4.6.2.6. Quelle est la longueur en kilomètre de "Douglas St" à Victoria ?

postgis=# SELECT gid, name, area(the_geom) AS area
          FROM bc_municipality
          WHERE nrings(the_geom) > 1
          ORDER BY area DESC LIMIT 1;
gid  | name         | area
-----+--------------+------------------
12   | SPALLUMCHEEN | 257374619.430216
(1 row)