已知该宗地为六边形，各点坐标为A(380.093，51.529)、B(712.366，94.930)、C(827.939，430.559)、D(628.575，702.535)、E(336.753，633.090)、F(203.843，355.332)
该宗地面积S=0.5*（380.093*94.930-51.529*712.366+712.366*430.559-94.930*827.939+827.939*702.535-430.559*628.575+628.575*633.090-702.535*336.753+336.753*355.332-633.090*203.843+203.843*51.529-355.332*380.093）=282964.058116m2
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