Aspect derived from 1" SRTM DEM-S
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资源简介：
Aspect measures the direction in which a land surface slope faces. The direction is expressed in degrees from north.
The aspect products were derived from the Smoothed Digital Elevation Model (DEM-S; ANZCW0703014016), which was derived from the 1 arc-second resolution SRTM data acquired by NASA in February 2000. The calculation of aspect from DEM-S accounted for the varying spacing between grid points in the geographic projection.
The aspect data are available at 1 arc-second and 3 arc-second resolution
The 3” resolution version of the aspect product has been masked by the 3” water and ocean mask datasets.
坡向（Aspect）用于表征陆地表面坡面的朝向方位，该方位以正北为基准，以角度数值量化表示。
坡向产品数据集源自平滑数字高程模型（Smoothed Digital Elevation Model，简称DEM-S，编号ANZCW0703014016），该模型由美国国家航空航天局（NASA）2000年2月获取的1弧秒分辨率SRTM数据生成。基于DEM-S计算坡向时，已充分考虑地理投影下网格点间距的差异性。
本次坡向数据提供1弧秒与3弧秒两种分辨率版本。
3弧秒分辨率的坡向产品数据集已采用3弧秒水体与海洋掩膜数据集完成掩膜处理。
提供机构：
Terrestrial Ecosystem Research Network
