arcgis里的arc什么意思？

这个词根是“拱、弧”的意思,几何中用arc表示圆弧。 arc出现于很多语言，如：英语，法语，匈牙利语和罗马尼亚语。 原型就是arc。英语词义如下： arc Plural arcs arc (plural arcs) A curve. (geometry) A circular arc. (geometry) A continuous section of any curve. (mathematics) A continuous mapping from a real interval (typically [0, 1]) into a space. (graph theory) A directed edge. (electrical) A flow of current across an insulating medium; especially a hot, luminous discharge between either two electrodes or as lightning a story arc.