1st polygon is valid ...
2nd polygon is NOT valid ...
MULTIPOLYGON(((3097 2449,3134 2487,3134 2603,2817 2603,2817 2449,3097 2449)))
((((3097, 2449), (3134, 2487), (3134, 2603), (2817, 2603), (2817, 2449))))
# of points: 5