Building Footprints - Open Data

Building Footprints are polygon features representing photogrammetrically captured rough approximations of buildings. They they do not show the exact footprint. The current version of building footprints are based on aerial photography taken in Spring of 2024. Updates are made for significant structures as needed from digitized development plan approvals and notifications of demolitions until the next aerial flyover (2031). The Building Footprints layer contains building structures including mobile homes, garages, water storage tanks and known underground building features. Updated quarterly.建筑基底轮廓（Building Footprints）为通过摄影测量获取的建筑物粗略近似多边形要素，其并未呈现精确的建筑占地轮廓。当前版本的建筑基底轮廓数据集基于2024年春季拍摄的航空影像。针对重要建构筑物的更新工作，将依据数字化开发规划审批文件与拆迁通知开展，直至下一次航空航拍作业（2031年）。建筑基底轮廓图层涵盖的建筑结构包括移动住宅、车库、储水罐以及已知的地下建筑设施。该数据集每季度更新一次。