Building Outlines

The original building outlines were created from the 2005 Pictometry aerial imagery. The Building Class field was added from the 2011 Community Basemap project and the type 'apartment' was added to that domain in 2011. New building outlines were acquired from the 2011-2012 Pictometry flight and replaced the whole layer joining previous attribute information where possible. Building outlines and change analysis were completed again with the Pictometry flight in 2014. Building outlines and change analysis were completed with the Pictometry flight in 2016. Building outlines and change analysis were completed with the Pictometry flight in 2018. Building outlines and change analysis were completed with the Pictometry flight in 2020, and since then yearly updates have been sourced from Nearmap's AI model. The latest building outlines were created from the February 2025 Nearmap image capture using the Nearmap AI model. Change detection is no longer captured nor are decks. The layer's schema was changed to mirror the new capture method. Building classifications are 1=General/Residential, 2=Government, 3=Medical, 4=Education, 5=Transportation, 6=Commercial, 7=Religious, 8=Recreation, 9=Cultural/Heritage, 10=Hospitality, 11=Airport, 12=Industrial, 13=CommunityCenter, 14=Apartment初始建筑轮廓基于2005年的Pictometry航空影像生成。建筑分类字段源自2011年社区底图项目，且该分类体系于2011年新增了‘公寓’类别。2011-2012年Pictometry航拍任务获取了新的建筑轮廓，并在尽可能保留原有属性信息的前提下替换了全图层数据。2014年、2016年、2018年及2020年，均通过对应年份的Pictometry航拍任务完成建筑轮廓更新与变化分析。2020年起，年度更新数据均由Nearmap AI模型生成。最新的建筑轮廓基于2025年2月采集的Nearmap影像，结合Nearmap AI模型生成。当前不再开展变化检测，也不再采集露台相关信息。该图层的数据模式已完成调整，以匹配新的影像采集流程。建筑分类规则如下：1=通用/住宅，2=政府建筑，3=医疗建筑，4=教育建筑，5=交通设施，6=商业建筑，7=宗教建筑，8=休闲娱乐设施，9=文化/历史遗迹，10=住宿餐饮，11=机场，12=工业建筑，13=社区中心，14=公寓。