摘要：
DECLARE @BJ GEOGRAPHY DECLARE @XT GEOGRAPHY SELECT @BJ= geography::Point('39.92889', '116.38833', 4326) SELECT @XT = geography::Point('37.0630556', '... 阅读全文
摘要：
import java.util.HashMap;import java.util.Map; public class MapDistance { private static double EARTH_RADIUS = 6378.137; private ... 阅读全文