Control vertical exaggeration in map display
daspectm(zunits) sets the figure 'DataAspectRatio' property so that the z-axis is in proportion to the x-and y-projected coordinates. This permits elevation data to be displayed without vertical distortion. The string zunits specifies the units of the elevation data, and can be any string recognized by unitsratio.
daspectm(zunits,vfac,lat,long,az,radius) uses the last input to determine the radius of the sphere. radius can be one of the strings supported by km2deg, or it can be the (numerical) radius of the desired sphere in zunits. If omitted, the default radius of the Earth is used.
Show the elevation map of the Korean peninsula with a vertical exaggeration factor of 30:
load korea [latlim,lonlim] = limitm(map,refvec); worldmap(latlim,lonlim) meshm(map,refvec,size(map),map) demcmap(map) view(3) daspectm('m',30) tightmap camlight
The relationship between the vertical and horizontal coordinates holds only as long as the geoid or scale factor properties of the map axes remain unchanged. If you change the scaling between geographic coordinates and projected axes coordinates, execute daspectm again.