Global 30m Height Above Nearest Drainage (HAND)

Height Above Nearest Drainage (HAND) is a terrain model that normalizes topography to the relative heights along the drainage network and is used to describe the relative soil gravitational potentials or the local drainage potentials. Each pixel value represents the vertical distance to the nearest drainage. The HAND data provides near-worldwide land coverage at 30 meters and was produced from the 2021 release of the Copernicus GLO-30 Public DEM as distributed in the Registry of Open Data on AWS.

近河道海拔高度（Height Above Nearest Drainage, HAND）是一种将地形归一化至水系网络沿线相对高度的地形模型，可用于表征相对土壤重力势或局地排水能力。每个像素的数值代表该点位到最近河道的垂直距离。该HAND数据集具备近乎全球的陆地覆盖范围，空间分辨率为30米，其数据源自AWS开放数据注册表中发布的2021版哥白尼GLO-30公共数字高程模型（Copernicus GLO-30 Public DEM）。

搜集汇总

背景与挑战

背景概述

Global 30m HAND是一个全球30米分辨率的数字高程模型，用于描述地形相对于排水网络的相对高度，适用于农业、灾害响应和水文等领域。数据集基于Copernicus GLO-30 Public DEM生成，采用CC0许可，由Alaska Satellite Facility管理。