GMIE: a global maximum irrigation extent and irrigation type dataset derived through irrigation performance during drought stress and machine learning method

GMIE-100 uses the WGS84 coordinate system, longitude, and latitude projection (EPSG:4326). The file format of GMIE-100 is GeoTIFF. The GMIE-100 for irrigation proportion is represented as a single-band image. The pixel value of the GMIE-100 corresponds to the irrigation proportion of the respective spatial grid, with a range of 0-1 and a background value of -99. The data was produced using dry months in the 2017–2019 period for regions that need regular irrigation and the driest months in 2010–2019 for regions that need irrigation occasionally. There are 67 tiles globally with a maximum extent of 21°×21° if most overlapped with land, otherwise, the extents are adjusted according to the terrestrial range. The file is GMIE-100-*log*_*lat*.tif, where *lat* and *log* represent the rounding of the latitude and longitude of a central point. The domain of tiles can be found in the file “tiles of GMIE-100.shp”.The GCPIS was stored in shapefiles formats in zip files.

GMIE-100采用WGS84坐标系与经纬度投影（EPSG:4326）。该数据集的文件格式为GeoTIFF。其中用于表征灌溉占比的GMIE-100数据以单波段影像形式存储，其像素值对应各空间网格的灌溉占比，取值范围为0至1，背景值为-99。
该数据集的制作遵循以下规则：针对需常规灌溉的区域，采用2017–2019年的旱季数据；针对需偶发灌溉的区域，采用2010–2019年的最旱月份数据。
全球范围内共包含67个影像分块，多数与陆地重叠的分块最大覆盖范围为21°×21°，其余分块的范围则根据陆地分布进行调整。
影像文件的命名格式为GMIE-100-*log*_*lat*.tif，其中*lat*与*log*分别代表分块中心点的纬度与经度取整值。各分块的空间范围可从"tiles of GMIE-100.shp"文件中获取。
GCPIS以ZIP压缩包内的Shapefile格式存储。