In many co-located, collaborative systems there is a need for the constituent devices used to be aware of the physical positions of their networked counterparts. This paper addresses this challenge by presenting a novel method of utilising users’ judgement of direction to obtain the location and orientation of a touch interface. The technique requires a user to draw several arrows on an interface which point towards physical landmarks in an environment. This allows for the setup of interface locations in a way which is (i) quick; (ii) inexpensive; (iii) not encumbering; and (iv) capable of being performed despite obstructions in the environment. A user study is presented which investigates what influence a user’s accuracy has on the technique’s resulting calculated location of an interface. The study reveals that the magnitude of a user’s inaccuracies is proportional to the size of the error in the result and that there is no improvement in user accuracy with practice. Finally, we make observations on the future extension and application of this technique.

中文翻译：

---

通过最少的用户输入确定设备位置

在许多位于同一地点的协作系统中，需要使组成设备知道其联网对等方的物理位置。本文通过提出一种利用用户对方向的判断来获得触摸界面的位置和方向的新颖方法来解决这一挑战。该技术要求用户在界面上绘制几个箭头，这些箭头指向环境中的物理界标。这样就可以以（i）快速的方式设置接口位置。（ii）价格便宜；（iii）不妨碍；（iv）能够在环境受阻的情况下执行。提出了一项用户研究，该研究调查了用户的准确性对该技术产生的接口计算位置的影响。该研究表明，用户不准确的程度与结果中错误的大小成正比，并且实践中用户准确性没有改善。最后，我们对该技术的未来扩展和应用进行了观察。