Google Earth Engine（GEE）——分别用NDVI和NDWI进行阈值设定从而进行土地类型的划分！

这里唯一要解释的函数就是这个：

updateMask(mask)

说白了就是将不满足你条件的东西去掉，留下满足你要求的影像进行输出，输出图像保留输入图像的元数据和足迹。

Updates an image's mask at all positions where the existing mask is not zero. The output image retains the metadata and footprint of the input image.

Arguments:

this:image (Image):

Input image.

mask (Image):

New mask for the image, as a floating-point value in the range [0, 1] (invalid = 0, valid = 1). If this image has a single band, it is used for all bands in the input image; otherwise, must have the same number of bands as the input image.

Returns: Image

文章来源: blog.csdn.net，作者：此星光明2021年博客之星云计算Top3，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/qq_31988139/article/details/119681092