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How to crop a shapefile with a polyon?

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Hajar
Hajar 2018-5-8
评论： KSSV 2018-5-9
Is it possible to crop a shapefile with a polygon (potentially a circle) using Matlab. I have the coordinates of buildings in a shapefile (and in xlsx file as well), and would like to extract the buildings within a given circle. Is that possible with Matlab?

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回答（1 个）

KSSV
KSSV 2018-5-8
Read about inpolyon.
S = shaperead('my shape file') ;
S = [[S(:).X]' [S(:).Y]'] ;
idx = inpolygon(S(:,1),S(:,2),xc,yc) ; % where xc, yc are your circle coordinates
  2 个评论
Hajar
Hajar 2018-5-8
Thank you very much for your feedback. But how can I include the radius of the circle?
KSSV
KSSV 2018-5-9
You should be knowing this......you said you have a polygon....any ways...to describe a circle..you need a radius r and center c. YOu decide it where you want a circle with what radius. Any more doubts?

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