Abstract: In a navigation apparatus, when a new road is learned based on a travel trace of a vehicle and a new road link representing the learned new road is connected to an existing link, the navigation apparatus designates the existing link as a base link and generates a new link extending along the existing link as a supplement link. In order to set a target point to one link, the navigation apparatus determines whether or not the supplement link is present at the one link. When the supplement link is present at the target point, the navigation apparatus sets the target point to the supplement link.

Abstract: The present method and apparatus can be applied to cultivation of young seedlings of Welsh onion economically in a mass production way utilizing the growing progresses of this vegetable, during which seed coats can be scraped and removed by the flange of each mesh of a screen sheet or screen film when a stalk stretches itself at the knee part uprightly. Young seedlings of Welsh onion are supplied as material for hors-d'oeuvre, soup and Japanese "sushi".