Copernicus GLO-30 Digital Elevation Model

<p> The Copernicus DEM is a Digital Surface Model (DSM) which represents the surface of the Earth including buildings, infrastructure and vegetation. This DSM is derived from an edited DSM named WorldDEM, where flattening of water bodies and consistent flow of rivers has been included. In addition, editing of shore- and coastlines, special features such as airports, and implausible terrain structures has also been applied.</p> <p> The WorldDEM product is based on the radar satellite data acquired during the TanDEM-X Mission, which is funded by a Public Private Partnership between the German State, represented by the German Aerospace Centre (DLR) and Airbus Defence and Space. OpenTopography is providing access to the global 30m (GLO-30) DSM through the <a href='https://registry.opendata.aws/copernicus-dem/'>public AWS S3 bucket established by Sinergise. </a> </p><br /> <b>Note:</b> <ul> <li>GLO-30 coverage is not entirely global because a small subset of tiles covering specific countries are not yet released to the public by the Copernicus Programme. <a href='https://registry.opendata.aws/copernicus-dem/'>See the AWS landing page</a> for details on which countries are excluded.</li> <li>In the original datasets (available via OpenTopography bulk download or <a href='https://registry.opendata.aws/copernicus-dem/'>the Sinergise aws bucket</a>), the longitudinal spacing of cells increases as a function of latitude for latitudes north of 50N and south of 50S. <a href='https://copernicus-dem-30m.s3.amazonaws.com/readme.html'>See the original documentation </a> for details. However, in order to keep the pixel dimensions uniform, OpenTopography resamples data north of 50 degrees latitude and south of -50 degrees latitude in order to output a consistent 30m or 90m product <b>for data accessed through the web-interface or API</b>.</li> <li>GLO-30 is available on a free basis for the general public under the terms and conditions of the License found <a href='https://spacedata.copernicus.eu/documents/20126/0/CSCDA_ESA_Mission-specific+Annex.pdf'>here</a></li> </ul>

<p> 哥白尼数字高程模型（Copernicus DEM）是一种数字地表模型（Digital Surface Model，DSM），用于表征包含建筑物、基础设施与植被在内的地球表面。该DSM源自经编辑处理的WorldDEM数字地表模型，其中已加入水体填平与河流连贯流动的修正处理。此外，项目团队还对海岸线、机场等特殊地物以及不合理的地形结构开展了编辑优化工作。</p> <p> WorldDEM产品基于TanDEM-X任务采集的雷达卫星数据构建，该任务由德国联邦政府代表——德国航空航天中心（DLR）与空客防务与航天公司（Airbus Defence and Space）组建的公私合作伙伴关系资助。OpenTopography通过Sinergise搭建的公开AWS S3存储桶，向全球提供30米分辨率（GLO-30）的DSM数据。</p><br /> <b>注意:</b> <ul> <li>GLO-30的覆盖范围并非完全覆盖全球，因有少量覆盖特定国家的瓦片尚未由哥白尼计划（Copernicus Programme）向公众发布。<a href="https://registry.opendata.aws/copernicus-dem/">请参阅AWS登录页面</a>了解排除国家的详细信息。</li> <li>在可通过OpenTopography批量下载或<a href="https://registry.opendata.aws/copernicus-dem/">Sinergise的AWS存储桶</a>获取的原始数据集中，北纬50°以北与南纬50°以南区域的单元格经度间距会随纬度变化而增大。详细技术细节请参阅<a href="https://copernicus-dem-30m.s3.amazonaws.com/readme.html">原始文档</a>。不过，为保证像素尺寸统一，OpenTopography会对北纬50°以北与南纬50°以南的数据进行重采样，以输出分辨率统一为30米或90米的产品，<b>该处理仅适用于通过网页界面或API访问的数据</b>。</li> <li>社会公众可免费获取GLO-30数据，具体使用需遵循<a href="https://spacedata.copernicus.eu/documents/20126/0/CSCDA_ESA_Mission-specific+Annex.pdf">此处</a>公布的许可条款与条件。</li> </ul>