2018 Building Footprints

This dataset shows the footprints of all structures within the City of Melbourne. A building footprint is a 2D polygon (or multi-polygon) representation of the base of a building or structure. The footprint is defined as the boundary of the structure where the walls intersect with the ground plane or podium, rather than an outline of the roof area (roofprint).\n\nWhere a building has a significant change in built form, multiple footprint polygons are ‘stacked’ vertically to define shape of the built form. This includes, and is not limited to:\n\n- Tower\n- Podium\n- Setbacks/offsets\n\nTo see the footprints in 3D please refer to our Development Activity Model \n\nThe Australian Height Datum (AHD) is the national vertical datum for Australia. The National Mapping Council adopted the AHD in May 1971 as the datum to which all vertical control mapping would be referred\n\nThe data was captured in May 2018.

本数据集展示了墨尔本市范围内所有建构筑物的建筑足迹（building footprint）。建筑足迹是对建构筑物基底的二维多边形（或多多边形）可视化表达，其定义为建构筑物墙体与地平面或裙楼交接处的边界，而非屋顶区域的轮廓（roofprint）。

当建构筑物的建筑形态存在显著变化时，将通过多个建筑足迹多边形垂直叠加以明确其建筑形态轮廓，涵盖但不限于以下场景：
- 塔楼（Tower）
- 裙楼（Podium）
- 退台/偏移构造（Setbacks/offsets）

若需查看三维形式的建筑足迹，请参阅本机构的开发活动模型（Development Activity Model）。

澳大利亚高程基准面（Australian Height Datum, AHD）为澳大利亚国家垂直基准面。1971年5月，国家测绘委员会正式采用该基准面作为所有垂直控制测绘的参照基准。

本数据集采集于2018年5月。