Regular meshgrids in MATLAB

Hi I have created the mesh grid by using

[X,Y]=meshgrid(lon,lat);% code

I want to superimpose the mesh onto the digital elevation model to extract the geographical coordinates of the nodes.

[madhan ravi]

Where is the rest of the code?

Answer 1

[KSSV]

YOu DEM should be having a grid and the respective H values. Use 2D interpolation i.e interp2 to get DEM values at your grid.

Check the below demo code:

[X,Y,Z] = peaks(100) ;   % your DEM say

x0 = -2 ; x1 = 2 ;   % Want to extract top these limits 
y0 = -1 ; y1 = 0 ;

N = 100 ;
x = linspace(x0,x1,N) ;
y = linspace(y0,y1,N) ;
[Xi,Yi] = meshgrid(x,y) ;

Zi = interp2(X,Y,Z,Xi,Yi) ;

subplot(121)
pcolor(X,Y,Z) ; shading interp 
subplot(122)
pcolor(Xi,Yi,Zi) ; shading interp ;