insert into geometry_columns values ('','public','point_landmark','wkb_geometry',2,1,'GEOMETRY');
insert into geometry_columns values ('','public','poly_landmarks','buffer',2,1,'GEOMETRY');
insert into geometry_columns values ('','public','finalroads','wkb_geometry',2,1,'GEOMETRY');
insert into geometry_columns values ('','public','giant_polygon','the_geom',2,-1,'GEOMETRY');