青藏高原区域30米分辨率遥感数据集（1990-2024）

本文介绍的青藏高原区域30米分辨率数字高程模型（DEM）数据集，基于NASA航天飞机雷达地形测绘任务（SRTM）V4.1版本数据，经过拼接与整理生成。数据采用WGS84椭球投影，以GeoTIFF格式分块存放，覆盖青藏高原全域，为地形研究和生态环境分析提供了重要的基础数据。数据来源于SRTM项目，由NASA与多国机构合作，通过航天飞机搭载雷达进行地形测绘。本数据集基于SRTM V4.1版本数据，经过数据拼接、空缺填补（采用反距离权重插值和克里金插值方法）等处理，确保数据的完整性和准确性。元数据详细记录了数据处理过程和参数设置，便于用户追溯和验证。数据质量经过严格评估，与TanDEM-X DEM和ICESat-2激光测高数据对比显示，高程误差均值小于1米，标准差在合理范围内，表明数据具有较高的精度和可靠性。数据格式规范，采用GeoTIFF格式，兼容性强，便于多平台应用。该数据集已广泛应用于青藏高原的地形研究、生态环境分析和气候变化研究等领域。未来，随着对高原地区研究的深入，该数据集将为冰川动态监测、流域水文模拟、生态脆弱性评估等提供更精准的高程基础，助力高原科学研究和生态保护工作。

This 30-meter resolution digital elevation model (DEM) dataset of the Qinghai-Tibet Plateau is generated based on the NASA Shuttle Radar Topography Mission (SRTM) V4.1 data via mosaicking and post-processing.
Employing the WGS84 ellipsoidal projection and stored in tiled GeoTIFF format, the dataset covers the entire Qinghai-Tibet Plateau, serving as a critical foundational resource for topographic research and eco-environmental analysis.
The original SRTM data was collected by the SRTM project, a collaborative effort between NASA and multiple international institutions using radar mounted on a space shuttle to conduct topographic mapping.
This dataset is derived from the SRTM V4.1 data, and processed through steps including data mosaicking and gap-filling (adopting inverse distance weighting interpolation and Kriging interpolation) to ensure data integrity and accuracy.
The metadata thoroughly documents the data processing procedures and parameter settings, facilitating user traceability and validation.
The dataset's quality has undergone rigorous evaluation; comparisons with TanDEM-X DEM and ICESat-2 laser altimetry data show that the mean elevation error is less than 1 meter, with the standard deviation falling within a reasonable range, demonstrating the high precision and reliability of the dataset.
The dataset adheres to standardized specifications, using the GeoTIFF format which boasts strong compatibility for multi-platform applications.
This dataset has been widely applied in fields such as topographic research, eco-environmental analysis, and climate change research related to the Qinghai-Tibet Plateau.
In the future, with the deepening of research on the plateau region, this dataset will provide more accurate elevation fundamentals for glacier dynamic monitoring, watershed hydrological simulation, ecological vulnerability assessment and other studies, supporting scientific research and ecological conservation efforts on the Qinghai-Tibet Plateau.

搜集汇总

背景与挑战

背景概述

该数据集是覆盖青藏高原全域的30米分辨率数字高程模型（DEM）数据，时间范围为1990年至2024年，基于NASA SRTM V4.1版本数据经过拼接和空缺填补处理生成，采用GeoTIFF格式，数据大小为23.20 GB。数据集具有较高精度，高程误差均值小于1米，适用于地形研究、生态环境分析和气候变化研究等应用，并以开放获取方式共享。