Extract the edges of a path from a graph — path2edge • GeoPressureR

Retrieve the edges in a graph corresponding to the flight transition defined by a path. These edges can be useful to extract flight information specific to a path.

Usage

path2edge(path, tag_graph)

Arguments

path: a GeoPressureR path data.frame
tag_graph: either a tag or a graph GeoPressureR object.

Value

Data.frame of the edge containing:

s: index in 3D (lat-lon-stap) of the origin (source).
t: index in 3D (lat-lon-stap) of the destination (target).
lat_s: latitude of the origin (source).
lat_t: latitude of the destination (target).
lon_s: longitude of the origin (source).
lon_t: longitude of the destination (target).
stap_s: stationary period of the origin (source).
stap_t: stationary period of the destination (target).
distance: Distance (in km) of the flight.
start: end of the flight.
end: start of the flight.
duration: duration of the flight.
n: number of flight.
gs: groundspeed vector expressed as a complex number. You can compute the groundspeed value (km/h) with abs(gs), the W-E and S-N component of the flight with Re(gs) and Im(gs), and the angle/direction with Arg(gs). If graph provided.
ws: if computed with graph_add_wind(), same value as gs. Airspeed is computed with as = gs - ws in complex number to keep the vectorial additive properties. If graph provided.

Extract the edges of a `path` from a `graph`

Usage

Arguments

Value

See also