全国县域1:100万地貌类型单元数据

数据为包含全国县域单元内的地貌类型组合信息的全国县域行政区划矢量数据。全国各个县域涉及的地貌类型组合包括平原、台地区，平原、丘陵区等共32种。主要是通过利用全国县域行政区划矢量数据和中国1:100万数字地貌数据库中的基本地貌类型数据进行基于ArcGIS软件平台的空间叠加分析、几何计算等，统计全国不同县域内基本地貌类型的面积及所占百分比，将地貌类型面积占县域单元总面积比例较高的前两种地貌类型作为该县域单元内的主要地貌类型组合而获得的全国县域1:100万地貌类型单元数据。

This dataset is a national county-level administrative division vector dataset that carries geomorphic type combination information for each county-level unit. A total of 32 geomorphic type combinations are involved across all counties, including plain and platform areas, plain and hilly areas, and so on. It was primarily generated through the following steps: first, utilize the national county-level administrative division vector dataset and basic geomorphic type data from China's 1:1,000,000-scale digital geomorphology database; second, conduct spatial overlay analysis, geometric calculations and other related operations on the ArcGIS software platform; third, count the area and percentage of each basic geomorphic type within all county-level units nationwide; finally, take the top two geomorphic types with the highest proportion of the total area of the county-level unit as the main geomorphic type combination for that county, thereby obtaining the national 1:1,000,000-scale county-level geomorphic type unit dataset.

搜集汇总

背景与挑战

背景概述

该数据集为全国县域1:100万地貌类型单元数据，基于全国县域行政区划矢量数据和1:100万数字地貌数据库，通过ArcGIS空间叠加分析统计了每个县域内主要地貌类型组合（共32种，如平原、台地区等）及其面积百分比。数据覆盖中国全境，精度为1:100万，适用于地理学领域的分析和研究，具有较高的访问量，表明其在实际应用中受到关注。