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Continue to ChatSoutheast coordinates of De Grey Map - SD, United States https://www.yellowmaps.com/usgs/places.cfm?latdec=44.25&londec=-99.875&fname=Southeast%20coordinates%20of%20De%20Grey&fclass=Topo%20Map&st=SD&county=United%20States&el=---&quad=De%20Grey&quadid=44099c8