initial polygon (wkt): POLYGON((0 0,0 10,10 10,10 0,0 0))
initial polygon (dsv): (((0, 0), (0, 10), (10, 10), (10, 0), (0, 0)))
first point: POINT(0 0)
new first point: POINT(1 1)
modified polygon(wkt): POLYGON((1 1,0 10,10 10,10 0,0 0,1 1))
modified polygon(dsv): (((1, 1), (0, 10), (10, 10), (10, 0), (0, 0)))
copy of modified via WKT (wkt): POLYGON((1 1,0 10,10 10,10 0,0 0,1 1))
copy of modified via WKT (dsv): (((1, 1), (0, 10), (10, 10), (10, 0), (0, 0), (1, 1)))
trying to correct the invalid polygon
corrected polygon (wkt): POLYGON((1 1,0 10,10 10,10 0,0 0,1 1))
corrected polygon (dsv): (((1, 1), (0, 10), (10, 10), (10, 0), (0, 0), (1, 1)))