Terain Map System

some things are clear to me for example:

DELETE FROM terrain_swap_defaults WHERE TerrainSwapMap IN (1943, 1876);
INSERT INTO terrain_swap_defaults VALUES
(0, 1943, 'WarForonts -Arathi Alliance),
(0, 1876, 'WarForonts -Arathi Horde);

data Map.db2

but where to look for values for terrain_worldmap ?

terrain_worldmap is mapid and phaseid