SDB101 » Relational Model
 

ID
area
population
geometry-ID
340
1
1201
1030










geometry-ID
arco-ID
1030
A






arco-ID
nodo
A
1
A
2




nodo
x-coor
y-coor
1
0
1
2
0
0








census

Última modificación: Thursday, 24 de November de 2005, 06:39