# Documentation of m_track

Global Index (all files) (short | long) | Local Index (files in subdir) (short | long)

## Function Synopsis

    m_track(lon,lat,varargin);

## Help text

     M_TRACK Draw a trackline on a map

    	M_TRACK draws navigation tracklines on a map. The trackline
    	itself is optionally annontated with tick marks, time labels, and
    	date labels.

    	M_TRACK (lon,lat) draws just a plain line. lon&lat are in decimal
    	degrees, +N, -S, +E, -W.

    	M_TRACK (lon,lat,navtimes) draws a line, with tick marks every
    	hour, time labels every four hours, and date labels every twelve
    	hours. navtimes is in MatLab "serial date numbers," representing the
    	number of days since January 1, 0000. By convention, ticks and
    	time labels are drawn on the starboard side, dates on the port.

    	M_TRACK (lon,lat,navtime, 'string', property/value pairs) can be
    	used to change tick marks, time and date label properties. Allowable
    	combinations are:

    	'ticks'		tickmark interval in minutes, default=60
    	'times'		time label interval in minutes, default=240 (4hrs)
    	'dates'		date label interval in minutes, default=720 (12hrs)
    	'timef[ormat]'	format of time string, see datestr(), default=15
    	'datef[ormat]'	format of date string, see datestr(), default=2
    	'color'		color of track/labels, default is black
    	'linew[idth]'	width of trackline, default is current
    	'lines[tyle]'	style of line, default is solid line
    	'fonts[ize]'	size of font, default is current
    	'fontn[ame]'	name of font, default is current
           'clip'		'on' or 'off' (clipping to map)
    	'orien[t]'	label orientation, 'true' or 'upright', default='true'

    	time labels need to be whole multiples of tick intervals. date
    	labels need to be whole multiples of time labels. using '0' for
    	any value will tick/label all points. using a negative number
    	will suppress tick/label.

## Cross-Reference Information

This function calls | This function is called by
--- | ---
m_ll2xy m_proj | m_demo

Pierre-Michel THEVENY <theveny@dt.insu.cnrs.fr>