PROBLEM TO BE SOLVED: To provide a new technique for generating correct field surface map data.SOLUTION: A field work vehicle comprises: a levee work device which is provided on a travel vehicle body for performing a work to a levee on a field； a boundary position calculation part 61 for calculating a positional coordinate of a boundary point on a boundary between the levee and the field surface, on the basis of a positional coordinate of a work position of the levee work device with respect to the levee being calculated on the basis of positioning data； and a map data generation part 62 for generating field surface map data which indicates a contour of the field surface, on the basis of the positional coordinate of the boundary point which is chronologically calculated by the boundary position calculation part 61.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2020,JPO&INPIT【課題】正確な圃場面地図データを生成するための、新しい技術の提供。【解決手段】圃場作業車は、圃場の畔に対する作業を行うために走行車体に装備された畔作業装置と、測位データに基づいて算出された畔作業装置の畔に対する作業箇所の位置座標に基づいて、畔と圃場面との間の境界線上の境界点の位置座標を算出する境界位置算出部６１と、境界位置算出部６１によって経時的に算出された境界点の位置座標に基づいて、圃場面の外形を示す圃場面地図データを生成する地図データ生成部６２とを備える。【選択図】図４
