Gridded 12-direction sky view factor for the contiguous United States, 5-meter resolution with 30-meter ground-level aggregates

This dataset contains sky view factors for 5-meter grid cells covering the contiguous United States. 30-meter aggregates aligned to the Landsat ARD tile grid are also available. The digital elevation model (DEM) was obtained by combining a rasterized dump of the Overture Maps buildings data set from July 2025 with the 1-arc-second USGS 3DEP. Horizon angles every 30 degrees from North (12 different search directions in total) were then calculated from this DEM using the r.horizon GRASS module, parameterized with a 1-kilometer maximum search distance. These horizon angles were then combined to calculate sky view factors Tiles and the coordinate reference system are derived from the Landsat ARD tile grid. Refer to the Landsat Shapefiles and KML Files page for links to a map and a ShapeFile download. See the README file for more information.

本数据集包含覆盖美国本土的5米网格单元的天空视因子（Sky View Factor）数据，同时还提供匹配陆地卫星分析就绪数据（Landsat ARD）瓦片网格的30米聚合数据。本数据集的数字高程模型（Digital Elevation Model, DEM）由2025年7月发布的Overture Maps建筑数据集的栅格化导出数据，与1弧秒分辨率的美国地质调查局3DEP（USGS 3DEP）高程数据融合得到。随后，借助GRASS模块的r.horizon工具，基于该DEM以1千米为最大搜索距离，计算得到以北为基准、每隔30度的地平线角度（共12个搜索方向）。将这些地平线角度进行融合计算，即可得到天空视因子数据。数据集的瓦片及其坐标参考系统均源自Landsat ARD瓦片网格。如需获取地图及形状文件（Shapefile）的下载链接，请访问Landsat Shapefiles与KML文件页面。更多详细信息请参阅自述文件（README）。