how to plot contours in matlab

Question

Muhammad Usman Saleem 2016-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/288163-how-to-plot-contours-in-matlab

回答： KSSV 2016-6-8

I would like to make contours of elevations. My text file which contain lat, lon and elevation data set. I want to genterate contours of this elevation data set.on this help vedio and documentations i able to prepare this code as starting

a=load('2002dec.txt');
>> x=a(:,1);
y=a(:,2);
>> z=a(:,3);
>> [x,y]=meshgrid(60:0.5:78,21:0.5:38);
>> contour(x,y,z)

But getting error.

I also want to set a shape file as back ground of these contours.Any guide line will be highly appriciable.

My text file data and shape file has been attached with this post

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Answer 1

KSSV 2016-6-7

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/288163-how-to-plot-contours-in-matlab#answer_224696

编辑：KSSV 2016-6-7

在 MATLAB Online 中打开

shapefile = 'PAK_adm1.shp' ;
S = shaperead(shapefile) ;
data = importdata('2002dec.txt') ;
x = data(:,1) ; x = unique(x) ;  
y = data(:,2) ; y = unique(y) ; 
z = data(:,3) ;
[X,Y] = meshgrid(x,y) ; 
Z = reshape(z,size(X)) ;
pcolor(Y,X,Z) ; shading interp ;
hold on
for i = 1:length(S)
    plot(S(i).X,S(i).Y,'k') ;

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Muhammad Usman Saleem 2016-6-7

编辑：Muhammad Usman Saleem 2016-6-7

Dear @Dr. Siva Srinivas Kolukula , what this code is doing? It is only producing color image consist on grids. Please tell me what kind of map it is? Whether these are another view to show contours?

Tell me please whether it is DEM?