Washington DC Historic Boundary

The Washington D.C. historic boundary was created by connecting all the boundary stone locations to form the DC Maryland border. The vast majority of the stones were located using a field survey in 2011, which employed a GPS-RTK. On the DC Virginia border the line follows the western shoreline of the Potomac River. Read supplemental metadata for more details on the survey.华盛顿哥伦比亚特区（Washington D.C.）历史边界通过连接所有界石点位以划定特区与马里兰州的边界线而构建完成。该批次界石中的绝大多数通过2011年开展的野外勘测完成定位，此次勘测采用了实时动态差分全球定位系统（GPS-RTK）技术。在特区与弗吉尼亚州的边界区段，该边界线沿波托马克河（Potomac River）西岸延伸。如需了解此次勘测的更多详细信息，请查阅补充元数据。