path2edge: Extract the edges of a 'path' from a 'graph'

In Rafnuss/GeoPressureR: Global Positioning by Atmospheric Pressure

Extract the edges of a path from a graph

Description

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.

See Also

GeoPressureManual

Other path: ind2path(), path2elevation(), plot_path()

Rafnuss/GeoPressureR documentation built on April 17, 2025, 12:58 p.m.