invalid-poly.json

{
   "type": "Polygon",
   "coordinates": [
       [ 
         [100.0, 1.0], 
         [101.0, 1.0], 
         [101.0, 0.0], 
         [100.5, 0.0], 
         [101.0, 1.0], 
         [100.0, 0.0], 
         [100.5, 1.0],
         [100.0, 1.0] 
       ]
   ]
}