30米分辨率全球一张图(2011)

在海量Landsat 高精度正射影像的基础上，经过半自动的数据挑选、快速自动化镶嵌和匀色等关键技术，制作色彩一致性较高的30 米分辨率全球一张图。数据使用GeoTiff 格式保存，投影为WGS 84 经纬度。为方便用户使用，已进行分块，并内建金字塔。本数据包含全球60°S 到80°N 所有陆地区域影像（除格陵兰岛），每个Path/Row 选择生长季云量最少的一景，在云量较多的区域使用年度中值合成影像。本数据集几何精度高、色彩一致性好，可为遥感应用、虚拟现实等提供基础底图。

Based on massive high-precision orthorectified Landsat imagery, a global single mosaic with high color consistency and 30-meter resolution was produced via key technologies including semi-automatic data selection, rapid automated mosaicking and color balancing. The data is stored in GeoTIFF format, with the projection using the WGS 84 geographic coordinate system (latitude/longitude). To facilitate user access, the data has been tiled and built-in pyramids have been added. This dataset covers all terrestrial regions globally between 60°S and 80°N, excluding Greenland. For each Path/Row, the scene with the least cloud cover during the growing season is selected; for regions with heavy cloud cover, annual median composite imagery is used. This dataset features high geometric accuracy and excellent color consistency, and can serve as a base map for remote sensing applications, virtual reality and other related fields.