安徽省数字高程数据产品(ASTER GDEM V2数据)

该数据集为安徽省范围内的ASTER GDEM V2数据产品。ASTER GDEM数据产品基于“先进星载热发射和反辐射计(ASTER)”数据计算生成，是目前唯一覆盖全球陆地表面的高分辨率高程影像数据。ASTER GDEM V2采用了一种先进的算法对V1版GDEM影像进行了改进，提高了数据的空间分辨率精度和高程精度。该算法重新处理了1,500,000幅影像，其中的250，000幅影像是在V1版GDEM数据发布后新获取的影像。此全球30米的数字高程数据产品可以和全球90米分辨率数字高程数据产品互相补充使用。

This dataset comprises the ASTER GDEM V2 data product for Anhui Province, China. The ASTER GDEM data product is computed using data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), and stands as the only high-resolution elevation imagery dataset covering the global land surface to date. ASTER GDEM V2 utilizes an advanced algorithm to refine the Version 1 GDEM imagery, enhancing both the spatial resolution accuracy and vertical elevation accuracy of the dataset. This algorithm has reprocessed 1,500,000 images, 250,000 of which were newly acquired following the release of the Version 1 GDEM data. This global 30-meter digital elevation dataset can be used complementarily with global digital elevation datasets with a 90-meter resolution.