Great circle or rhumb line defined via mouse input
h = trackg(ntrax) h = trackg(ntrax,npts) h = trackg(ntrax,linestyle) h = trackg(ntrax,PropertyName,PropertyValue,...) [lat,lon] = trackg(ntrax,npts,...) h = trackg(track,ntrax,...)
h = trackg(ntrax) brings
forward the current map axes and waits for the user to make (2 xntrax)
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®line function.
h = trackg(ntrax,PropertyName,PropertyValue,...) allows
property name/property value pairs to be set, where PropertyName and PropertyValue are
recognized by the line function.
[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), a great circle path is used. If track is 'rh',
rhumb line logic is used.
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 it. The
track is then in 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 edit