Current mouse point from map axes
pt = gcpmap
pt = gcpmap(hndl)
pt = gcpmap returns the
current point (the location of last button click) of the current map
axes in the form
[latitude longitude z-altitude].
pt = gcpmap(hndl) specifies
the map axes in question by its handle.
Set up a map axes with a graticule and display a world map:
axesm robinson gridm on geoshow('landareas.shp')
Click somewhere near Boston, Massachusetts to obtain a current point:
pt = gcpmap pt = 44.171 -69.967 2 44.171 -69.967 0 whos Name Size Bytes Class Attributes pt 2x3 48 double array
gcpmap works much like the standard MATLAB® function
except that the returned matrix is in
[lat lon z],
[x y z].
You must use
view(2) and an ordinary projection
(not the Globe projection) when working with the
CurrentPoint property is updated whenever
a button-click event occurs in a MATLAB figure window. The pointer
does not have to be within the axes, or even the figure window. Coordinates
with respect to the requested axes are returned regardless of the
pointer location. Likewise,
gcpmap will return
values that may look reasonable whether the current point is within
the graticule bounds or not, and thus must be used with care.