Mapping Toolbox    
trackg

Display great circle or rhumb line track defined via mouse input

Syntax

Description

This function is used to define great circles or rhumb lines for display using mouse clicks. For each track, two clicks are required, one for each endpoint of the desired track segment. You can modify the track after creation by shift-clicking on it. The track is then in a edit mode, during which you can change the length and position by dragging control points, or by entering values into a control panel. Shift-clicking again exits the edit mode

h = trackg(ntrax) brings forward the current map axes and waits for the user to make (2 x ntrax) mouse clicks. The output h is a vector of handles for the ntrax track segments, which are then displayed.

h = trackg(ntrax,npts) specifies the number of plotting points to be used for each track segment. npts is 100 by default.

h = trackg(ntrax,linestyle) specifies the line style for the displayed track segments, where linestyle is any line style string recognized by the standard MATLAB function line.

h = trackg(ntrax,PropertyName,PropertyValue,...) allows property/value pairs to be set, where PropertyName and PropertyValue are recognized by the line command.

[lat,lon] = trackg(ntrax,npts,...) returns the coordinates of the plotted points rather than the handles of the track segments. Successive segments are stored in separate columns of lat and lon.

h = trackg(track,ntrax,...) specifies the logic with which tracks are calculated. If the string track is 'gc' (the default), great circle path is used. If track is 'rh', rhumb line logic is used.

See Also
track1
 Great circle or rhumb line from point, azimuth, and range
track2
 Great circle or rhumb line from two points
scircleg
 Interactive small circles


  track2 trimcart