Building Footprints (File Geodatabase Format)

Note: please go to https://data.sfgov.org/d/ynuv-fyni to access the same data in additional open formats.

These footprint extents are collapsed from an earlier 3D building model provided by Pictometry of 2010, and have been refined from a version of building masses publicly available on the open data portal for over two years. The building masses were manually split with reference to parcel lines, but using vertices from the building mass wherever possible. These split footprints correspond closely to individual structures even where there are common walls; the goal of the splitting process was to divide the building mass wherever there was likely to be a firewall.An arbitrary identifier was assigned based on a descending sort of building area for 177,023 footprints. The centroid of each footprint was used to join a property identifier from a draft of the San Francisco Enterprise GIS Program's cartographic base, which provides continuous coverage with distinct right-of-way areas as well as selected nearby parcels from adjacent counties. See accompanying document SF_BldgFoot_2017-05_description.pdf for more on methodology and motivation https://data.sfgov.org/d/ynuv-fyni/ about

请注意，您可以通过访问https://data.sfgov.org/d/ynuv-fyni获取该数据集的额外开放格式。这些建筑足迹范围是从2010年由Pictometry提供的早期3D建筑模型中合并而来，并经过对两年前在公开数据门户上公开发布的建筑质量版本的精细化处理。建筑质量是通过参考地块线手动分割的，但在可能的情况下使用了建筑质量的多边形顶点。这些分割出的足迹与单个结构紧密对应，即使在有共有墙的情况下也是如此；分割过程的目标是在可能存在防火墙的地方分割建筑质量。基于建筑面积的降序排列，为177,023个足迹分配了一个任意的标识符。每个足迹的重心被用来与旧金山企业GIS计划的地图基础草稿中的属性标识符相连接，该计划提供了连续的覆盖范围，具有独特的通行权区域，以及相邻县选定附近的地块。有关方法和动机的更多信息，请参阅随附文档SF_BldgFoot_2017-05_description.pdf。关于更多详情，请访问https://data.sfgov.org/d/ynuv-fyni/。