BAS=[YR=1993] W12S28W42S28E2S2E8 FOP=[YR=1997] E24N2W24S2$ N2E24S2E8 FOP=[YR=2000] E16N64W22S28W40S36E6N2 W2 N28E42 N28E12S56W12S2$N2E12 N56$.