input elevation on contor line of map

Hi there :). I wanna ask one question. I finally extract contour line from a map. then I have to input elevation value to make 3D model. I know that elevation of red point on image is 460m. But I don't know how to input that in certain pixel. please help me. How can I do?

Answer 1

[KSSV]

As you have the locations i.e (x,y) values, your third i.e z value would be elevation.

[Kwanghun Choi]

I am sorry of my poor explanation. That contour data don't have z value. So I have to input elevation as z. But I cannot find (x,y) coordinate of red pixel. How can I find that?

[KSSV]

I = imread('Inked20171025_130754_LI.jpg') ;
I1 = rgb2gray(I) ;

[y,x] = find(I1==88) ;
imshow(I)
hold on
plot(x,y,'.b')

(x,y) are the locations of red color in your image

[Kwanghun Choi]

Thank you!! It is very useful for me :)