全球基本地貌类型单元数据集(2023年)

该数据为全球基本地貌类型单元数据集，时间为2023年。该套数据集是“深时数字地球”(Deep-time Digital Earth, DDE)国际大科学计划的系列成果之一，空间范围涵盖全球所有的陆表区域。其包含两级地貌类型单元，第一级地貌单元为平原，丘陵，小起伏山地，中起伏山地，大起伏山地和极大起伏山地六类，第二级地貌类型依据海拔高度将平原，丘陵和山地等一级地貌单元进一步细分为不同海拔高程级别的类型，共23类。数据为矢量格式，数据精度相当于1:20万比例尺。24年增加栅格版本数据，分辨率为30m。This is a global basic geomorphic type unit dataset released in 2023. It is one of the series of achievements of the international mega-science program Deep-time Digital Earth (DDE), with spatial coverage over all global land surface areas. The dataset contains two-level geomorphic type units: the first-level geomorphic units include six categories, namely plain, hill, low-relief mountain, moderate-relief mountain, large-relief mountain and extreme-relief mountain; the second-level geomorphic types further subdivide the first-level units such as plains, hills and mountains into 23 categories based on elevation levels. The original data is in vector format, with an accuracy equivalent to the 1:200,000 scale. A raster version of the dataset was added in 2024, with a spatial resolution of 30 meters.

搜集汇总

背景与挑战

背景概述

该数据集是2023年发布的全球基本地貌类型单元数据，覆盖全球陆表区域，包含两级分类体系，将地貌细分为23个类型，提供矢量和30米分辨率栅格格式，精度相当于1:20万比例尺。数据基于FABDEM、AW3D30等公开数据源，通过自动化处理和人工修正生成，适用于地貌学、地理科学等领域的研究和应用。