TF = issimplified(polyin)
returns a logical array whose elements are 1 (true) if the
corresponding elements of polyin are well-defined polygons.
Well-defined polygons have boundaries that contain no intersections and are properly
nested.
Warning: Polyshape has duplicate vertices, intersections, or other inconsistencies that may produce inaccurate or unexpected results. Input data has been modified to create a well-defined polyshape.
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