2023 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\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 2023.

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）。建筑足迹是指建（构）筑物基底的二维多边形（或多多边形）表达形式，其边界定义为建筑墙体与地面平面或裙楼（podium）相交的位置，而非屋顶区域的轮廓（roofprint）。

当建筑的建造形式发生显著变化时，将通过多个建筑足迹多边形垂直堆叠来界定其整体建造形态。此类情形包括但不限于：

- 塔楼
- 裙楼
- 退台/偏移结构

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

该数据集采集于2023年5月。