Mapping

Getting started with the M_map MATLAB Toolbox
Finally, suppose you want to show and label the location of,
say, a mooring at 129W, 48 30'N.
[X,Y]=m_ll2xy(-129,48.5);
line(X,Y,'marker','square','markersize',4,'color','r');
text(X,Y,' M5','vertical','top');
m_ll2xy (and its inverse m_xy2ll) convert from
longitude/latitude coordinates to those of the projection.
Various clipping options can also be specified in converting to
projection coordinates.
If you are willing to accept default clipping setting, you can
use the built-in functions m_line and m_text :
m_line(-129,48.5,'marker','square','markersize',4,'color','r');
m_text(-129,48.5,' M5','vertical','top');
52 o N
136 o W
48 o N
44 o N
132 o W
40 o N
128 o W
56 o N
M5
124 o W
120 o W