Dear Visitor and Charleston Reconstructed were location-based augmented reality (AR) experiences created between 2018 and 2020 dealing with two controversial monument sites in the US. The projects were motivated by the ability of AR to 1) link layers of context to physical sites in ways that are otherwise difficult or impossible and 2) to visualize changes to physical spaces, potentially inspiring changes to the spaces themselves. We discuss the projects' motivations, designs, and deployments. We reflect on how physical changes to the projects' respective sites radically altered their outcomes, and we describe lessons for future work in location-based AR, particularly for projects in contested spaces.

翻译：《尊敬的访客》与《查尔斯顿重建》是2018至2020年间创作的两款基于位置的增强现实（AR）体验项目，分别探讨美国两处颇具争议的纪念碑遗址。项目动机源于增强现实的两大能力：1）以传统方法难以甚至无法实现的方式，将多层背景信息与物理空间建立关联；2）可视化物理空间的变化，进而激发对空间本身的改造。本文阐述了项目的创作动机、设计方案与部署实践，反思了物理空间的实际变更如何根本性地改变了项目结果，并总结了面向未来基于位置AR工作的经验教训，尤其是关于争议空间项目的启示。