SRID=4326;POLYGON((118.64 31.98,118.685 32.06,118.72 32.1,118.73 32.1,118.73 32.065,118.72 32.045,118.76 32.05,118.77 32.04,118.765 32.01,118.755 32.01,118.745 31.985,118.715 31.955,118.655 31.96,118.645 31.975,118.64 31.98))