MATLAB: How to extract polygons coordinates from shape file

coordinatesextractpolygonshape file

hello, I have a shape file which contains 10 polygons I need to extract the coordinates for each polygon how can I do that ?

thanks,

Best Answer

S = shaperead(shapefile) ;   % Read shape file 
N = length(S) ;              % total number of polygons 
% GEt coordinates of each polygon
for i = 1:N
    [S(i).X ;S(i).Y] ;
end

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MATLAB: Extract Shapes (Polygons) from boundaries

I doubt you'll find ready-made code to do it. However, you can use houghlines() to fit line segments to your edge points. Once you do, you can test which line segments are perpendicular to each other, etc...

MATLAB: Drawing Polygon shapes with data

You can draw the rectangles from your struct as follows:

k = size(out,2);
figure(), hold on
for i = 1:k
    a = size(out(i).model_data,1);
    for j =1:(a-1)
        coord = out(i).model_data(j:j+1,:);
        rectangle('Position',[coord(1,1) 0 coord(2,1)-coord(1,1) coord(1,2)])
        axis([0 0.2 0 0.02])
    end
end

When you have a non-scalar structure, this plots all rectangles on the same figure. For seperate figures you should move "figure(), hold on" into the first loop.

Best Answer

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