.NauticalMile:
return(new Distance(Value.ToNauticalMile(Units), units));
default:
throw new NotSupportedException();
}
}
public Distance GetDistance(UnitsOfLength units)
{
// it's faster to keep the calculations in nautical miles until the sumation is complete because NM is the native units for distance calculations.
var value = 0.0;
for (var i = 0; i < Count - 2; ++i)
{
value += this[i].GetDistance(this[i + 1], UnitsOfLength.NauticalMile).Value;
}
return(new Distance(value, UnitsOfLength.NauticalMile).ConvertTo(units));
}
/// <summary>
/// Calculates the distance between two points of latitude and longitude.
/// Great Link - http://www.movable-type.co.uk/scripts/latlong.html
/// </summary>
/// <param name="coordinate1">First coordinate.</param>
/// <param name="coordinate2">Second coordinate.</param>
/// <param name="unitsOfLength">Sets the return value unit of length.</param>
public static Double Distance(Coordinates coordinate1, Coordinates coordinate2, UnitsOfLength unitsOfLength)
{
var theta = coordinate1.Longitude - coordinate2.Longitude;
var distance = Math.Sin(coordinate1.Latitude.ToRadian()) * Math.Sin(coordinate2.Latitude.ToRadian()) +
Math.Cos(coordinate1.Latitude.ToRadian()) * Math.Cos(coordinate2.Latitude.ToRadian()) *
Math.Cos(theta.ToRadian());
distance = Math.Acos(distance);
distance = distance.ToDegree();
distance = distance * 60 * 1.1515;
if (unitsOfLength == UnitsOfLength.Kilometer)
distance = distance * MilesToKilometers;
else if (unitsOfLength == UnitsOfLength.NauticalMiles)
distance = distance * MilesToNautical;
return (distance);
}
public virtual Area GetArea(UnitsOfLength units)
{
//https://planetcalc.com/1466/
//https://www.mathsisfun.com/geometry/herons-formula.html
double area = 0.0;
for (var i = 1; i < Count - 2; ++i)
{
var a = this[0].GetDistance(this[i], units);
var b = this[i].GetDistance(this[i + 1], units);
var c = this[0].GetDistance(this[i + 1], units);
var s = (a + b + c) / 2.0;
var x = s.Value * (s - a).Value * (s - b).Value * (s - c).Value;
area += Math.Sqrt(x);
}
return(new Area(area, units));
}
public Area(double value, UnitsOfLength units)
{
Value = value;
Units = units;
}
public Distance(double value, UnitsOfLength units)
{
Value = value;
Units = units;
}
