Global Wind Atlas v4 (orography)

The GWA 4.0 uses the Copernicus DEM digital surface model (DSM) GLO-30, with a horizontal grid spacing of 1 arc second (0.00027 degree, which is approximately 30 m). The related material contains the DOI to the original dataset and for the GWA4 the dataset was resampled to the above grid spacing using linear interpolation, because the original data has a resolution that is varying with latitude. We stress that this is not a digital terrain model (DTM), and therefore forests are to some extent double counted, because the satellites used for determining the terrain elevation cannot penetrate the canopy and thus include forest heights in the reported elevation. This introduces additional uncertainty for the wind flow modelling in forested areas.When using this dataset, please cite using the following DOI:<br>Floors, R. et al. (2025) <i>Global Wind Atlas v4 (orography)</i>, 10.11583/DTU.28955282<br>

GWA 4.0采用哥白尼数字高程模型（Copernicus DEM）配套的数字表面模型（DSM）GLO-30，其水平网格间距为1角秒（0.00027度，约30米）。相关材料包含原始数据集的DOI，GWA4版本的数据集通过线性插值法重采样至上述网格间距，原因是原始数据的分辨率随纬度变化。需特别说明的是，本数据集并非数字地形模型（Digital Terrain Model, DTM），因此森林区域会存在一定程度的重复统计问题：用于测定地形高程的卫星无法穿透林冠层，因此测得的高程值包含了林木高度，这会为林区的风场模拟引入额外的不确定性。使用本数据集时，请按以下DOI进行引用：
Floors, R. 等人 (2025) 《全球风能图集第4版（地形高程）》，10.11583/DTU.28955282