Building Structures (2D) (Hosted Feature Layer)

This hosted feature layer contains Building Structures (2D, from Ortho Imagery) hosted at MassGIS' ArcGIS Online account. This dataset consists of 2-dimensional roof outlines ("roofprints") for all buildings larger than 150 square feet, as interpreted by a contractor (Rolta) for the whole area of the Commonwealth using color, 30 cm. DigitalGlobe ortho images obtained in 2011 and 2012, supplemented with LiDAR (Light Detection And Ranging) data collected from 2002 to 2011 for the eastern half of the state. The roofprints as delivered were enhanced by MassGIS using Normalized Digital Surface Models (NDSMs) derived from the same LiDAR data. Other layers were used, including the Property Tax Parcels, to aid in review, especially where LiDAR data were not available. MassGIS has updated the data using aerial imagery from 2019, 2021, 2023 and 2025. Some building structure features were obtained from municipal data. This layer was last updated on May 22, 2026. More...本托管要素图层（hosted feature layer）存储由马萨诸塞州地理信息系统（MassGIS）的ArcGIS Online账号托管的建筑结构（二维，源自正射影像（Ortho Imagery））数据。该数据集涵盖所有面积大于150平方英尺的建筑物的二维屋顶轮廓（roofprints），由承包商Rolta基于2011至2012年获取的30厘米分辨率彩色数字地球（DigitalGlobe）正射影像，对该州全域完成解译生成；针对该州东部区域，还补充使用了2002至2011年采集的激光雷达（Light Detection And Ranging，LiDAR）数据。 交付的原始屋顶轮廓数据经MassGIS利用源自同一套LiDAR数据生成的归一化数字表面模型（NDSMs）进行了增强优化。数据审核环节还参考了包括税收地籍地块（Property Tax Parcels）在内的其他辅助图层，尤其在LiDAR数据覆盖不足的区域。 MassGIS后续又分别基于2019、2021、2023及2025年的航空影像对该数据集进行了更新，部分建筑结构要素源自市政公开数据。本图层最后更新时间为2026年5月22日。更多详情请见后续内容。