Building Footprint

The shape and orientation of the ground floor of all structures in a local government. This information is typically compiled from orthoimagery or other aerial photography sources. This representation of the building footprints supports the local government basemaps. It also serves as a source for public works, public safety, planning and other agencies that are responsible for the active management of site addresses, facilities, and land use information.本数据集涵盖某地方政府所辖范围内所有建（构）筑物首层的轮廓与朝向信息。此类信息通常通过正射影像（orthoimagery）或其他航空摄影数据源采集整编。该建筑基底轮廓数据集可为该地方政府的基础底图提供支撑，同时亦可作为公共工程、公共安全、规划及其他负责主动管理场地地址、设施与土地利用信息的机构的数据源。