Performs subpixel classification and calculates the fractional abundance of different land cover types for individual pixels. The function calculates the fractional cover for individual pixels that contain multiple land cover types. It generates a multiband layer, where each band corresponds to the fractional abundance of each land cover class. For example, you can use it to perform land cover classification on a multispectral image to identify photosynthetic vegetation, bare soil, and dead or nonphotosynthetic vegetation.