This example shows how to compute an elevation profile along a straight line using the
mapprofile function. Calculating data values along a path is a common application when working with gridded geodata. For example, you might want to calculate the terrain height along a transect, a road, or a flight path. The
mapprofile function does this, based on numerical data defining a set of waypoints, or by defining them interactively via graphic input from a map display. Values computed for the resulting profile can be displayed in a new plot or returned as output arguments for further analysis or display.
Load the Korean elevation data MAT-file.
Get the latitude and longitude limits using
limitm and use them to set up a map frame via
worldmap plots only the map frame.
[latlim, lonlim] = limitm(map, maplegend); figure worldmap(latlim, lonlim)
Render the map and apply a digital elevation model (DEM) colormap to it.
Define endpoints for a straight-line transect through the region.
plat = [40.5 30.7]; plon = [121.5 133.5];
Compute the elevation profile, using the
mapprofile function with the default track type,
great circle, and the default interpolation type,
[z,rng,lat,lon] = mapprofile(map,maplegend,plat,plon);
Draw the transect in 3-D so it follows the terrain.
Construct a plot of transect elevation and range.