gis=> d contour;
                                            Table "public.contour"
    Column    |            Type             | Collation | Nullable |                 Default
--------------+-----------------------------+-----------+----------+------------------------------------------
 ogc_fid      | integer                     |           | not null | nextval('contour_ogc_fid_seq'::regclass)
 id           | numeric(8,0)                |           |          |
 height       | numeric(12,3)               |           |          |
 wkb_geometry | geometry(LineString,900914) |           |          |
Indexes:
    "contour_pkey" PRIMARY KEY, btree (ogc_fid)
    "contour_wkb_geometry_geom_idx" gist (wkb_geometry)