google-earth-engine - 从 Earth Engine 导出到驱动器时​​，光栅被拆分为多个文件

Question

当我将光栅文件导出到我的驱动器时，它被分成 4 个部分。为什么会这样？

它可能与我不使用的 dimensions 属性有关。但是没有给出默认值。

我使用了这个命令:

Export.image.toDrive({
  image: exportImg, 
  description: 'description',
  region: roi, 
  scale: 10, 
  crs: 'EPSG:25832',
  maxPixels: 1e13
})

结果是 4 个带有名称的栅格

'description-0000000000-0000000000',

'description-0000018944-0000000000',

'description-0000000000-0000018944',

'description-0000018944-0000018944'

这显然是指宽度和高度。

Answer 1

实际上，您可以通过 ( https://developers.google.com/earth-engine/exporting ) 找到有关此情况的详细信息 正如他们解释的那样:

If the output image is large, it will be exported as multiple files. If you are exporting to GeoTIFF(s), the image is split into tiles. The filename of each tile will be in the form baseFilename-yMin-xMin where xMin and yMin are the coordinates of each tile within the overall bounding box of the exported image.