GHS-BUILT-H R2023A - GHS building height, derived from AW3D30, SRTM30, and Sentinel2 composite (2018)
收藏资源简介:
The spatial raster dataset depicts the spatial distribution of the building heights as extracted from the filtering of a composite of global digital elevation models (DEM) and the filtering of satellite imagery using linear regression techniques. The used input DEMs are the ALOS World 3D - 30m (AW3D30, 2006-2011) and the Shuttle Radar Topography Mission 30m (SRTM30, 2000). The building heights extracted from these sources are updated using the support of the shadow markers extracted from the Sentinel2 image data composite of the year 2018 (GHS-composite-S2 R2020A). The data is published at 100m resolution in World Mollweide (ESRI:54009). The building height information are summarized to the grid cell as Average of the Gross Building Height (AGBH) and Average of the Net Building Height (ANBH). The AGBH is expressed in terms of cubic meters per surface unit (volumetric built density), while the ANBH is expressed in terms of meters.
本空间栅格数据集展示了建筑高度的空间分布特征,其数据提取流程为:先对全球数字高程模型(DEM)合成结果开展滤波处理,再结合线性回归技术对卫星影像进行滤波操作,最终得到建筑高度数据。本次研究所使用的输入DEM包括ALOS全球30米数字高程模型(ALOS World 3D - 30m,简称AW3D30,2006-2011年)以及航天飞机雷达地形测绘任务30米数据(Shuttle Radar Topography Mission 30m,简称SRTM30,2000年)。本数据集从上述数据源提取的建筑高度,还借助2018年Sentinel-2影像合成数据(GHS-composite-S2 R2020A)中提取的阴影标记完成了更新修正。本数据集以100米分辨率发布,采用摩尔魏特全球投影(World Mollweide,ESRI:54009)坐标系。数据集将建筑高度信息汇总至网格单元,分为总建筑高度平均值(Average of the Gross Building Height,简称AGBH)与净建筑高度平均值(Average of the Net Building Height,简称ANBH)两类指标。其中AGBH以每单位表面积的立方米数(即建筑体积密度)为计量标准,ANBH则以米为计量单位。




