Geoscience Reference
In-Depth Information
Fig. 7.2
Display from the ETOPO1 elevation data set. h e map uses the function
surf
to
generate a colored surface. h e colorbar provides information on the colormap used to
portray the topographic and bathymetric variations (data from Amante and Eakins 2009).
In this example the maximum elevation for the area is 5,677 m and the
minimum elevation is -5,859 m. h e reference level is the sea level at 0 m.
We now dei ne a coordinate system using the information that the lower-let
corner is latitude 20° south and longitude 30° east. h e resolution is 1 arc
minute, corresponding to 1/60 of a degree.
[LON,LAT] = meshgrid(30:1/60:60,-20:1/60:20);
We now generate a colored surface from the elevation data using the function
surf
.
surf(LON,LAT,ETOPO1)
colormap jet
