make_route_envelope {himach}

Make range-constrained envelope between 2 airports

Description

make_route_envelope finds the range envelope for a given route

Usage

make_route_envelope(ac, ap2, envelope_points = 200, fuzz = 0.005)

Arguments

ac, ap2

See find_route

envelope_points

How many points are used to define the ellipse? Default 200.

fuzz

Add a little margin to the range, to allow the longest range to be flown, rather than be cut off at the boundary. (Default 0.005)

Details

The 'route envelope' is the region within which a route from A to B must remain. This is an ellipse.

It differs from the pure 'range envelope' which is the points which an aircraft can reach from a given airport.

Value

sf POLYGON with ad hoc coordinate reference system.

Examples

# Need aircraft and airport datasets
ac <- make_aircraft(warn = FALSE)
ap <- make_airports()
z <- make_route_envelope(ac[1,], make_AP2("EGLL","KJFK",ap))