static const ObjectType OBJECT_OWNED_LAND = 3; ///< Owned land 'flag'
static const ObjectType OBJECT_HQ = 4; ///< HeadQuarter of a player
static const ObjectType NUM_OBJECTS_PER_GRF = 255; ///< Number of supported objects per NewGRF; limited to 255 to allow extending Action3 with an extended byte later on.
static const ObjectType NEW_OBJECT_OFFSET = 5; ///< Offset for new objects
static const ObjectType NUM_OBJECTS = 64000; ///< Number of supported objects overall
static const ObjectType NUM_OBJECTS_PER_GRF = NUM_OBJECTS; ///< Number of supported objects per NewGRF
static const ObjectType INVALID_OBJECT_TYPE = 0xFFFF; ///< An invalid object