I have been trying to mask clouds with the quality control band with landsat 8 imagery. The problem I continue to run into is that the quality control bands mistake tops of buildings and concrete as clouds.
Have you guys had better success with Fmask? I tried using it earlier, but couldn't find out where it put the file. The website said it would be called XXXFmask. Would I even be able to open Fmask files in Arcmap?
These are the steps I've taken. 1) Built raster attribute table for QC band (see below). 2) Selected only the pixels whose values said there were clouds present. 3) Used Raster to Polygon tool to convert selected pixels to a shapefile. 4) Selected all the cloud polygons and used mask tool on image analysis window to remove data from the cloud cells. 5) Now I plan to run my image classification tools. I've included an image of Greenville, TN before and after the raster is masked. NoData cells are displayed in pink for visibility.