Data: Global DEM Data

Introduction

全球范围的DEM数据介绍。

GMTED2010

GMTED2010（Global Multi-resolution Terrain Elevation Data）. These data have been collected from a variety of sources using aggregation methods. These datasets are best used for working at the continental scale and with very large regions. 7.5 Arc Sec (225m), 15 Arc Sec (450m), and 30 Arc Sec (1km).数据源主要来自SRTM，占比接近70%。

SRTM

SRTM（Shuttle Radar Topography Mission）. 数据在2000年采样。第一版是90m空间分辨率，第二版是30m分辨率。 Downlink: http://viewfinderpanoramas.org/Coverage%20map%20viewfinderpanoramas_org3.htm

ASTER GDEM2

数据是30m空间分辨率。采样时间似乎是2000年。

AW3D30

AW3D30（ALOS World 3D - 30m）. 数据是30m空间分辨率。

ALOS DEM[updated 2020-11-14]

数据是12.5米，一个下载的介绍，这是一个视频。

References

[1] GMTED2010 – Global Multi-resolution Terrain Elevation Data, Yale.

[2] GMTED2010 Open-File Report 2011-1073.

[3] U.S. Releases Enhanced Shuttle Land Elevation Data.

[4] ASTER Global Digital Elevation Map Announcement.

[5] Free Global DEM Data Sources – Digital Elevation Models.

[6] ALOS Global Digital Surface Model "ALOS World 3D - 30m" (AW3D30).