间数据库舆例 Country Boundary name capital population id-boundary id-boundary id-contour Germany Berlin 785 B1 B2 C2 France Paris 58 B2 B3 Contour d-contour point-numid-point Point id-point y 452 1000 P2 365 875 C1 C1 P3 386 985 296 825空间数据库实例 name capital population id-boundary Germany France  Berlin Paris  78.5 58  B1B2  Country Boundary id-boundary id-contour B1B2B2B3 B3  C1 C2 C3 C4 C5  Contour id-contour point-num id-point C1 C1 C1 C1 C2 C2 C2  2 1 3  1 2   P1P2P3 P4 P5   Point id-point x y P1P2P3P4P5  452 365 386 296 589  1000 875 985 825 189